diff --git a/Makefile b/Makefile
index 20c4f86ef..691843d49 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,7 @@ clean:
 	cd deps/linenoise && $(MAKE) $@
 	cd deps/jemalloc && $(MAKE) distclean
 	cd deps/lua && $(MAKE) $@
+	-(cd deps/jemalloc && $(MAKE) distclean)
 
 $(TARGETS):
 	cd src && $(MAKE) $@
diff --git a/deps/hiredis/hiredis.c b/deps/hiredis/hiredis.c
index f2135bace..b27c63b83 100644
--- a/deps/hiredis/hiredis.c
+++ b/deps/hiredis/hiredis.c
@@ -50,7 +50,7 @@ typedef struct redisReader {
     size_t pos; /* buffer cursor */
     size_t len; /* buffer length */
 
-    redisReadTask rstack[3]; /* stack of read tasks */
+    redisReadTask rstack[9]; /* stack of read tasks */
     int ridx; /* index of stack */
     void *privdata; /* user-settable arbitrary field */
 } redisReader;
@@ -347,9 +347,9 @@ static int processMultiBulkItem(redisReader *r) {
     int root = 0;
 
     /* Set error for nested multi bulks with depth > 1 */
-    if (r->ridx == 2) {
+    if (r->ridx == 8) {
         redisSetReplyReaderError(r,sdscatprintf(sdsempty(),
-            "No support for nested multi bulk replies with depth > 1"));
+            "No support for nested multi bulk replies with depth > 7"));
         return -1;
     }
 
diff --git a/redis.conf b/redis.conf
index 098c28da9..9e9eac5f8 100644
--- a/redis.conf
+++ b/redis.conf
@@ -319,6 +319,30 @@ auto-aof-rewrite-min-size 64mb
 # your server forever. Set it to 0 or a negative value for unlimited execution.
 lua-time-limit 60000
 
+################################## SLOW LOG ###################################
+
+# The Redis Slow Log is a system to log queries that exceeded a specified
+# execution time. The execution time does not include the I/O operations
+# like talking with the client, sending the reply and so forth,
+# but just the time needed to actually execute the command (this is the only
+# stage of command execution where the thread is blocked and can not serve
+# other requests in the meantime).
+# 
+# You can configure the slow log with two parameters: one tells Redis
+# what is the execution time, in microseconds, to exceed in order for the
+# command to get logged, and the other parameter is the length of the
+# slow log. When a new command is logged the oldest one is removed from the
+# queue of logged commands.
+
+# The following time is expressed in microseconds, so 1000000 is equivalent
+# to one second. Note that a negative number disables the slow log, while
+# a value of zero forces the logging of every command.
+slowlog-log-slower-than 10000
+
+# There is no limit to this length. Just be aware that it will consume memory.
+# You can reclaim memory used by the slow log with SLOWLOG RESET.
+slowlog-max-len 1024
+
 ############################### ADVANCED CONFIG ###############################
 
 # Hashes are encoded in a special way (much more memory efficient) when they
diff --git a/src/Makefile b/src/Makefile
index 7e4b829d6..84cb1cda2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -61,7 +61,7 @@ QUIET_CC = @printf '    %b %b\n' $(CCCOLOR)CC$(ENDCOLOR) $(SRCCOLOR)$@$(ENDCOLOR
 QUIET_LINK = @printf '    %b %b\n' $(LINKCOLOR)LINK$(ENDCOLOR) $(BINCOLOR)$@$(ENDCOLOR);
 endif
 
-OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o lzf_c.o lzf_d.o pqsort.o zipmap.o sha1.o ziplist.o release.o networking.o util.o object.o db.o replication.o rdb.o t_string.o t_list.o t_set.o t_zset.o t_hash.o config.o aof.o pubsub.o multi.o debug.o sort.o intset.o syncio.o cluster.o crc16.o endian.o scripting.o
+OBJ = adlist.o ae.o anet.o dict.o redis.o sds.o zmalloc.o lzf_c.o lzf_d.o pqsort.o zipmap.o sha1.o ziplist.o release.o networking.o util.o object.o db.o replication.o rdb.o t_string.o t_list.o t_set.o t_zset.o t_hash.o config.o aof.o pubsub.o multi.o debug.o sort.o intset.o syncio.o cluster.o crc16.o endian.o slowlog.o scripting.o
 BENCHOBJ = ae.o anet.o redis-benchmark.o sds.o adlist.o zmalloc.o
 CLIOBJ = anet.o sds.o adlist.o redis-cli.o zmalloc.o release.o
 CHECKDUMPOBJ = redis-check-dump.o lzf_c.o lzf_d.o
@@ -86,38 +86,37 @@ ae_kqueue.o: ae_kqueue.c
 ae_select.o: ae_select.c
 anet.o: anet.c fmacros.h anet.h
 aof.o: aof.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 cluster.o: cluster.c redis.h fmacros.h config.h ae.h sds.h dict.h \
-  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
-config.o: config.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
-crc16.o: crc16.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
-db.o: db.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
-debug.o: debug.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h sha1.h
-dict.o: dict.c fmacros.h dict.h zmalloc.h
-diskstore.o: diskstore.c redis.h fmacros.h config.h ae.h sds.h dict.h \
   adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h \
+  slowlog.h
+config.o: config.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
+crc16.o: crc16.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
+db.o: db.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
+debug.o: debug.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h \
   sha1.h
-dscache.o: dscache.c redis.h fmacros.h config.h ae.h sds.h dict.h \
-  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+dict.o: dict.c fmacros.h dict.h zmalloc.h
 endian.o: endian.c
 intset.o: intset.c intset.h zmalloc.h endian.h
 lzf_c.o: lzf_c.c lzfP.h
 lzf_d.o: lzf_d.c lzfP.h
 multi.o: multi.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 networking.o: networking.c redis.h fmacros.h config.h ae.h sds.h dict.h \
-  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h \
+  slowlog.h
 object.o: object.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 pqsort.o: pqsort.c
 pubsub.o: pubsub.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 rdb.o: rdb.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h lzf.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h \
+  lzf.h
 redis-benchmark.o: redis-benchmark.c fmacros.h ae.h \
   ../deps/hiredis/hiredis.h sds.h adlist.h zmalloc.h
 redis-check-aof.o: redis-check-aof.c fmacros.h config.h
@@ -125,27 +124,33 @@ redis-check-dump.o: redis-check-dump.c lzf.h
 redis-cli.o: redis-cli.c fmacros.h version.h ../deps/hiredis/hiredis.h \
   sds.h zmalloc.h ../deps/linenoise/linenoise.h help.h
 redis.o: redis.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h \
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h \
   asciilogo.h
 release.o: release.c release.h
 replication.o: replication.c redis.h fmacros.h config.h ae.h sds.h dict.h \
-  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h \
+  slowlog.h
 sds.o: sds.c sds.h zmalloc.h
 sha1.o: sha1.c sha1.h config.h
+slowlog.o: slowlog.c redis.h fmacros.h config.h ae.h sds.h dict.h \
+  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h \
+  slowlog.h
 sort.o: sort.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h pqsort.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h \
+  pqsort.h
 syncio.o: syncio.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 t_hash.o: t_hash.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 t_list.o: t_list.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 t_set.o: t_set.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 t_string.o: t_string.c redis.h fmacros.h config.h ae.h sds.h dict.h \
-  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  adlist.h zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h \
+  slowlog.h
 t_zset.o: t_zset.c redis.h fmacros.h config.h ae.h sds.h dict.h adlist.h \
-  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h
+  zmalloc.h anet.h zipmap.h ziplist.h intset.h version.h util.h slowlog.h
 util.o: util.c fmacros.h util.h
 ziplist.o: ziplist.c zmalloc.h util.h ziplist.h endian.h
 zipmap.o: zipmap.c zmalloc.h endian.h
@@ -197,8 +202,8 @@ clean:
 dep:
 	$(CC) -MM *.c -I ../deps/hiredis -I ../deps/linenoise
 
-test: redis-server
-	@(cd ..; (which tclsh >/dev/null && tclsh tests/test_helper.tcl --tags "${TAGS}" --file "${FILE}") || echo "You need to install Tcl in order to run tests.")
+test: redis-server redis-check-aof
+	@(cd ..; (which tclsh8.5 >/dev/null && tclsh8.5 tests/test_helper.tcl --tags "${TAGS}") || echo "You need to install Tcl (tclsh8.5) in order to run tests.")
 
 bench:
 	./redis-benchmark
diff --git a/src/aof.c b/src/aof.c
index ac6b97915..b43f99f5e 100644
--- a/src/aof.c
+++ b/src/aof.c
@@ -287,6 +287,8 @@ int loadAppendOnlyFile(char *filename) {
 
         /* The fake client should not have a reply */
         redisAssert(fakeClient->bufpos == 0 && listLength(fakeClient->reply) == 0);
+        /* The fake client should never get blocked */
+        redisAssert((fakeClient->flags & REDIS_BLOCKED) == 0);
 
