
Before this change (most recently modified in https://github.com/redis/redis/pull/12850#discussion_r1421406393), The trigger for normal expand threshold was 100% utilization and the trigger for normal shrink threshold was 10% (HASHTABLE_MIN_FILL). While during fork (DICT_RESIZE_AVOID), when we want to avoid rehash, the trigger thresholds were multiplied by 5 (`dict_force_resize_ratio`), meaning 500% for expand and 2% (100/10/5) for shrink. However, in `dictRehash` (the incremental rehashing), the rehashing threshold for shrinking during fork (DICT_RESIZE_AVOID) was 20% by mistake. This meant that if a shrinking is triggered when `dict_can_resize` is `DICT_RESIZE_ENABLE` which the threshold is 10%, the rehashing can continue when `dict_can_resize` is `DICT_RESIZE_AVOID`. This would cause unwanted CopyOnWrite damage. It'll make sense to change the thresholds of the rehash trigger and the thresholds of the incremental rehashing the same, however, in one we compare the size of the hash table to the number of records, and in the other we compare the size of ht[0] to the size of ht[1], so the formula is not exactly the same. to make things easier we change all the thresholds to powers of 2, so the normal shrinking threshold is changed from 100/10 (i.e. 10%) to 100/8 (i.e. 12.5%), and we change the threshold during forks from 5 to 4, i.e. from 500% to 400% for expand, and from 2% (100/10/5) to 3.125% (100/8/4)
490 lines
15 KiB
Tcl
490 lines
15 KiB
Tcl
start_server {tags {"other"}} {
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if {$::force_failure} {
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# This is used just for test suite development purposes.
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test {Failing test} {
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format err
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} {ok}
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}
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test {Coverage: HELP commands} {
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assert_match "*OBJECT <subcommand> *" [r OBJECT HELP]
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assert_match "*MEMORY <subcommand> *" [r MEMORY HELP]
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assert_match "*PUBSUB <subcommand> *" [r PUBSUB HELP]
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assert_match "*SLOWLOG <subcommand> *" [r SLOWLOG HELP]
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assert_match "*CLIENT <subcommand> *" [r CLIENT HELP]
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assert_match "*COMMAND <subcommand> *" [r COMMAND HELP]
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assert_match "*CONFIG <subcommand> *" [r CONFIG HELP]
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assert_match "*FUNCTION <subcommand> *" [r FUNCTION HELP]
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assert_match "*MODULE <subcommand> *" [r MODULE HELP]
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}
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test {Coverage: MEMORY MALLOC-STATS} {
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if {[string match {*jemalloc*} [s mem_allocator]]} {
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assert_match "*jemalloc*" [r memory malloc-stats]
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}
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}
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test {Coverage: MEMORY PURGE} {
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if {[string match {*jemalloc*} [s mem_allocator]]} {
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assert_equal {OK} [r memory purge]
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}
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}
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test {SAVE - make sure there are all the types as values} {
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# Wait for a background saving in progress to terminate
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waitForBgsave r
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r lpush mysavelist hello
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r lpush mysavelist world
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r set myemptykey {}
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r set mynormalkey {blablablba}
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r zadd mytestzset 10 a
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r zadd mytestzset 20 b
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r zadd mytestzset 30 c
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r save
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} {OK} {needs:save}
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tags {slow} {
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if {$::accurate} {set iterations 10000} else {set iterations 1000}
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foreach fuzztype {binary alpha compr} {
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test "FUZZ stresser with data model $fuzztype" {
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set err 0
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for {set i 0} {$i < $iterations} {incr i} {
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set fuzz [randstring 0 512 $fuzztype]
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r set foo $fuzz
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set got [r get foo]
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if {$got ne $fuzz} {
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set err [list $fuzz $got]
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break
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}
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}
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set _ $err
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} {0}
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}
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}
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start_server {overrides {save ""} tags {external:skip}} {
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test {FLUSHALL should not reset the dirty counter if we disable save} {
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r set key value
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r flushall
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assert_morethan [s rdb_changes_since_last_save] 0
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}
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test {FLUSHALL should reset the dirty counter to 0 if we enable save} {
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r config set save "3600 1 300 100 60 10000"
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r set key value
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r flushall
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assert_equal [s rdb_changes_since_last_save] 0
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}
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}
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test {BGSAVE} {
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# Use FLUSHALL instead of FLUSHDB, FLUSHALL do a foreground save
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# and reset the dirty counter to 0, so we won't trigger an unexpected bgsave.
