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Client side caching: fields and flags for tracking mode.

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This commit is contained in:
antirez 2019-06-29 20:08:41 -04:00
parent a28d7918d7
commit 45d64f229e
2 changed files with 23 additions and 3 deletions
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5
src/networking.c
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@ -158,6 +158,7 @@ client *createClient(int fd) {
c->pubsub_patterns = listCreate(); c->pubsub_patterns = listCreate();
c->peerid = NULL; c->peerid = NULL;
c->client_list_node = NULL; c->client_list_node = NULL;
c->client_tracking_redirection = 0;
listSetFreeMethod(c->pubsub_patterns,decrRefCountVoid); listSetFreeMethod(c->pubsub_patterns,decrRefCountVoid);
listSetMatchMethod(c->pubsub_patterns,listMatchObjects); listSetMatchMethod(c->pubsub_patterns,listMatchObjects);
if (fd != -1) linkClient(c); if (fd != -1) linkClient(c);
@ -966,6 +967,9 @@ void unlinkClient(client *c) {
listDelNode(server.unblocked_clients,ln); listDelNode(server.unblocked_clients,ln);
c->flags &= ~CLIENT_UNBLOCKED; c->flags &= ~CLIENT_UNBLOCKED;
} }
/* Clear the tracking status. */
if (c->flags & CLIENT_TRACKING) disableTracking(c);
} }
void freeClient(client *c) { void freeClient(client *c) {
@ -1849,6 +1853,7 @@ sds catClientInfoString(sds s, client *client) {
if (client->flags & CLIENT_PUBSUB) *p++ = 'P'; if (client->flags & CLIENT_PUBSUB) *p++ = 'P';
if (client->flags & CLIENT_MULTI) *p++ = 'x'; if (client->flags & CLIENT_MULTI) *p++ = 'x';
if (client->flags & CLIENT_BLOCKED) *p++ = 'b'; if (client->flags & CLIENT_BLOCKED) *p++ = 'b';
if (client->flags & CLIENT_TRACKING) *p++ = 't';
if (client->flags & CLIENT_DIRTY_CAS) *p++ = 'd'; if (client->flags & CLIENT_DIRTY_CAS) *p++ = 'd';
if (client->flags & CLIENT_CLOSE_AFTER_REPLY) *p++ = 'c'; if (client->flags & CLIENT_CLOSE_AFTER_REPLY) *p++ = 'c';
if (client->flags & CLIENT_UNBLOCKED) *p++ = 'u'; if (client->flags & CLIENT_UNBLOCKED) *p++ = 'u';

21
src/server.h
View File

@ -254,8 +254,8 @@ typedef long long mstime_t; /* millisecond time type. */
#define AOF_WAIT_REWRITE 2 /* AOF waits rewrite to start appending */ #define AOF_WAIT_REWRITE 2 /* AOF waits rewrite to start appending */
/* Client flags */ /* Client flags */
#define CLIENT_SLAVE (1<<0) /* This client is a slave server */ #define CLIENT_SLAVE (1<<0) /* This client is a repliaca */
#define CLIENT_MASTER (1<<1) /* This client is a master server */ #define CLIENT_MASTER (1<<1) /* This client is a master */
#define CLIENT_MONITOR (1<<2) /* This client is a slave monitor, see MONITOR */ #define CLIENT_MONITOR (1<<2) /* This client is a slave monitor, see MONITOR */
#define CLIENT_MULTI (1<<3) /* This client is in a MULTI context */ #define CLIENT_MULTI (1<<3) /* This client is in a MULTI context */
#define CLIENT_BLOCKED (1<<4) /* The client is waiting in a blocking operation */ #define CLIENT_BLOCKED (1<<4) /* The client is waiting in a blocking operation */
@ -289,7 +289,12 @@ typedef long long mstime_t; /* millisecond time type. */
#define CLIENT_PENDING_READ (1<<29) /* The client has pending reads and was put #define CLIENT_PENDING_READ (1<<29) /* The client has pending reads and was put
in the list of clients we can read in the list of clients we can read
from. */ from. */
#define CLIENT_PENDING_COMMAND (1<<30) /* */ #define CLIENT_PENDING_COMMAND (1<<30) /* Used in threaded I/O to signal after
we return single threaded that the
client has already pending commands
to be executed. */
#define CLIENT_TRACKING (1<<31) /* Client enabled keys tracking in order to
perform client side caching. */
/* Client block type (btype field in client structure) /* Client block type (btype field in client structure)
* if CLIENT_BLOCKED flag is set. */ * if CLIENT_BLOCKED flag is set. */
@ -845,6 +850,11 @@ typedef struct client {
sds peerid; /* Cached peer ID. */ sds peerid; /* Cached peer ID. */
listNode *client_list_node; /* list node in client list */ listNode *client_list_node; /* list node in client list */
/* If this client is in tracking mode and this field is non zero,
* invalidation messages for keys fetched by this client will be send to
* the specified client ID. */
uint64_t client_tracking_redirection;
/* Response buffer */ /* Response buffer */
int bufpos; int bufpos;
char buf[PROTO_REPLY_CHUNK_BYTES]; char buf[PROTO_REPLY_CHUNK_BYTES];
@ -1286,6 +1296,8 @@ struct redisServer {
unsigned int blocked_clients_by_type[BLOCKED_NUM]; unsigned int blocked_clients_by_type[BLOCKED_NUM];
list *unblocked_clients; /* list of clients to unblock before next loop */ list *unblocked_clients; /* list of clients to unblock before next loop */
list *ready_keys; /* List of readyList structures for BLPOP & co */ list *ready_keys; /* List of readyList structures for BLPOP & co */
/* Client side caching. */
unsigned int tracking_clients; /* # of clients with tracking enabled.*/
/* Sort parameters - qsort_r() is only available under BSD so we /* Sort parameters - qsort_r() is only available under BSD so we
* have to take this state global, in order to pass it to sortCompare() */ * have to take this state global, in order to pass it to sortCompare() */
int sort_desc; int sort_desc;
@ -1602,6 +1614,9 @@ void addReplyErrorFormat(client *c, const char *fmt, ...);
void addReplyStatusFormat(client *c, const char *fmt, ...); void addReplyStatusFormat(client *c, const char *fmt, ...);
#endif #endif
/* Client side caching (tracking mode) */
void disableTracking(client *c);
/* List data type */ /* List data type */
void listTypeTryConversion(robj *subject, robj *value); void listTypeTryConversion(robj *subject, robj *value);
void listTypePush(robj *subject, robj *value, int where); void listTypePush(robj *subject, robj *value, int where);