         /* Clean up. Command code may have changed argv/argc so we use the
          * argv/argc of the client instead of the local variables. */
diff --git a/src/config.c b/src/config.c
index 88a00d382..5442e0366 100644
--- a/src/config.c
+++ b/src/config.c
@@ -298,6 +298,12 @@ void loadServerConfig(char *filename) {
             server.cluster.configfile = zstrdup(argv[1]);
         } else if (!strcasecmp(argv[0],"lua-time-limit") && argc == 2) {
             server.lua_time_limit = strtoll(argv[1],NULL,10);
+        } else if (!strcasecmp(argv[0],"slowlog-log-slower-than") &&
+                   argc == 2)
+        {
+            server.slowlog_log_slower_than = strtoll(argv[1],NULL,10);
+        } else if (!strcasecmp(argv[0],"slowlog-max-len") && argc == 2) {
+            server.slowlog_max_len = strtoll(argv[1],NULL,10);
         } else {
             err = "Bad directive or wrong number of arguments"; goto loaderr;
         }
@@ -471,6 +477,12 @@ void configSetCommand(redisClient *c) {
     } else if (!strcasecmp(c->argv[2]->ptr,"lua-time-limit")) {
         if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
         server.lua_time_limit = ll;
+    } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-log-slower-than")) {
+        if (getLongLongFromObject(o,&ll) == REDIS_ERR) goto badfmt;
+        server.slowlog_log_slower_than = ll;
+    } else if (!strcasecmp(c->argv[2]->ptr,"slowlog-max-len")) {
+        if (getLongLongFromObject(o,&ll) == REDIS_ERR || ll < 0) goto badfmt;
+        server.slowlog_max_len = (unsigned)ll;
     } else {
         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
             (char*)c->argv[2]->ptr);
@@ -645,6 +657,14 @@ void configGetCommand(redisClient *c) {
     if (stringmatch(pattern,"lua-time-limit",0)) {
         addReplyBulkCString(c,"lua-time-limit");
         addReplyBulkLongLong(c,server.lua_time_limit);
+    if (stringmatch(pattern,"slowlog-log-slower-than",0)) {
+        addReplyBulkCString(c,"slowlog-log-slower-than");
+        addReplyBulkLongLong(c,server.slowlog_log_slower_than);
+        matches++;
+    }
+    if (stringmatch(pattern,"slowlog-max-len",0)) {
+        addReplyBulkCString(c,"slowlog-max-len");
+        addReplyBulkLongLong(c,server.slowlog_max_len);
         matches++;
     }
     setDeferredMultiBulkLength(c,replylen,matches*2);
diff --git a/src/db.c b/src/db.c
index a02f30438..26af2f21a 100644
--- a/src/db.c
+++ b/src/db.c
@@ -476,6 +476,9 @@ int expireIfNeeded(redisDb *db, robj *key) {
 
     if (when < 0) return 0; /* No expire for this key */
 
+    /* Don't expire anything while loading. It will be done later. */
+    if (server.loading) return 0;
+
     /* If we are running in the context of a slave, return ASAP:
      * the slave key expiration is controlled by the master that will
      * send us synthesized DEL operations for expired keys.
@@ -513,10 +516,24 @@ void expireGenericCommand(redisClient *c, robj *key, robj *param, long offset) {
         addReply(c,shared.czero);
         return;
     }
-    if (seconds <= 0) {
-        if (dbDelete(c->db,key)) server.dirty++;
-        addReply(c, shared.cone);
+    /* EXPIRE with negative TTL, or EXPIREAT with a timestamp into the past
+     * should never be executed as a DEL when load the AOF or in the context
+     * of a slave instance.
+     *
+     * Instead we take the other branch of the IF statement setting an expire
+     * (possibly in the past) and wait for an explicit DEL from the master. */
+    if (seconds <= 0 && !server.loading && !server.masterhost) {
+        robj *aux;
+
+        redisAssert(dbDelete(c->db,key));
+        server.dirty++;
+
+        /* Replicate/AOF this as an explicit DEL. */
+        aux = createStringObject("DEL",3);
+        rewriteClientCommandVector(c,2,aux,key);
+        decrRefCount(aux);
         signalModifiedKey(c->db,key);
+        addReply(c, shared.cone);
         return;
     } else {
         time_t when = time(NULL)+seconds;
diff --git a/src/debug.c b/src/debug.c
index 511512dde..966e0eb40 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -281,6 +281,12 @@ void debugCommand(redisClient *c) {
             d = sdscatprintf(d, "%02x",digest[j]);
         addReplyStatus(c,d);
         sdsfree(d);
+    } else if (!strcasecmp(c->argv[1]->ptr,"sleep") && c->argc == 3) {
+        double dtime = strtod(c->argv[2]->ptr,NULL);
+        long long utime = dtime*1000000;
+
+        usleep(utime);
+        addReply(c,shared.ok);
     } else {
         addReplyError(c,
             "Syntax error, try DEBUG [SEGFAULT|OBJECT <key>|SWAPIN <key>|SWAPOUT <key>|RELOAD]");
diff --git a/src/multi.c b/src/multi.c
index ba3a0cd6c..f0b8fc856 100644
--- a/src/multi.c
+++ b/src/multi.c
@@ -24,14 +24,14 @@ void freeClientMultiState(redisClient *c) {
 }
 
 /* Add a new command into the MULTI commands queue */
-void queueMultiCommand(redisClient *c, struct redisCommand *cmd) {
+void queueMultiCommand(redisClient *c) {
     multiCmd *mc;
     int j;
 
     c->mstate.commands = zrealloc(c->mstate.commands,
             sizeof(multiCmd)*(c->mstate.count+1));
     mc = c->mstate.commands+c->mstate.count;
-    mc->cmd = cmd;
+    mc->cmd = c->cmd;
     mc->argc = c->argc;
     mc->argv = zmalloc(sizeof(robj*)*c->argc);
     memcpy(mc->argv,c->argv,sizeof(robj*)*c->argc);
@@ -78,6 +78,7 @@ void execCommand(redisClient *c) {
     int j;
     robj **orig_argv;
     int orig_argc;
+    struct redisCommand *orig_cmd;
 
     if (!(c->flags & REDIS_MULTI)) {
         addReplyError(c,"EXEC without MULTI");
@@ -105,18 +106,22 @@ void execCommand(redisClient *c) {
     unwatchAllKeys(c); /* Unwatch ASAP otherwise we'll waste CPU cycles */
     orig_argv = c->argv;
     orig_argc = c->argc;
+    orig_cmd = c->cmd;
     addReplyMultiBulkLen(c,c->mstate.count);
     for (j = 0; j < c->mstate.count; j++) {
         c->argc = c->mstate.commands[j].argc;
         c->argv = c->mstate.commands[j].argv;
-        call(c,c->mstate.commands[j].cmd);
+        c->cmd = c->mstate.commands[j].cmd;
+        call(c);
 
         /* Commands may alter argc/argv, restore mstate. */
         c->mstate.commands[j].argc = c->argc;
         c->mstate.commands[j].argv = c->argv;
+        c->mstate.commands[j].cmd = c->cmd;
     }
     c->argv = orig_argv;
     c->argc = orig_argc;
+    c->cmd = orig_cmd;
     freeClientMultiState(c);
     initClientMultiState(c);
     c->flags &= ~(REDIS_MULTI|REDIS_DIRTY_CAS);
diff --git a/src/networking.c b/src/networking.c
index b95ef946a..a4eee4643 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -36,6 +36,7 @@ redisClient *createClient(int fd) {
     c->reqtype = 0;
     c->argc = 0;
     c->argv = NULL;
+    c->cmd = NULL;
     c->multibulklen = 0;
     c->bulklen = -1;
     c->sentlen = 0;
@@ -461,6 +462,7 @@ static void freeClientArgv(redisClient *c) {
     for (j = 0; j < c->argc; j++)
         decrRefCount(c->argv[j]);
     c->argc = 0;
+    c->cmd = NULL;
 }
 
 void freeClient(redisClient *c) {
@@ -961,5 +963,7 @@ void rewriteClientCommandVector(redisClient *c, int argc, ...) {
     /* Replace argv and argc with our new versions. */
     c->argv = argv;
     c->argc = argc;
+    c->cmd = lookupCommand(c->argv[0]->ptr);
+    redisAssert(c->cmd != NULL);
     va_end(ap);
 }
diff --git a/src/redis.c b/src/redis.c
index f4e3f6239..7e9c6fd5c 100644
--- a/src/redis.c
+++ b/src/redis.c
@@ -28,6 +28,7 @@
  */
 
 #include "redis.h"
+#include "slowlog.h"
 
 #ifdef HAVE_BACKTRACE
 #include <execinfo.h>
@@ -194,7 +195,8 @@ struct redisCommand redisCommandTable[] = {
     {"object",objectCommand,-2,0,NULL,0,0,0,0,0},
     {"client",clientCommand,-2,0,NULL,0,0,0,0,0},
     {"eval",evalCommand,-3,REDIS_CMD_DENYOOM,zunionInterGetKeys,0,0,0,0,0},
-    {"evalsha",evalShaCommand,-3,REDIS_CMD_DENYOOM,zunionInterGetKeys,0,0,0,0,0}
+    {"evalsha",evalShaCommand,-3,REDIS_CMD_DENYOOM,zunionInterGetKeys,0,0,0,0,0},
+    {"slowlog",slowlogCommand,-2,0,NULL,0,0,0,0,0}
 };
 
 /*============================ Utility functions ============================ */
@@ -871,6 +873,10 @@ void initServerConfig() {
     populateCommandTable();
     server.delCommand = lookupCommandByCString("del");
     server.multiCommand = lookupCommandByCString("multi");
+    
+    /* Slow log */
+    server.slowlog_log_slower_than = REDIS_SLOWLOG_LOG_SLOWER_THAN;
+    server.slowlog_max_len = REDIS_SLOWLOG_MAX_LEN;
 }
 
 void initServer() {
@@ -958,6 +964,7 @@ void initServer() {
 
     if (server.cluster_enabled) clusterInit();
     scriptingInit();
+    slowlogInit();
     srand(time(NULL)^getpid());
 }
 
@@ -1004,18 +1011,20 @@ struct redisCommand *lookupCommandByCString(char *s) {
 }
 
 /* Call() is the core of Redis execution of a command */
-void call(redisClient *c, struct redisCommand *cmd) {
-    long long dirty, start = ustime();
+void call(redisClient *c) {
+    long long dirty, start = ustime(), duration;
 
     dirty = server.dirty;
-    cmd->proc(c);
+    c->cmd->proc(c);
     dirty = server.dirty-dirty;
-    cmd->microseconds += ustime()-start;
-    cmd->calls++;
+    duration = ustime()-start;
+    c->cmd->microseconds += duration;
+    slowlogPushEntryIfNeeded(c->argv,c->argc,duration);
+    c->cmd->calls++;
 
     if (server.appendonly && dirty)
-        feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc);
-    if ((dirty || cmd->flags & REDIS_CMD_FORCE_REPLICATION) &&
+        feedAppendOnlyFile(c->cmd,c->db->id,c->argv,c->argc);
+    if ((dirty || c->cmd->flags & REDIS_CMD_FORCE_REPLICATION) &&
         listLength(server.slaves))
         replicationFeedSlaves(server.slaves,c->db->id,c->argv,c->argc);
     if (listLength(server.monitors))
@@ -1032,8 +1041,6 @@ void call(redisClient *c, struct redisCommand *cmd) {
  * and other operations can be performed by the caller. Otherwise
  * if 0 is returned the client was destroied (i.e. after QUIT). */
 int processCommand(redisClient *c) {
-    struct redisCommand *cmd;
-
     /* The QUIT command is handled separately. Normal command procs will
      * go through checking for replication and QUIT will cause trouble
      * when FORCE_REPLICATION is enabled and would be implemented in
@@ -1045,28 +1052,29 @@ int processCommand(redisClient *c) {
     }
 