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r flushall
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r save
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r set x 10
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r bgsave
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waitForBgsave r
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r debug reload
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r get x
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} {10} {needs:debug needs:save}
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test {SELECT an out of range DB} {
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catch {r select 1000000} err
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set _ $err
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} {*index is out of range*} {cluster:skip}
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tags {consistency} {
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proc check_consistency {dumpname code} {
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set dump [csvdump r]
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set sha1 [debug_digest]
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uplevel 1 $code
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set sha1_after [debug_digest]
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if {$sha1 eq $sha1_after} {
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return 1
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}
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# Failed
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set newdump [csvdump r]
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puts "Consistency test failed!"
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puts "You can inspect the two dumps in /tmp/${dumpname}*.txt"
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set fd [open /tmp/${dumpname}1.txt w]
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puts $fd $dump
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close $fd
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set fd [open /tmp/${dumpname}2.txt w]
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puts $fd $newdump
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close $fd
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return 0
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}
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if {$::accurate} {set numops 10000} else {set numops 1000}
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test {Check consistency of different data types after a reload} {
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r flushdb
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createComplexDataset r $numops usetag
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if {$::ignoredigest} {
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set _ 1
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} else {
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check_consistency {repldump} {
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r debug reload
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}
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}
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} {1} {needs:debug}
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test {Same dataset digest if saving/reloading as AOF?} {
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if {$::ignoredigest} {
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set _ 1
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} else {
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check_consistency {aofdump} {
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r config set aof-use-rdb-preamble no
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r bgrewriteaof
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waitForBgrewriteaof r
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r debug loadaof
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}
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}
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} {1} {needs:debug}
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}
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test {EXPIRES after a reload (snapshot + append only file rewrite)} {
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r flushdb
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r set x 10
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r expire x 1000
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r save
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r debug reload
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set ttl [r ttl x]
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set e1 [expr {$ttl > 900 && $ttl <= 1000}]
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r bgrewriteaof
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waitForBgrewriteaof r
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r debug loadaof
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set ttl [r ttl x]
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set e2 [expr {$ttl > 900 && $ttl <= 1000}]
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list $e1 $e2
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} {1 1} {needs:debug needs:save}
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test {EXPIRES after AOF reload (without rewrite)} {
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r flushdb
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r config set appendonly yes
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r config set aof-use-rdb-preamble no
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r set x somevalue
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r expire x 1000
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r setex y 2000 somevalue
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r set z somevalue
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r expireat z [expr {[clock seconds]+3000}]
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# Milliseconds variants
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r set px somevalue
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r pexpire px 1000000
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r psetex py 2000000 somevalue
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r set pz somevalue
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r pexpireat pz [expr {([clock seconds]+3000)*1000}]
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# Reload and check
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waitForBgrewriteaof r
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# We need to wait two seconds to avoid false positives here, otherwise
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# the DEBUG LOADAOF command may read a partial file.
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# Another solution would be to set the fsync policy to no, since this
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# prevents write() to be delayed by the completion of fsync().