     /* Now lookup the command and check ASAP about trivial error conditions
-     * such wrong arity, bad command name and so forth. */
-    cmd = lookupCommand(c->argv[0]->ptr);
-    if (!cmd) {
+     * such as wrong arity, bad command name and so forth. */
+    c->cmd = lookupCommand(c->argv[0]->ptr);
+    if (!c->cmd) {
         addReplyErrorFormat(c,"unknown command '%s'",
             (char*)c->argv[0]->ptr);
         return REDIS_OK;
-    } else if ((cmd->arity > 0 && cmd->arity != c->argc) ||
-               (c->argc < -cmd->arity)) {
+    } else if ((c->cmd->arity > 0 && c->cmd->arity != c->argc) ||
+               (c->argc < -c->cmd->arity)) {
         addReplyErrorFormat(c,"wrong number of arguments for '%s' command",
-            cmd->name);
+            c->cmd->name);
         return REDIS_OK;
     }
 
     /* Check if the user is authenticated */
-    if (server.requirepass && !c->authenticated && cmd->proc != authCommand) {
+    if (server.requirepass && !c->authenticated && c->cmd->proc != authCommand)
+    {
         addReplyError(c,"operation not permitted");
         return REDIS_OK;
     }
 
     /* If cluster is enabled, redirect here */
     if (server.cluster_enabled &&
-                !(cmd->getkeys_proc == NULL && cmd->firstkey == 0)) {
+                !(c->cmd->getkeys_proc == NULL && c->cmd->firstkey == 0)) {
         int hashslot;
 
         if (server.cluster.state != REDIS_CLUSTER_OK) {
@@ -1074,7 +1082,7 @@ int processCommand(redisClient *c) {
             return REDIS_OK;
         } else {
             int ask;
-            clusterNode *n = getNodeByQuery(c,cmd,c->argv,c->argc,&hashslot,&ask);
+            clusterNode *n = getNodeByQuery(c,c->cmd,c->argv,c->argc,&hashslot,&ask);
             if (n == NULL) {
                 addReplyError(c,"Multi keys request invalid in cluster");
                 return REDIS_OK;
@@ -1093,7 +1101,7 @@ int processCommand(redisClient *c) {
      * keys in the dataset). If there are not the only thing we can do
      * is returning an error. */
     if (server.maxmemory) freeMemoryIfNeeded();
-    if (server.maxmemory && (cmd->flags & REDIS_CMD_DENYOOM) &&
+    if (server.maxmemory && (c->cmd->flags & REDIS_CMD_DENYOOM) &&
         zmalloc_used_memory() > server.maxmemory)
     {
         addReplyError(c,"command not allowed when used memory > 'maxmemory'");
@@ -1103,8 +1111,10 @@ int processCommand(redisClient *c) {
     /* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */
     if ((dictSize(c->pubsub_channels) > 0 || listLength(c->pubsub_patterns) > 0)
         &&
-        cmd->proc != subscribeCommand && cmd->proc != unsubscribeCommand &&
-        cmd->proc != psubscribeCommand && cmd->proc != punsubscribeCommand) {
+        c->cmd->proc != subscribeCommand &&
+        c->cmd->proc != unsubscribeCommand &&
+        c->cmd->proc != psubscribeCommand &&
+        c->cmd->proc != punsubscribeCommand) {
         addReplyError(c,"only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context");
         return REDIS_OK;
     }
@@ -1113,7 +1123,7 @@ int processCommand(redisClient *c) {
      * we are a slave with a broken link with master. */
     if (server.masterhost && server.replstate != REDIS_REPL_CONNECTED &&
         server.repl_serve_stale_data == 0 &&
-        cmd->proc != infoCommand && cmd->proc != slaveofCommand)
+        c->cmd->proc != infoCommand && c->cmd->proc != slaveofCommand)
     {
         addReplyError(c,
             "link with MASTER is down and slave-serve-stale-data is set to no");
@@ -1121,20 +1131,20 @@ int processCommand(redisClient *c) {
     }
 
     /* Loading DB? Return an error if the command is not INFO */
-    if (server.loading && cmd->proc != infoCommand) {
+    if (server.loading && c->cmd->proc != infoCommand) {
         addReply(c, shared.loadingerr);
         return REDIS_OK;
     }
 
     /* Exec the command */
     if (c->flags & REDIS_MULTI &&
-        cmd->proc != execCommand && cmd->proc != discardCommand &&
-        cmd->proc != multiCommand && cmd->proc != watchCommand)
+        c->cmd->proc != execCommand && c->cmd->proc != discardCommand &&
+        c->cmd->proc != multiCommand && c->cmd->proc != watchCommand)
     {
-        queueMultiCommand(c,cmd);
+        queueMultiCommand(c);
         addReply(c,shared.queued);
     } else {
-        call(c,cmd);
+        call(c);
     }
     return REDIS_OK;
 }
@@ -1305,22 +1315,6 @@ sds genRedisInfoString(char *section) {
             );
     }
 
-    /* Allocation statistics */
-    if (allsections || !strcasecmp(section,"allocstats")) {
-        if (sections++) info = sdscat(info,"\r\n");
-        info = sdscat(info, "# Allocstats\r\nallocation_stats:");
-        for (j = 0; j <= ZMALLOC_MAX_ALLOC_STAT; j++) {
-            size_t count = zmalloc_allocations_for_size(j);
-            if (count) {
-                if (info[sdslen(info)-1] != ':') info = sdscatlen(info,",",1);
-                info = sdscatprintf(info,"%s%d=%zu",
-                    (j == ZMALLOC_MAX_ALLOC_STAT) ? ">=" : "",
-                    j,count);
-            }
-        }
-        info = sdscat(info,"\r\n");
-    }
-
     /* Persistence */
     if (allsections || defsections || !strcasecmp(section,"persistence")) {
         if (sections++) info = sdscat(info,"\r\n");
@@ -1456,8 +1450,8 @@ sds genRedisInfoString(char *section) {
         "# CPU\r\n"
         "used_cpu_sys:%.2f\r\n"
         "used_cpu_user:%.2f\r\n"
-        "used_cpu_sys_childrens:%.2f\r\n"
-        "used_cpu_user_childrens:%.2f\r\n",
+        "used_cpu_sys_children:%.2f\r\n"
+        "used_cpu_user_children:%.2f\r\n",
         (float)self_ru.ru_utime.tv_sec+(float)self_ru.ru_utime.tv_usec/1000000,
         (float)self_ru.ru_stime.tv_sec+(float)self_ru.ru_stime.tv_usec/1000000,
         (float)c_ru.ru_utime.tv_sec+(float)c_ru.ru_utime.tv_usec/1000000,
diff --git a/src/redis.h b/src/redis.h
index 9775e2984..1d094c1d7 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -21,17 +21,17 @@
 #include <netinet/in.h>
 #include <lua.h>
 
-#include "ae.h"     /* Event driven programming library */
-#include "sds.h"    /* Dynamic safe strings */
-#include "dict.h"   /* Hash tables */
-#include "adlist.h" /* Linked lists */
+#include "ae.h"      /* Event driven programming library */
+#include "sds.h"     /* Dynamic safe strings */
+#include "dict.h"    /* Hash tables */
+#include "adlist.h"  /* Linked lists */
 #include "zmalloc.h" /* total memory usage aware version of malloc/free */
-#include "anet.h"   /* Networking the easy way */
-#include "zipmap.h" /* Compact string -> string data structure */
+#include "anet.h"    /* Networking the easy way */
+#include "zipmap.h"  /* Compact string -> string data structure */
 #include "ziplist.h" /* Compact list data structure */
-#include "intset.h" /* Compact integer set structure */
-#include "version.h"
-#include "util.h"
+#include "intset.h"  /* Compact integer set structure */
+#include "version.h" /* Version macro */
+#include "util.h"    /* Misc functions useful in many places */
 
 /* Error codes */
 #define REDIS_OK                0
@@ -53,6 +53,8 @@
 #define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */
 #define REDIS_AUTO_AOFREWRITE_PERC  100
 #define REDIS_AUTO_AOFREWRITE_MIN_SIZE (1024*1024)
+#define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
+#define REDIS_SLOWLOG_MAX_LEN 64
 
 /* Hash table parameters */
 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
@@ -312,6 +314,7 @@ typedef struct redisClient {
     sds querybuf;
     int argc;
     robj **argv;
+    struct redisCommand *cmd;
     int reqtype;
     int multibulklen;       /* number of multi bulk arguments left to read */
     long bulklen;           /* length of bulk argument in multi bulk request */
@@ -530,6 +533,10 @@ struct redisServer {
     long long stat_keyspace_misses; /* number of failed lookups of keys */
     size_t stat_peak_memory;        /* max used memory record */
     long long stat_fork_time;       /* time needed to perform latets fork() */
+    list *slowlog;
+    long long slowlog_entry_id;
+    long long slowlog_log_slower_than;
+    unsigned long slowlog_max_len;
     /* Configuration */
     int verbosity;
     int maxidletime;
@@ -807,7 +814,7 @@ void popGenericCommand(redisClient *c, int where);
 void unwatchAllKeys(redisClient *c);
 void initClientMultiState(redisClient *c);
 void freeClientMultiState(redisClient *c);
-void queueMultiCommand(redisClient *c, struct redisCommand *cmd);
+void queueMultiCommand(redisClient *c);
 void touchWatchedKey(redisDb *db, robj *key);
 void touchWatchedKeysOnFlush(int dbid);
 
@@ -918,7 +925,7 @@ int processCommand(redisClient *c);
 void setupSignalHandlers(void);
 struct redisCommand *lookupCommand(sds name);
 struct redisCommand *lookupCommandByCString(char *s);
-void call(redisClient *c, struct redisCommand *cmd);
+void call(redisClient *c);
 int prepareForShutdown();
 void redisLog(int level, const char *fmt, ...);
 void redisLogRaw(int level, const char *msg);
diff --git a/src/slowlog.c b/src/slowlog.c
new file mode 100644
index 000000000..cfd66dc63
--- /dev/null
+++ b/src/slowlog.c
@@ -0,0 +1,115 @@
+#include "redis.h"
+#include "slowlog.h"
+
+/* Slowlog implements a system that is able to remember the latest N
+ * queries that took more than M microseconds to execute.
+ *
+ * The execution time to reach to be logged in the slow log is set
+ * using the 'slowlog-log-slower-than' config directive, that is also
+ * readable and writable using the CONFIG SET/GET command.
+ *
+ * The slow queries log is actually not "logged" in the Redis log file
+ * but is accessible thanks to the SLOWLOG command. */
+
+/* Create a new slowlog entry.
+ * Incrementing the ref count of all the objects retained is up to
+ * this function. */
+slowlogEntry *slowlogCreateEntry(robj **argv, int argc, long long duration) {
+    slowlogEntry *se = zmalloc(sizeof(*se));
+    int j;
+
+    se->argc = argc;
+    se->argv = zmalloc(sizeof(robj*)*argc);
+    for (j = 0; j < argc; j++) {
+        se->argv[j] = argv[j];
+        incrRefCount(argv[j]);
+    }
+    se->time = time(NULL);
+    se->duration = duration;
+    se->id = server.slowlog_entry_id++;
+    return se;
+}
+
+/* Free a slow log entry. The argument is void so that the prototype of this
+ * function matches the one of the 'free' method of adlist.c.
+ *
+ * This function will take care to release all the retained object. */
+void slowlogFreeEntry(void *septr) {
+    slowlogEntry *se = septr;
+    int j;
+
+    for (j = 0; j < se->argc; j++)
+        decrRefCount(se->argv[j]);
+    zfree(se->argv);
+    zfree(se);
+}
+
+/* Initialize the slow log. This function should be called a single time
+ * at server startup. */
+void slowlogInit(void) {
+    server.slowlog = listCreate();
+    server.slowlog_entry_id = 0;
+    listSetFreeMethod(server.slowlog,slowlogFreeEntry);
+}
+
+/* Push a new entry into the slow log.
+ * This function will make sure to trim the slow log accordingly to the
+ * configured max length. */
+void slowlogPushEntryIfNeeded(robj **argv, int argc, long long duration) {
+    if (server.slowlog_log_slower_than < 0) return; /* Slowlog disabled */
+    if (duration >= server.slowlog_log_slower_than)
+        listAddNodeHead(server.slowlog,slowlogCreateEntry(argv,argc,duration));
+
+    /* Remove old entries if needed. */
+    while (listLength(server.slowlog) > server.slowlog_max_len)
+        listDelNode(server.slowlog,listLast(server.slowlog));
+}
+
+/* Remove all the entries from the current slow log. */
+void slowlogReset(void) {
+    while (listLength(server.slowlog) > 0)
+        listDelNode(server.slowlog,listLast(server.slowlog));
+}
+
+/* The SLOWLOG command. Implements all the subcommands needed to handle the
+ * Redis slow log. */
+void slowlogCommand(redisClient *c) {
+    if (c->argc == 2 && !strcasecmp(c->argv[1]->ptr,"reset")) {
+        slowlogReset();
+        addReply(c,shared.ok);
+    } else if (c->argc == 2 && !strcasecmp(c->argv[1]->ptr,"len")) {
+        addReplyLongLong(c,listLength(server.slowlog));
+    } else if ((c->argc == 2 || c->argc == 3) &&
+               !strcasecmp(c->argv[1]->ptr,"get"))
+    {
+        long count = 10, sent = 0;
+        listIter li;
+        void *totentries;
+        listNode *ln;
+        slowlogEntry *se;
+
+        if (c->argc == 3 &&
+            getLongFromObjectOrReply(c,c->argv[2],&count,NULL) != REDIS_OK)
+            return;
+
+        listRewind(server.slowlog,&li);
+        totentries = addDeferredMultiBulkLength(c);
+        while(count-- && (ln = listNext(&li))) {
+            int j;
+
+            se = ln->value;
+            addReplyMultiBulkLen(c,4);
+            addReplyLongLong(c,se->id);
+            addReplyLongLong(c,se->time);
+            addReplyLongLong(c,se->duration);
+            addReplyMultiBulkLen(c,se->argc);
+            for (j = 0; j < se->argc; j++)
+                addReplyBulk(c,se->argv[j]);
+            sent++;
+        }
+        setDeferredMultiBulkLength(c,totentries,sent);
+    } else {
+        addReplyError(c,
+            "Unknown SLOWLOG subcommand or wrong # of args. Try GET, RESET, LEN.");
+    }
+}
diff --git a/src/slowlog.h b/src/slowlog.h
new file mode 100644
index 000000000..bad770db4
--- /dev/null
+++ b/src/slowlog.h
@@ -0,0 +1,15 @@
+/* This structure defines an entry inside the slow log list */
+typedef struct slowlogEntry {
+    robj **argv;
+    int argc;
+    long long id;       /* Unique entry identifier. */
+    long long duration; /* Time spent by the query, in nanoseconds. */
+    time_t time;        /* Unix time at which the query was executed. */
+} slowlogEntry;
+
+/* Exported API */
+void slowlogInit(void);
+void slowlogPushEntryIfNeeded(robj **argv, int argc, long long duration);
+
+/* Exported commands */
+void slowlogCommand(redisClient *c);
diff --git a/src/t_list.c b/src/t_list.c
index d88277261..5427293f9 100644
--- a/src/t_list.c
+++ b/src/t_list.c
@@ -910,6 +910,7 @@ void blockingPopGenericCommand(redisClient *c, int where) {
                 if (listTypeLength(o) != 0) {
                     /* If the list contains elements fall back to the usual
                      * non-blocking POP operation */
+                    struct redisCommand *orig_cmd;
                     robj *argv[2], **orig_argv;
                     int orig_argc;
 
@@ -917,6 +918,7 @@ void blockingPopGenericCommand(redisClient *c, int where) {
                      * popGenericCommand() as the command takes a single key. */
                     orig_argv = c->argv;
                     orig_argc = c->argc;
+                    orig_cmd = c->cmd;
                     argv[1] = c->argv[j];
                     c->argv = argv;
                     c->argc = 2;
@@ -934,6 +936,7 @@ void blockingPopGenericCommand(redisClient *c, int where) {
                     /* Fix the client structure with the original stuff */
                     c->argv = orig_argv;
                     c->argc = orig_argc;
+                    c->cmd = orig_cmd;
 
                     return;
                 }
diff --git a/src/valgrind.sup b/src/valgrind.sup
index 7ba757548..3024d63bc 100644
--- a/src/valgrind.sup
+++ b/src/valgrind.sup
@@ -3,3 +3,15 @@
    Memcheck:Cond
    fun:lzf_compress
 }
+
+{
+   <lzf_unitialized_hash_table>
+   Memcheck:Value4
+   fun:lzf_compress
+}
+
+{
+   <lzf_unitialized_hash_table>
+   Memcheck:Value8
+   fun:lzf_compress
+}
diff --git a/src/zmalloc.c b/src/zmalloc.c
index 428951a46..5408c2faf 100644
--- a/src/zmalloc.c
+++ b/src/zmalloc.c
@@ -60,16 +60,13 @@
 
 #define update_zmalloc_stat_alloc(__n,__size) do { \
     size_t _n = (__n); \
-    size_t _stat_slot = (__size < ZMALLOC_MAX_ALLOC_STAT) ? __size : ZMALLOC_MAX_ALLOC_STAT; \
     if (_n&(sizeof(long)-1)) _n += sizeof(long)-(_n&(sizeof(long)-1)); \
     if (zmalloc_thread_safe) { \
         pthread_mutex_lock(&used_memory_mutex);  \
         used_memory += _n; \
-        zmalloc_allocations[_stat_slot]++; \
         pthread_mutex_unlock(&used_memory_mutex); \
     } else { \
         used_memory += _n; \
-        zmalloc_allocations[_stat_slot]++; \
     } \
 } while(0)
 
@@ -88,8 +85,6 @@
 static size_t used_memory = 0;
 static int zmalloc_thread_safe = 0;
 pthread_mutex_t used_memory_mutex = PTHREAD_MUTEX_INITIALIZER;
-/* Note that malloc_allocations elements are initialized to zero by C */
-size_t zmalloc_allocations[ZMALLOC_MAX_ALLOC_STAT+1];
 
 static void zmalloc_oom(size_t size) {
     fprintf(stderr, "zmalloc: Out of memory trying to allocate %zu bytes\n",
@@ -190,11 +185,6 @@ size_t zmalloc_used_memory(void) {
     return um;
 }
 
-size_t zmalloc_allocations_for_size(size_t size) {
-    if (size > ZMALLOC_MAX_ALLOC_STAT) return 0;
-    return zmalloc_allocations[size];
-}
-
 void zmalloc_enable_thread_safeness(void) {
     zmalloc_thread_safe = 1;
 }
diff --git a/src/zmalloc.h b/src/zmalloc.h
index 49792795f..7ee556a37 100644
--- a/src/zmalloc.h
+++ b/src/zmalloc.h
@@ -75,8 +75,5 @@ size_t zmalloc_used_memory(void);
 void zmalloc_enable_thread_safeness(void);
 float zmalloc_get_fragmentation_ratio(void);
 size_t zmalloc_get_rss(void);
-size_t zmalloc_allocations_for_size(size_t size);
-
-#define ZMALLOC_MAX_ALLOC_STAT 256
 
 #endif /* __ZMALLOC_H */
diff --git a/tests/integration/aof.tcl b/tests/integration/aof.tcl
index 927969b62..a554f9ef1 100644
--- a/tests/integration/aof.tcl
+++ b/tests/integration/aof.tcl
@@ -32,6 +32,7 @@ tags {"aof"} {
 
     start_server_aof [list dir $server_path] {
         test "Unfinished MULTI: Server should not have been started" {
+            if {$::valgrind} {after 2000}
             assert_equal 0 [is_alive $srv]
         }
 
@@ -49,6 +50,7 @@ tags {"aof"} {
 
     start_server_aof [list dir $server_path] {
         test "Short read: Server should not have been started" {
+            if {$::valgrind} {after 2000}
             assert_equal 0 [is_alive $srv]
         }
 