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after 2000
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r debug loadaof
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set ttl [r ttl x]
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assert {$ttl > 900 && $ttl <= 1000}
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set ttl [r ttl y]
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assert {$ttl > 1900 && $ttl <= 2000}
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set ttl [r ttl z]
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assert {$ttl > 2900 && $ttl <= 3000}
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set ttl [r ttl px]
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assert {$ttl > 900 && $ttl <= 1000}
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set ttl [r ttl py]
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assert {$ttl > 1900 && $ttl <= 2000}
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set ttl [r ttl pz]
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assert {$ttl > 2900 && $ttl <= 3000}
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r config set appendonly no
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} {OK} {needs:debug}
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tags {protocol} {
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test {PIPELINING stresser (also a regression for the old epoll bug)} {
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if {$::tls} {
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set fd2 [::tls::socket [srv host] [srv port]]
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} else {
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set fd2 [socket [srv host] [srv port]]
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}
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fconfigure $fd2 -encoding binary -translation binary
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if {!$::singledb} {
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puts -nonewline $fd2 "SELECT 9\r\n"
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flush $fd2
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gets $fd2
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}
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for {set i 0} {$i < 100000} {incr i} {
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set q {}
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set val "0000${i}0000"
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append q "SET key:$i $val\r\n"
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puts -nonewline $fd2 $q
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set q {}
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append q "GET key:$i\r\n"
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puts -nonewline $fd2 $q
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}
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flush $fd2
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for {set i 0} {$i < 100000} {incr i} {
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gets $fd2 line
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gets $fd2 count
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set count [string range $count 1 end]
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set val [read $fd2 $count]
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read $fd2 2
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}
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close $fd2
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set _ 1
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} {1}
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}
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test {APPEND basics} {
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r del foo
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list [r append foo bar] [r get foo] \
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[r append foo 100] [r get foo]
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} {3 bar 6 bar100}
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test {APPEND basics, integer encoded values} {
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set res {}
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r del foo
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r append foo 1
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r append foo 2
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lappend res [r get foo]
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r set foo 1
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r append foo 2
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lappend res [r get foo]
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} {12 12}
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test {APPEND fuzzing} {
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set err {}
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foreach type {binary alpha compr} {
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set buf {}
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r del x
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for {set i 0} {$i < 1000} {incr i} {
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set bin [randstring 0 10 $type]
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append buf $bin
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r append x $bin
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}
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if {$buf != [r get x]} {
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set err "Expected '$buf' found '[r get x]'"
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break
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}
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}
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set _ $err
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} {}
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# Leave the user with a clean DB before to exit
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test {FLUSHDB} {
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set aux {}
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if {$::singledb} {
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r flushdb
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lappend aux 0 [r dbsize]
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} else {
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r select 9
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r flushdb
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lappend aux [r dbsize]
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r select 10
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r flushdb
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lappend aux [r dbsize]
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}
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} {0 0}
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test {Perform a final SAVE to leave a clean DB on disk} {
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waitForBgsave r
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r save
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} {OK} {needs:save}
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test {RESET clears client state} {
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r client setname test-client
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r client tracking on
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assert_equal [r reset] "RESET"
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set client [r client list]
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assert_match {*name= *} $client
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assert_match {*flags=N *} $client
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} {} {needs:reset}
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test {RESET clears MONITOR state} {
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set rd [redis_deferring_client]
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$rd monitor
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assert_equal [$rd read] "OK"
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$rd reset
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assert_equal [$rd read] "RESET"
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$rd close
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assert_no_match {*flags=O*} [r client list]
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} {} {needs:reset}
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test {RESET clears and discards MULTI state} {
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r multi
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r set key-a a
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r reset
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catch {r exec} err
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assert_match {*EXEC without MULTI*} $err
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} {} {needs:reset}
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test {RESET clears Pub/Sub state} {
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r subscribe channel-1
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r reset
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# confirm we're not subscribed by executing another command
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r set key val
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} {OK} {needs:reset}
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test {RESET clears authenticated state} {
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r acl setuser user1 on >secret +@all
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r auth user1 secret
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assert_equal [r acl whoami] user1
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r reset
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assert_equal [r acl whoami] default
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} {} {needs:reset}
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test "Subcommand syntax error crash (issue #10070)" {
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assert_error {*unknown command*} {r GET|}
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assert_error {*unknown command*} {r GET|SET}
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assert_error {*unknown command*} {r GET|SET|OTHER}
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assert_error {*unknown command*} {r CONFIG|GET GET_XX}
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assert_error {*unknown subcommand*} {r CONFIG GET_XX}
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}
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}
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start_server {tags {"other external:skip"}} {
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test {Don't rehash if redis has child process} {
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r config set save ""
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r config set rdb-key-save-delay 1000000
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populate 4096 "" 1
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r bgsave
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wait_for_condition 10 100 {
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[s rdb_bgsave_in_progress] eq 1
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} else {
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fail "bgsave did not start in time"
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}
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r mset k1 v1 k2 v2
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# Hash table should not rehash
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assert_no_match "*table size: 8192*" [r debug HTSTATS 9]
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exec kill -9 [get_child_pid 0]
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waitForBgsave r
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after 200 ;# waiting for serverCron
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# Hash table should rehash since there is no child process,
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# size is power of two and over 4098, so it is 8192
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r set k3 v3
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assert_match "*table size: 8192*" [r debug HTSTATS 9]
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} {} {needs:debug needs:local-process}
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}
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proc read_proc_title {pid} {
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set fd [open "/proc/$pid/cmdline" "r"]
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set cmdline [read $fd 1024]
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close $fd
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return $cmdline
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}
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start_server {tags {"other external:skip"}} {
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test {Process title set as expected} {
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# Test only on Linux where it's easy to get cmdline without relying on tools.