@@ -101,4 +103,29 @@ tags {"aof"} {
             assert_equal 1 [$client scard set]
         }
     }
+
+    ## Test that EXPIREAT is loaded correctly
+    create_aof {
+        append_to_aof [formatCommand rpush list foo]
+        append_to_aof [formatCommand expireat list 1000]
+        append_to_aof [formatCommand rpush list bar]
+    }
+
+    start_server_aof [list dir $server_path] {
+        test "AOF+EXPIRE: Server should have been started" {
+            assert_equal 1 [is_alive $srv]
+        }
+
+        test "AOF+EXPIRE: List should be empty" {
+            set client [redis [dict get $srv host] [dict get $srv port]]
+            assert_equal 0 [$client llen list]
+        }
+    }
+
+    start_server {overrides {appendonly {yes} appendfilename {appendonly.aof}}} {
+        test {Redis should not try to convert DEL into EXPIREAT for EXPIRE -1} {
+            r set x 10
+            r expire x -1
+        }
+    }
 }
diff --git a/tests/integration/replication-2.tcl b/tests/integration/replication-2.tcl
new file mode 100644
index 000000000..5450bdd85
--- /dev/null
+++ b/tests/integration/replication-2.tcl
@@ -0,0 +1,27 @@
+start_server {tags {"repl"}} {
+    start_server {} {
+        test {First server should have role slave after SLAVEOF} {
+            r -1 slaveof [srv 0 host] [srv 0 port]
+            after 1000
+            s -1 role
+        } {slave}
+
+        test {MASTER and SLAVE dataset should be identical after complex ops} {
+            createComplexDataset r 10000
+            after 500
+            if {[r debug digest] ne [r -1 debug digest]} {
+                set csv1 [csvdump r]
+                set csv2 [csvdump {r -1}]
+                set fd [open /tmp/repldump1.txt w]
+                puts -nonewline $fd $csv1
+                close $fd
+                set fd [open /tmp/repldump2.txt w]
+                puts -nonewline $fd $csv2
+                close $fd
+                puts "Master - Slave inconsistency"
+                puts "Run diff -u against /tmp/repldump*.txt for more info"
+            }
+            assert_equal [r debug digest] [r -1 debug digest]
+        }
+    }
+}
diff --git a/tests/integration/replication-3.tcl b/tests/integration/replication-3.tcl
new file mode 100644
index 000000000..e660bf4e5
--- /dev/null
+++ b/tests/integration/replication-3.tcl
@@ -0,0 +1,31 @@
+start_server {tags {"repl"}} {
+    start_server {} {
+        test {First server should have role slave after SLAVEOF} {
+            r -1 slaveof [srv 0 host] [srv 0 port]
+            after 1000
+            s -1 role
+        } {slave}
+
+        if {$::accurate} {set numops 50000} else {set numops 5000}
+
+        test {MASTER and SLAVE consistency with expire} {
+            createComplexDataset r $numops useexpire
+            after 4000 ;# Make sure everything expired before taking the digest
+            r keys *   ;# Force DEL syntesizing to slave
+            after 1000 ;# Wait another second. Now everything should be fine.
+            if {[r debug digest] ne [r -1 debug digest]} {
+                set csv1 [csvdump r]
+                set csv2 [csvdump {r -1}]
+                set fd [open /tmp/repldump1.txt w]
+                puts -nonewline $fd $csv1
+                close $fd
+                set fd [open /tmp/repldump2.txt w]
+                puts -nonewline $fd $csv2
+                close $fd
+                puts "Master - Slave inconsistency"
+                puts "Run diff -u against /tmp/repldump*.txt for more info"
+            }
+            assert_equal [r debug digest] [r -1 debug digest]
+        }
+    }
+}
diff --git a/tests/integration/replication.tcl b/tests/integration/replication.tcl
index 227356b24..0a1cd409f 100644
--- a/tests/integration/replication.tcl
+++ b/tests/integration/replication.tcl
@@ -23,44 +23,6 @@ start_server {tags {"repl"}} {
             after 1000
             assert_equal [r debug digest] [r -1 debug digest]
         }
-
-        test {MASTER and SLAVE dataset should be identical after complex ops} {
-            createComplexDataset r 10000
-            after 500
-            if {[r debug digest] ne [r -1 debug digest]} {
-                set csv1 [csvdump r]
-                set csv2 [csvdump {r -1}]
-                set fd [open /tmp/repldump1.txt w]
-                puts -nonewline $fd $csv1
-                close $fd
-                set fd [open /tmp/repldump2.txt w]
-                puts -nonewline $fd $csv2
-                close $fd
-                puts "Master - Slave inconsistency"
-                puts "Run diff -u against /tmp/repldump*.txt for more info"
-            }
-            assert_equal [r debug digest] [r -1 debug digest]
-        }
-
-        test {MASTER and SLAVE consistency with expire} {
-            createComplexDataset r 50000 useexpire
-            after 4000 ;# Make sure everything expired before taking the digest
-            r keys *   ;# Force DEL syntesizing to slave
-            after 1000 ;# Wait another second. Now everything should be fine.
-            if {[r debug digest] ne [r -1 debug digest]} {
-                set csv1 [csvdump r]
-                set csv2 [csvdump {r -1}]
-                set fd [open /tmp/repldump1.txt w]
-                puts -nonewline $fd $csv1
-                close $fd
-                set fd [open /tmp/repldump2.txt w]
-                puts -nonewline $fd $csv2
-                close $fd
-                puts "Master - Slave inconsistency"
-                puts "Run diff -u against /tmp/repldump*.txt for more info"
-            }
-            assert_equal [r debug digest] [r -1 debug digest]
-        }
     }
 }
 
@@ -92,6 +54,7 @@ start_server {tags {"repl"}} {
         
         test {SET on the master should immediately propagate} {
             r -1 set mykey bar
+            if {$::valgrind} {after 2000}
             r  0 get mykey
         } {bar}
     }
diff --git a/tests/support/server.tcl b/tests/support/server.tcl
index c92754611..3fa1725f3 100644
--- a/tests/support/server.tcl
+++ b/tests/support/server.tcl
@@ -1,5 +1,6 @@
 set ::global_overrides {}
 set ::tags {}
+set ::valgrind_errors {}
 
 proc error_and_quit {config_file error} {
     puts "!!COULD NOT START REDIS-SERVER\n"
@@ -16,11 +17,9 @@ proc check_valgrind_errors stderr {
     close $fd
 
     if {![regexp -- {ERROR SUMMARY: 0 errors} $buf] ||
-        ![regexp -- {definitely lost: 0 bytes} $buf]} {
-        puts "*** VALGRIND ERRORS ***"
-        puts $buf
-        puts "--- press enter to continue ---"
-        gets stdin
+        (![regexp -- {definitely lost: 0 bytes} $buf] &&
+         ![regexp -- {no leaks are possible} $buf])} {
+        send_data_packet $::test_server_fd err "Valgrind error: $buf\n"
     }
 }
 
@@ -182,7 +181,7 @@ proc start_server {options {code undefined}} {
     
     # check that the server actually started
     # ugly but tries to be as fast as possible...
-    set retrynum 20
+    set retrynum 100
     set serverisup 0
 
     if {$::verbose} {
diff --git a/tests/support/test.tcl b/tests/support/test.tcl
index a6199f4bd..4e68905a5 100644
--- a/tests/support/test.tcl
+++ b/tests/support/test.tcl
@@ -49,60 +49,28 @@ proc color_term {} {
     expr {[info exists ::env(TERM)] && [string match *xterm* $::env(TERM)]}
 }
 
-# This is called before starting the test
-proc announce_test {s} {
+proc colorstr {color str} {
     if {[color_term]} {
-        puts -nonewline "$s\033\[0K"
-        flush stdout
-        set ::backward_count [string length $s]
-    }
-}
-
-# This is called after the test finished
-proc colored_dot {tags passed} {
-    if {[color_term]} {
-        # Go backward and delete what announc_test function printed.
-        puts -nonewline "\033\[${::backward_count}D\033\[0K\033\[J"
-
-        # Print a coloured char, accordingly to test outcome and tags.
-        if {[lsearch $tags list] != -1} {
-            set colorcode {31}
-            set ch L
-        } elseif {[lsearch $tags hash] != -1} {
-            set colorcode {32}
-            set ch H
-        } elseif {[lsearch $tags set] != -1} {
-            set colorcode {33}
-            set ch S
-        } elseif {[lsearch $tags zset] != -1} {
-            set colorcode {34}
-            set ch Z
-        } elseif {[lsearch $tags basic] != -1} {
-            set colorcode {35}
-            set ch B
-        } elseif {[lsearch $tags scripting] != -1} {
-            set colorcode {36}
-            set ch X
-        } else {
-            set colorcode {37}
-            set ch .
+        set b 0
+        if {[string range $color 0 4] eq {bold-}} {
+            set b 1
+            set color [string range $color 5 end]
+        }
+        switch $color {
+            red {set colorcode {31}}
+            green {set colorcode {32}}
+            yellow {set colorcode {33}}
+            blue {set colorcode {34}}
+            magenta {set colorcode {35}}
+            cyan {set colorcode {36}}
+            white {set colorcode {37}}
+            default {set colorcode {37}}
         }
         if {$colorcode ne {}} {
-            if {$passed} {
-                puts -nonewline "\033\[0;${colorcode};40m"
-            } else {
-                puts -nonewline "\033\[7;${colorcode};40m"
-            }
-            puts -nonewline $ch
-            puts -nonewline "\033\[0m"
-            flush stdout
+            return "\033\[$b;${colorcode};40m$str\033\[0m"
         }
     } else {
-        if {$passed} {
-            puts -nonewline .
-        } else {
-            puts -nonewline F
-        }
+        return $str
     }
 }
 
@@ -130,16 +98,9 @@ proc test {name code {okpattern undefined}} {
 
     incr ::num_tests
     set details {}
-    lappend details $::curfile
-    lappend details $::tags
-    lappend details $name
+    lappend details "$name in $::curfile"
 
-    if {$::verbose} {
-        puts -nonewline [format "#%03d %-68s " $::num_tests $name]
-        flush stdout
-    } else {
-        announce_test $name
-    }
+    send_data_packet $::test_server_fd testing $name
 
     if {[catch {set retval [uplevel 1 $code]} error]} {
         if {[string match "assertion:*" $error]} {
@@ -148,12 +109,7 @@ proc test {name code {okpattern undefined}} {
             lappend ::tests_failed $details
 
             incr ::num_failed
-            if {$::verbose} {
-                puts "FAILED"
-                puts "$msg\n"
-            } else {
-                colored_dot $::tags 0
-            }
+            send_data_packet $::test_server_fd err [join $details "\n"]
         } else {
             # Re-raise, let handler up the stack take care of this.
             error $error $::errorInfo
@@ -161,33 +117,21 @@ proc test {name code {okpattern undefined}} {
     } else {
         if {$okpattern eq "undefined" || $okpattern eq $retval || [string match $okpattern $retval]} {
             incr ::num_passed
-            if {$::verbose} {
-                puts "PASSED"
-            } else {
-                colored_dot $::tags 1
-            }
+            send_data_packet $::test_server_fd ok $name
         } else {
             set msg "Expected '$okpattern' to equal or match '$retval'"
             lappend details $msg
             lappend ::tests_failed $details
 
             incr ::num_failed
-            if {$::verbose} {
-                puts "FAILED"
-                puts "$msg\n"
-            } else {
-                colored_dot $::tags 0
-            }
+            send_data_packet $::test_server_fd err [join $details "\n"]
         }
     }
-    flush stdout
 
     if {$::traceleaks} {
         set output [exec leaks redis-server]
         if {![string match {*0 leaks*} $output]} {
-            puts "--- Test \"$name\" leaked! ---"
-            puts $output
-            exit 1
+            send_data_packet $::test_server_fd err "Detected a memory leak in test '$name': $output"
         }
     }
 }
diff --git a/tests/support/tmpfile.tcl b/tests/support/tmpfile.tcl
index 287b09317..809f58730 100644
--- a/tests/support/tmpfile.tcl
+++ b/tests/support/tmpfile.tcl
@@ -4,13 +4,7 @@ file mkdir $::tmproot
 
 # returns a dirname unique to this process to write to
 proc tmpdir {basename} {
-    if {$::diskstore} {
-        # For diskstore we want to use the same dir again and again
-        # otherwise everything is too slow.
-        set dir [file join $::tmproot $basename.diskstore]
-    } else {
-        set dir [file join $::tmproot $basename.[pid].[incr ::tmpcounter]]
-    }
+    set dir [file join $::tmproot $basename.[pid].[incr ::tmpcounter]]
     file mkdir $dir
     set _ $dir
 }
diff --git a/tests/test_helper.tcl b/tests/test_helper.tcl
index f505f26ae..559d02647 100644
--- a/tests/test_helper.tcl
+++ b/tests/test_helper.tcl
@@ -9,6 +9,33 @@ source tests/support/tmpfile.tcl
 source tests/support/test.tcl
 source tests/support/util.tcl
 
+set ::all_tests {
+    unit/printver
+    unit/auth
+    unit/protocol
+    unit/basic
+    unit/type/list
+    unit/type/list-2
+    unit/type/list-3
+    unit/type/set
+    unit/type/zset
+    unit/type/hash
+    unit/sort
+    unit/expire
+    unit/other
+    unit/cas
+    unit/quit
+    integration/replication
+    integration/replication-2
+    integration/replication-3
+    integration/aof
+    unit/pubsub
+    unit/slowlog
+    unit/scripting
+}
+# Index to the next test to run in the ::all_tests list.
+set ::next_test 0
+
 set ::host 127.0.0.1
 set ::port 16379
 set ::traceleaks 0
@@ -19,12 +46,22 @@ set ::allowtags {}
 set ::external 0; # If "1" this means, we are running against external instance
 set ::file ""; # If set, runs only the tests in this comma separated list
 set ::curfile ""; # Hold the filename of the current suite
-set ::diskstore 0; # Don't touch this by hand. The test itself will toggle it.
+set ::accurate 0; # If true runs fuzz tests with more iterations
+set ::force_failure 0
+
+# Set to 1 when we are running in client mode. The Redis test uses a
+# server-client model to run tests simultaneously. The server instance
+# runs the specified number of client instances that will actually run tests.
+# The server is responsible of showing the result to the user, and exit with
+# the appropriate exit code depending on the test outcome.
+set ::client 0
+set ::numclients 16
 
 proc execute_tests name {
     set path "tests/$name.tcl"
     set ::curfile $path
     source $path
+    send_data_packet $::test_server_fd done "$name"
 }
 
 # Setup a list to hold a stack of server configs. When calls to start_server
@@ -104,91 +141,189 @@ proc s {args} {
 }
 
 proc cleanup {} {
-    puts "Cleanup: warning may take some time..."
+    puts -nonewline "Cleanup: may take some time... "
+    flush stdout
     catch {exec rm -rf {*}[glob tests/tmp/redis.conf.*]}
     catch {exec rm -rf {*}[glob tests/tmp/server.*]}
+    puts "OK"
 }
 
-proc execute_everything {} {
-    if 0 {
-        # Use this when hacking on new tests.
-        set ::verbose 1
-        execute_tests "unit/first"
-        return
-    }
-
-    execute_tests "unit/printver"
-    execute_tests "unit/auth"
-    execute_tests "unit/protocol"
-    execute_tests "unit/basic"
-    execute_tests "unit/type/list"
-    execute_tests "unit/type/set"
-    execute_tests "unit/type/zset"
-    execute_tests "unit/type/hash"
-    execute_tests "unit/sort"
-    execute_tests "unit/expire"
-    execute_tests "unit/other"
-    execute_tests "unit/cas"
-    execute_tests "unit/quit"
-    execute_tests "integration/replication"
-    execute_tests "integration/aof"
-#    execute_tests "integration/redis-cli"
-    execute_tests "unit/pubsub"
-    execute_tests "unit/scripting"
-
-    return; # No diskstore tests for now...
-    # run tests with diskstore enabled
-    puts "\nRunning diskstore tests... this is slow, press Ctrl+C if not interested.."
-    set ::diskstore 1
-    lappend ::denytags nodiskstore
-    set ::global_overrides {diskstore-enabled yes}
-    execute_tests "unit/protocol"
-    execute_tests "unit/basic"
-    execute_tests "unit/type/list"
-    execute_tests "unit/type/set"
-    execute_tests "unit/type/zset"
-    execute_tests "unit/type/hash"
-    execute_tests "unit/sort"
-    execute_tests "unit/expire"
-    execute_tests "unit/other"
-    execute_tests "unit/cas"
-}
-
-proc main {} {
+proc test_server_main {} {
     cleanup
-
-    if {[string length $::file] > 0} {
-        foreach {file} [split $::file ,] {
-            execute_tests $file
-        }
-    } else {
-        execute_everything
-    }
-
-    cleanup
-    puts "\n[expr $::num_tests] tests, $::num_passed passed, $::num_failed failed\n"
-    if {$::num_failed > 0} {
-        set curheader ""
-        puts "Failures:"
-        foreach {test} $::tests_failed {
-            set header [lindex $test 0]
-            append header " ("
-            append header [join [lindex $test 1] ","]
-            append header ")"
-
-            if {$curheader ne $header} {
-                set curheader $header
-                puts "\n$curheader:"
+    # Open a listening socket, trying different ports in order to find a
+    # non busy one.
+    set port 11111
+    while 1 {
+        puts "Starting test server at port $port"
+        if {[catch {socket -server accept_test_clients $port} e]} {
+            if {[string match {*address already in use*} $e]} {
+                if {$port == 20000} {
+                    puts "Can't find an available TCP port for test server."
+                    exit 1
+                } else {
+                    incr port
+                }
+            } else {
+                puts "Fatal error starting test server: $e"
+                exit 1
             }
-
-            set name [lindex $test 2]
-            set msg [lindex $test 3]
-            puts "- $name: $msg"
+        } else {
+            break
         }
-
-        puts ""
-        exit 1
     }
+
+    # Start the client instances
+    set ::clients_pids {}
+    for {set j 0} {$j < $::numclients} {incr j} {
+        set p [exec tclsh8.5 [info script] {*}$::argv \
+            --client $port --port [expr {$::port+($j*10)}] &]
+        lappend ::clients_pids $p
+    }
+
+    # Setup global state for the test server
+    set ::idle_clients {}
+    set ::active_clients {}
+    array set ::clients_start_time {}
+    set ::clients_time_history {}
+    set ::failed_tests {}
+
+    # Enter the event loop to handle clients I/O
+    after 100 test_server_cron
+    vwait forever
+}
+
+# This function gets called 10 times per second, for now does nothing but
+# may be used in the future in order to detect test clients taking too much
+# time to execute the task.
+proc test_server_cron {} {
+}
+
+proc accept_test_clients {fd addr port} {
+    fileevent $fd readable [list read_from_test_client $fd]
+}
+
+# This is the readable handler of our test server. Clients send us messages
+# in the form of a status code such and additional data. Supported
+# status types are:
+#
+# ready: the client is ready to execute the command. Only sent at client
+#        startup. The server will queue the client FD in the list of idle
+#        clients.
+# testing: just used to signal that a given test started.
+# ok: a test was executed with success.
+# err: a test was executed with an error.
+# exception: there was a runtime exception while executing the test.
+# done: all the specified test file was processed, this test client is
+#       ready to accept a new task.
+proc read_from_test_client fd {
+    set bytes [gets $fd]
+    set payload [read $fd $bytes]
+    foreach {status data} $payload break
+    if {$status eq {ready}} {
+        puts "\[$status\]: $data"
+        signal_idle_client $fd
+    } elseif {$status eq {done}} {
+        set elapsed [expr {[clock seconds]-$::clients_start_time($fd)}]
+        puts "\[[colorstr yellow $status]\]: $data ($elapsed seconds)"
+        puts "+++ [expr {[llength $::active_clients]-1}] units still in execution."
+        lappend ::clients_time_history $elapsed $data
+        signal_idle_client $fd
+    } elseif {$status eq {ok}} {
+        puts "\[[colorstr green $status]\]: $data"
+    } elseif {$status eq {err}} {
+        set err "\[[colorstr red $status]\]: $data"
+        puts $err
+        lappend ::failed_tests $err
+    } elseif {$status eq {exception}} {
+        puts "\[[colorstr red $status]\]: $data"
+        foreach p $::clients_pids {
+            catch {exec kill -9 $p}
+        }
+        exit 1
+    } elseif {$status eq {testing}} {
+        # No op
+    } else {
+        puts "\[$status\]: $data"
+    }
+}
+
+# A new client is idle. Remove it from the list of active clients and
+# if there are still test units to run, launch them.
+proc signal_idle_client fd {
+    # Remove this fd from the list of active clients.
+    set ::active_clients \
+        [lsearch -all -inline -not -exact $::active_clients $fd]
+    # New unit to process?
+    if {$::next_test != [llength $::all_tests]} {
+        puts [colorstr bold-white "Testing [lindex $::all_tests $::next_test]"]
+        set ::clients_start_time($fd) [clock seconds]
+        send_data_packet $fd run [lindex $::all_tests $::next_test]
+        lappend ::active_clients $fd
+        incr ::next_test
+    } else {
+        lappend ::idle_clients $fd
+        if {[llength $::active_clients] == 0} {
+            the_end
+        }
+    }
+}
+
+# The the_end funciton gets called when all the test units were already
+# executed, so the test finished.
+proc the_end {} {
+    # TODO: print the status, exit with the rigth exit code.
+    puts "\n                   The End\n"
+    puts "Execution time of different units:"
+    foreach {time name} $::clients_time_history {
+        puts "  $time seconds - $name"
+    }
+    if {[llength $::failed_tests]} {
+        puts "\n[colorstr bold-red {!!! WARNING}] The following tests failed:\n"
+        foreach failed $::failed_tests {
+            puts "*** $failed"
+        }
+        cleanup
+        exit 1
+    } else {
+        puts "\n[colorstr bold-white {\o/}] [colorstr bold-green {All tests passed without errors!}]\n"
+        cleanup
+        exit 0
+    }
+}
+
+# The client is not even driven (the test server is instead) as we just need
+# to read the command, execute, reply... all this in a loop.
+proc test_client_main server_port {
+    set ::test_server_fd [socket localhost $server_port]
+    send_data_packet $::test_server_fd ready [pid]
+    while 1 {
+        set bytes [gets $::test_server_fd]
+        set payload [read $::test_server_fd $bytes]
+        foreach {cmd data} $payload break
+        if {$cmd eq {run}} {
+            execute_tests $data
+        } else {
+            error "Unknown test client command: $cmd"
+        }
+    }
+}
+
+proc send_data_packet {fd status data} {
+    set payload [list $status $data]
+    puts $fd [string length $payload]
+    puts -nonewline $fd $payload
+    flush $fd
+}
+
+proc print_help_screen {} {
+    puts [join {
+        "--valgrind         Run the test over valgrind."
+        "--accurate         Run slow randomized tests for more iterations."
+        "--single <unit>    Just execute the specified unit (see next option)."
+        "--list-tests       List all the available test units."
+        "--force-failure    Force the execution of a test that always fails."
+        "--help             Print this help screen."
+    } "\n"]
 }
 