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# Skip valgrind as it messes up the arguments.
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set os [exec uname]
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if {$os == "Linux" && !$::valgrind} {
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# Set a custom template
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r config set "proc-title-template" "TEST {title} {listen-addr} {port} {tls-port} {unixsocket} {config-file}"
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set cmdline [read_proc_title [srv 0 pid]]
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assert_equal "TEST" [lindex $cmdline 0]
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assert_match "*/redis-server" [lindex $cmdline 1]
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if {$::tls} {
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set expect_port [srv 0 pport]
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set expect_tls_port [srv 0 port]
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set port [srv 0 pport]
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} else {
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set expect_port [srv 0 port]
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set expect_tls_port 0
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set port [srv 0 port]
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}
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assert_equal "$::host:$port" [lindex $cmdline 2]
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assert_equal $expect_port [lindex $cmdline 3]
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assert_equal $expect_tls_port [lindex $cmdline 4]
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assert_match "*/tests/tmp/server.*/socket" [lindex $cmdline 5]
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assert_match "*/tests/tmp/redis.conf.*" [lindex $cmdline 6]
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# Try setting a bad template
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catch {r config set "proc-title-template" "{invalid-var}"} err
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assert_match {*template format is invalid*} $err
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}
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}
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}
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start_cluster 1 0 {tags {"other external:skip cluster slow"}} {
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test "Redis can trigger resizing" {
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r flushall
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# hashslot(foo) is 12182
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for {set j 1} {$j <= 128} {incr j} {
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r set "{foo}$j" a
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}
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assert_match "*table size: 128*" [r debug HTSTATS 0]
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# disable resizing
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r config set rdb-key-save-delay 10000000
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r bgsave
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# delete data to have lot's (96%) of empty buckets
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for {set j 1} {$j <= 123} {incr j} {
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r del "{foo}$j"
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}
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assert_match "*table size: 128*" [r debug HTSTATS 0]
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# enable resizing
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r config set rdb-key-save-delay 0
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catch {exec kill -9 [get_child_pid 0]}
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wait_for_condition 1000 10 {
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[s rdb_bgsave_in_progress] eq 0
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} else {
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fail "bgsave did not stop in time."
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}
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after 200;# waiting for serverCron
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assert_match "*table size: 8*" [r debug HTSTATS 0]
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} {} {needs:debug}
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test "Redis can rewind and trigger smaller slot resizing" {
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# hashslot(foo) is 12182
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# hashslot(alice) is 749, smaller than hashslot(foo),
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# attempt to trigger a resize on it, see details in #12802.
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for {set j 1} {$j <= 128} {incr j} {
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r set "{alice}$j" a
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}
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# disable resizing
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r config set rdb-key-save-delay 10000000
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r bgsave
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for {set j 1} {$j <= 123} {incr j} {
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r del "{alice}$j"
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}
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# enable resizing
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r config set rdb-key-save-delay 0
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catch {exec kill -9 [get_child_pid 0]}
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wait_for_condition 1000 10 {
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[s rdb_bgsave_in_progress] eq 0
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} else {
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fail "bgsave did not stop in time."
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}
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after 200;# waiting for serverCron
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assert_match "*table size: 16*" [r debug HTSTATS 0]
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} {} {needs:debug}
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}
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