 # parse arguments
@@ -206,9 +341,6 @@ for {set j 0} {$j < [llength $argv]} {incr j} {
         incr j
     } elseif {$opt eq {--valgrind}} {
         set ::valgrind 1
-    } elseif {$opt eq {--file}} {
-        set ::file $arg
-        incr j
     } elseif {$opt eq {--host}} {
         set ::external 1
         set ::host $arg
@@ -216,20 +348,47 @@ for {set j 0} {$j < [llength $argv]} {incr j} {
     } elseif {$opt eq {--port}} {
         set ::port $arg
         incr j
-    } elseif {$opt eq {--verbose}} {
-        set ::verbose 1
+    } elseif {$opt eq {--accurate}} {
+        set ::accurate 1
+    } elseif {$opt eq {--force-failure}} {
+        set ::force_failure 1
+    } elseif {$opt eq {--single}} {
+        set ::all_tests $arg
+        incr j
+    } elseif {$opt eq {--list-tests}} {
+        foreach t $::all_tests {
+            puts $t
+        }
+        exit 0
+    } elseif {$opt eq {--client}} {
+        set ::client 1
+        set ::test_server_port $arg
+        incr j
+    } elseif {$opt eq {--help}} {
+        print_help_screen
+        exit 0
     } else {
         puts "Wrong argument: $opt"
         exit 1
     }
 }
 
-if {[catch { main } err]} {
-    if {[string length $err] > 0} {
-        # only display error when not generated by the test suite
-        if {$err ne "exception"} {
-            puts $::errorInfo
+if {$::client} {
+    if {[catch { test_client_main $::test_server_port } err]} {
+        set estr "Executing test client: $err.\n$::errorInfo"
+        if {[catch {send_data_packet $::test_server_fd exception $estr}]} {
+            puts $estr
         }
         exit 1
     }
+} else {
+    if {[catch { test_server_main } err]} {
+        if {[string length $err] > 0} {
+            # only display error when not generated by the test suite
+            if {$err ne "exception"} {
+                puts $::errorInfo
+            }
+            exit 1
+        }
+    }
 }
diff --git a/tests/unit/expire.tcl b/tests/unit/expire.tcl
index 6f16ed589..415a0f538 100644
--- a/tests/unit/expire.tcl
+++ b/tests/unit/expire.tcl
@@ -7,7 +7,7 @@ start_server {tags {"expire"}} {
         set v4 [r ttl x]
         r expire x 4
         list $v1 $v2 $v3 $v4
-    } {1 5 1 10}
+    } {1 [45] 1 10}
 
     test {EXPIRE - It should be still possible to read 'x'} {
         r get x
diff --git a/tests/unit/other.tcl b/tests/unit/other.tcl
index 716d6897a..702c291f9 100644
--- a/tests/unit/other.tcl
+++ b/tests/unit/other.tcl
@@ -1,4 +1,11 @@
 start_server {tags {"other"}} {
+    if {$::force_failure} {
+        # This is used just for test suite development purposes.
+        test {Failing test} {
+            format err
+        } {ok}
+    }
+
     test {SAVE - make sure there are all the types as values} {
         # Wait for a background saving in progress to terminate
         waitForBgsave r
@@ -12,11 +19,12 @@ start_server {tags {"other"}} {
         r save
     } {OK}
 
-    tags {slow nodiskstore} {
+    tags {slow} {
+        if {$::accurate} {set iterations 10000} else {set iterations 1000}
         foreach fuzztype {binary alpha compr} {
             test "FUZZ stresser with data model $fuzztype" {
                 set err 0
-                for {set i 0} {$i < 10000} {incr i} {
+                for {set i 0} {$i < $iterations} {incr i} {
                     set fuzz [randstring 0 512 $fuzztype]
                     r set foo $fuzz
                     set got [r get foo]
@@ -46,11 +54,12 @@ start_server {tags {"other"}} {
         set _ $err
     } {*invalid*}
 
-    tags {consistency nodiskstore} {
+    tags {consistency} {
         if {![catch {package require sha1}]} {
+            if {$::accurate} {set numops 10000} else {set numops 1000}
             test {Check consistency of different data types after a reload} {
                 r flushdb
-                createComplexDataset r 10000
+                createComplexDataset r $numops
                 set dump [csvdump r]
                 set sha1 [r debug digest]
                 r debug reload
@@ -102,25 +111,19 @@ start_server {tags {"other"}} {
         r flushdb
         r set x 10
         r expire x 1000
-        if {$::diskstore} {
-            r debug flushcache
-        } else {
-            r save
-            r debug reload
-        }
+        r save
+        r debug reload
         set ttl [r ttl x]
         set e1 [expr {$ttl > 900 && $ttl <= 1000}]
-        if {!$::diskstore} {
-            r bgrewriteaof
-            waitForBgrewriteaof r
-            r debug loadaof
-        }
+        r bgrewriteaof
+        waitForBgrewriteaof r
+        r debug loadaof
         set ttl [r ttl x]
         set e2 [expr {$ttl > 900 && $ttl <= 1000}]
         list $e1 $e2
     } {1 1}
 
-    tags {protocol nodiskstore} {
+    tags {protocol} {
         test {PIPELINING stresser (also a regression for the old epoll bug)} {
             set fd2 [socket $::host $::port]
             fconfigure $fd2 -encoding binary -translation binary
@@ -244,6 +247,7 @@ start_server {tags {"other"}} {
     } {0 0}
 
     test {Perform a final SAVE to leave a clean DB on disk} {
+        waitForBgsave r
         r save
     } {OK}
 }
diff --git a/tests/unit/slowlog.tcl b/tests/unit/slowlog.tcl
new file mode 100644
index 000000000..55a71e985
--- /dev/null
+++ b/tests/unit/slowlog.tcl
@@ -0,0 +1,41 @@
+start_server {tags {"slowlog"} overrides {slowlog-log-slower-than 1000000}} {
+    test {SLOWLOG - check that it starts with an empty log} {
+        r slowlog len
+    } {0}
+
+    test {SLOWLOG - only logs commands taking more time than specified} {
+        r config set slowlog-log-slower-than 100000
+        r ping
+        assert_equal [r slowlog len] 0
+        r debug sleep 0.2
+        assert_equal [r slowlog len] 1
+    }
+
+    test {SLOWLOG - max entries is correctly handled} {
+        r config set slowlog-log-slower-than 0
+        r config set slowlog-max-len 10
+        for {set i 0} {$i < 100} {incr i} {
+            r ping
+        }
+        r slowlog len
+    } {10}
+
+    test {SLOWLOG - GET optional argument to limit output len works} {
+        llength [r slowlog get 5]
+    } {5}
+
+    test {SLOWLOG - RESET subcommand works} {
+        r config set slowlog-log-slower-than 100000
+        r slowlog reset
+        r slowlog len
+    } {0}
+
+    test {SLOWLOG - logged entry sanity check} {
+        r debug sleep 0.2
+        set e [lindex [r slowlog get] 0]
+        assert_equal [llength $e] 4
+        assert_equal [lindex $e 0] 105
+        assert_equal [expr {[lindex $e 2] > 100000}] 1
+        assert_equal [lindex $e 3] {debug sleep 0.2}
+    }
+}
diff --git a/tests/unit/type/list-2.tcl b/tests/unit/type/list-2.tcl
new file mode 100644
index 000000000..bf6a055eb
--- /dev/null
+++ b/tests/unit/type/list-2.tcl
@@ -0,0 +1,44 @@
+start_server {
+    tags {"list"}
+    overrides {
+        "list-max-ziplist-value" 16
+        "list-max-ziplist-entries" 256
+    }
+} {
+    source "tests/unit/type/list-common.tcl"
+
+    foreach {type large} [array get largevalue] {
+        tags {"slow"} {
+            test "LTRIM stress testing - $type" {
+                set mylist {}
+                set startlen 32
+                r del mylist
+
+                # Start with the large value to ensure the
+                # right encoding is used.
+                r rpush mylist $large
+                lappend mylist $large
+
+                for {set i 0} {$i < $startlen} {incr i} {
+                    set str [randomInt 9223372036854775807]
+                    r rpush mylist $str
+                    lappend mylist $str
+                }
+
+                for {set i 0} {$i < 1000} {incr i} {
+                    set min [expr {int(rand()*$startlen)}]
+                    set max [expr {$min+int(rand()*$startlen)}]
+                    set mylist [lrange $mylist $min $max]
+                    r ltrim mylist $min $max
+                    assert_equal $mylist [r lrange mylist 0 -1]
+
+                    for {set j [r llen mylist]} {$j < $startlen} {incr j} {
+                        set str [randomInt 9223372036854775807]
+                        r rpush mylist $str
+                        lappend mylist $str
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/tests/unit/type/list-3.tcl b/tests/unit/type/list-3.tcl
new file mode 100644
index 000000000..9410022fd
--- /dev/null
+++ b/tests/unit/type/list-3.tcl
@@ -0,0 +1,70 @@
+start_server {
+    tags {list ziplist}
+    overrides {
+        "list-max-ziplist-value" 200000
+        "list-max-ziplist-entries" 256
+    }
+} {
+    test {Explicit regression for a list bug} {
+        set mylist {49376042582 {BkG2o\pIC]4YYJa9cJ4GWZalG[4tin;1D2whSkCOW`mX;SFXGyS8sedcff3fQI^tgPCC@^Nu1J6o]meM@Lko]t_jRyo<xSJ1oObDYd`ppZuW6P@fS278YaOx=s6lvdFlMbP0[SbkI^Kr\HBXtuFaA^mDx:yzS4a[skiiPWhT<nNfAf=aQVfclcuwDrfe;iVuKdNvB9kbfq>tK?tH[\EvWqS]b`o2OCtjg:?nUTwdjpcUm]y:pg5q24q7LlCOwQE^}}
+        r del l
+        r rpush l [lindex $mylist 0]
+        r rpush l [lindex $mylist 1]
+        assert_equal [r lindex l 0] [lindex $mylist 0]
+        assert_equal [r lindex l 1] [lindex $mylist 1]
+    }
+
+    tags {slow} {
+        test {ziplist implementation: value encoding and backlink} {
+            if {$::accurate} {set iterations 100} else {set iterations 10}
+            for {set j 0} {$j < $iterations} {incr j} {
+                r del l
+                set l {}
+                for {set i 0} {$i < 200} {incr i} {
+                    randpath {
+                        set data [string repeat x [randomInt 100000]]
+                    } {
+                        set data [randomInt 65536]
+                    } {
+                        set data [randomInt 4294967296]
+                    } {
+                        set data [randomInt 18446744073709551616]
+                    }
+                    lappend l $data
+                    r rpush l $data
+                }
+                assert_equal [llength $l] [r llen l]
+                # Traverse backward
+                for {set i 199} {$i >= 0} {incr i -1} {
+                    if {[lindex $l $i] ne [r lindex l $i]} {
+                        assert_equal [lindex $l $i] [r lindex l $i]
+                    }
+                }
+            }
+        }
+
+        test {ziplist implementation: encoding stress testing} {
+            for {set j 0} {$j < 200} {incr j} {
+                r del l
+                set l {}
+                set len [randomInt 400]
+                for {set i 0} {$i < $len} {incr i} {
+                    set rv [randomValue]
+                    randpath {
+                        lappend l $rv
+                        r rpush l $rv
+                    } {
+                        set l [concat [list $rv] $l]
+                        r lpush l $rv
+                    }
+                }
+                assert_equal [llength $l] [r llen l]
+                for {set i 0} {$i < $len} {incr i} {
+                    if {[lindex $l $i] ne [r lindex l $i]} {
+                        assert_equal [lindex $l $i] [r lindex l $i]
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/tests/unit/type/list-common.tcl b/tests/unit/type/list-common.tcl
new file mode 100644
index 000000000..ab45f0b31
--- /dev/null
+++ b/tests/unit/type/list-common.tcl
@@ -0,0 +1,5 @@
+# We need a value larger than list-max-ziplist-value to make sure
+# the list has the right encoding when it is swapped in again.
+array set largevalue {}
+set largevalue(ziplist) "hello"
+set largevalue(linkedlist) [string repeat "hello" 4]
diff --git a/tests/unit/type/list.tcl b/tests/unit/type/list.tcl
index 616abd21a..ff178db41 100644
--- a/tests/unit/type/list.tcl
+++ b/tests/unit/type/list.tcl
@@ -5,11 +5,7 @@ start_server {
         "list-max-ziplist-entries" 256
     }
 } {
-    # We need a value larger than list-max-ziplist-value to make sure
-    # the list has the right encoding when it is swapped in again.
-    array set largevalue {}
-    set largevalue(ziplist) "hello"
-    set largevalue(linkedlist) [string repeat "hello" 4]
+    source "tests/unit/type/list-common.tcl"
 
     test {LPUSH, RPUSH, LLENGTH, LINDEX - ziplist} {
         # first lpush then rpush
@@ -152,8 +148,11 @@ start_server {
     test "BLPOP with variadic LPUSH" {
         set rd [redis_deferring_client]
         r del blist target
+        if {$::valgrind} {after 100}
         $rd blpop blist 0
+        if {$::valgrind} {after 100}
         assert_equal 2 [r lpush blist foo bar]
+        if {$::valgrind} {after 100}
         assert_equal {blist foo} [$rd read]
         assert_equal bar [lindex [r lrange blist 0 -1] 0]
     }
@@ -671,38 +670,6 @@ start_server {
             assert_equal {} [trim_list $type 0 -6]
         }
 
-        tags {"slow"} {
-            test "LTRIM stress testing - $type" {
-                set mylist {}
-                set startlen 32
-                r del mylist
-
-                # Start with the large value to ensure the
-                # right encoding is used.
-                r rpush mylist $large
-                lappend mylist $large
-
-                for {set i 0} {$i < $startlen} {incr i} {
-                    set str [randomInt 9223372036854775807]
-                    r rpush mylist $str
-                    lappend mylist $str
-                }
-
-                for {set i 0} {$i < 1000} {incr i} {
-                    set min [expr {int(rand()*$startlen)}]
-                    set max [expr {$min+int(rand()*$startlen)}]
-                    set mylist [lrange $mylist $min $max]
-                    r ltrim mylist $min $max
-                    assert_equal $mylist [r lrange mylist 0 -1]
-
-                    for {set j [r llen mylist]} {$j < $startlen} {incr j} {
-                        set str [randomInt 9223372036854775807]
-                        r rpush mylist $str
-                        lappend mylist $str
-                    }
-                }
-            }
-        }
     }
 
     foreach {type large} [array get largevalue] {
@@ -760,76 +727,5 @@ start_server {
             assert_equal 1 [r lrem myotherlist 1 2]
             assert_equal 3 [r llen myotherlist]
         }
-
-    }
-}
-
-start_server {
-    tags {list ziplist}
-    overrides {
-        "list-max-ziplist-value" 200000
-        "list-max-ziplist-entries" 256
-    }
-} {
-    test {Explicit regression for a list bug} {
-        set mylist {49376042582 {BkG2o\pIC]4YYJa9cJ4GWZalG[4tin;1D2whSkCOW`mX;SFXGyS8sedcff3fQI^tgPCC@^Nu1J6o]meM@Lko]t_jRyo<xSJ1oObDYd`ppZuW6P@fS278YaOx=s6lvdFlMbP0[SbkI^Kr\HBXtuFaA^mDx:yzS4a[skiiPWhT<nNfAf=aQVfclcuwDrfe;iVuKdNvB9kbfq>tK?tH[\EvWqS]b`o2OCtjg:?nUTwdjpcUm]y:pg5q24q7LlCOwQE^}}
-        r del l
-        r rpush l [lindex $mylist 0]
-        r rpush l [lindex $mylist 1]
-        assert_equal [r lindex l 0] [lindex $mylist 0]
-        assert_equal [r lindex l 1] [lindex $mylist 1]
-    }
-
-    tags {slow} {
-        test {ziplist implementation: value encoding and backlink} {
-            for {set j 0} {$j < 100} {incr j} {
-                r del l
-                set l {}
-                for {set i 0} {$i < 200} {incr i} {
-                    randpath {
-                        set data [string repeat x [randomInt 100000]]
-                    } {
-                        set data [randomInt 65536]
-                    } {
-                        set data [randomInt 4294967296]
-                    } {
-                        set data [randomInt 18446744073709551616]
-                    }
-                    lappend l $data
-                    r rpush l $data
-                }
-                assert_equal [llength $l] [r llen l]
-                # Traverse backward
-                for {set i 199} {$i >= 0} {incr i -1} {
-                    if {[lindex $l $i] ne [r lindex l $i]} {
-                        assert_equal [lindex $l $i] [r lindex l $i]
-                    }
-                }
-            }
-        }
-
-        test {ziplist implementation: encoding stress testing} {
-            for {set j 0} {$j < 200} {incr j} {
-                r del l
-                set l {}
-                set len [randomInt 400]
-                for {set i 0} {$i < $len} {incr i} {
-                    set rv [randomValue]
-                    randpath {
-                        lappend l $rv
-                        r rpush l $rv
-                    } {
-                        set l [concat [list $rv] $l]
-                        r lpush l $rv
-                    }
-                }
-                assert_equal [llength $l] [r llen l]
-                for {set i 0} {$i < 200} {incr i} {
-                    if {[lindex $l $i] ne [r lindex l $i]} {
-                        assert_equal [lindex $l $i] [r lindex l $i]
-                    }
-                }
-            }
-        }
     }
 }
diff --git a/tests/unit/type/zset.tcl b/tests/unit/type/zset.tcl
index 46d40f6fb..41f5f588f 100644
--- a/tests/unit/type/zset.tcl
+++ b/tests/unit/type/zset.tcl
@@ -527,7 +527,7 @@ start_server {tags {"zset"}} {
         } elseif {$encoding == "skiplist"} {
             r config set zset-max-ziplist-entries 0
             r config set zset-max-ziplist-value 0
-            set elements 1000
+            if {$::accurate} {set elements 1000} else {set elements 100}
         } else {
             puts "Unknown sorted set encoding"
             exit