if (de) {
robj *val = dictGetEntryVal(de);
- /* Update the access time for the aging algorithm. */
- val->lru = server.lruclock;
-
- if (server.vm_enabled) {
- if (val->storage == REDIS_VM_MEMORY ||
- val->storage == REDIS_VM_SWAPPING)
- {
- /* If we were swapping the object out, cancel the operation */
- if (val->storage == REDIS_VM_SWAPPING)
- vmCancelThreadedIOJob(val);
- } else {
- int notify = (val->storage == REDIS_VM_LOADING);
-
- /* Our value was swapped on disk. Bring it at home. */
- redisAssert(val->type == REDIS_VMPOINTER);
- val = vmLoadObject(val);
- dictGetEntryVal(de) = val;
-
- /* Clients blocked by the VM subsystem may be waiting for
- * this key... */
- if (notify) handleClientsBlockedOnSwappedKey(db,key);
- }
+ /* Update the access time for the aging algorithm.
+ * Don't do it if we have a saving child, as this will trigger
+ * a copy on write madness. */
+ if (server.bgsavechildpid == -1 && server.bgrewritechildpid == -1)
+ val->lru = server.lruclock;
+
+ if (server.ds_enabled &&
+ cacheScheduleIOGetFlags(db,key) & REDIS_IO_SAVEINPROG)
+ {
+ /* There is a save in progress for this object!
+ * Wait for it to get out. */
+ waitEmptyIOJobsQueue();
+ processAllPendingIOJobs();
+ redisAssert(!(cacheScheduleIOGetFlags(db,key) & REDIS_IO_SAVEINPROG));
}
+ server.stat_keyspace_hits++;
return val;
} else {
+ time_t expire;
+ robj *val;
+
+ /* Key not found in the in memory hash table, but if disk store is
+ * enabled we may have this key on disk. If so load it in memory
+ * in a blocking way. */
+ if (server.ds_enabled && cacheKeyMayExist(db,key)) {
+ if (cacheScheduleIOGetFlags(db,key) & REDIS_IO_SAVEINPROG) {
+ /* There is a save in progress for this object!
+ * Wait for it to get out. */
+ waitEmptyIOJobsQueue();
+ processAllPendingIOJobs();
+ redisAssert((cacheScheduleIOGetFlags(db,key) & REDIS_IO_SAVEINPROG) == 0);
+ }
+
+ redisLog(REDIS_DEBUG,"Force loading key %s via lookup",
+ key->ptr);
+ val = dsGet(db,key,&expire);
+ if (val) {
+ int retval = dbAdd(db,key,val);
+ redisAssert(retval == REDIS_OK);
+ if (expire != -1) setExpire(db,key,expire);
+ server.stat_keyspace_hits++;
+ return val;
+ }
+ }
+ server.stat_keyspace_misses++;
return NULL;
}
}
} else {
sds copy = sdsdup(key->ptr);
dictAdd(db->dict, copy, val);
+ if (server.ds_enabled) cacheSetKeyMayExist(db,key);
return REDIS_OK;
}
}
*
* On update (key already existed) 0 is returned. Otherwise 1. */
int dbReplace(redisDb *db, robj *key, robj *val) {
- if (dictFind(db->dict,key->ptr) == NULL) {
+ robj *oldval;
+ int retval;
+
+ if ((oldval = dictFetchValue(db->dict,key->ptr)) == NULL) {
sds copy = sdsdup(key->ptr);
dictAdd(db->dict, copy, val);
- return 1;
+ retval = 1;
} else {
dictReplace(db->dict, key->ptr, val);
- return 0;
+ retval = 0;
}
+ if (server.ds_enabled) cacheSetKeyMayExist(db,key);
+ return retval;
}
int dbExists(redisDb *db, robj *key) {
/* Delete a key, value, and associated expiration entry if any, from the DB */
int dbDelete(redisDb *db, robj *key) {
- /* If VM is enabled make sure to awake waiting clients for this key:
- * deleting the key will kill the I/O thread bringing the key from swap
- * to memory, so the client will never be notified and unblocked if we
- * don't do it now. */
- if (server.vm_enabled) handleClientsBlockedOnSwappedKey(db,key);
+ /* If diskstore is enabled make sure to awake waiting clients for this key
+ * as it is not really useful to wait for a key already deleted to be
+ * loaded from disk. */
+ if (server.ds_enabled) {
+ handleClientsBlockedOnSwappedKey(db,key);
+ cacheSetKeyDoesNotExist(db,key);
+ }
+
/* Deleting an entry from the expires dict will not free the sds of
* the key, because it is shared with the main dictionary. */
if (dictSize(db->expires) > 0) dictDelete(db->expires,key->ptr);
return REDIS_OK;
}
+/*-----------------------------------------------------------------------------
+ * Hooks for key space changes.
+ *
+ * Every time a key in the database is modified the function
+ * signalModifiedKey() is called.
+ *
+ * Every time a DB is flushed the function signalFlushDb() is called.
+ *----------------------------------------------------------------------------*/
+
+void signalModifiedKey(redisDb *db, robj *key) {
+ touchWatchedKey(db,key);
+ if (server.ds_enabled)
+ cacheScheduleIO(db,key,REDIS_IO_SAVE);
+}
+
+void signalFlushedDb(int dbid) {
+ touchWatchedKeysOnFlush(dbid);
+}
+
/*-----------------------------------------------------------------------------
* Type agnostic commands operating on the key space
*----------------------------------------------------------------------------*/
void flushdbCommand(redisClient *c) {
server.dirty += dictSize(c->db->dict);
- touchWatchedKeysOnFlush(c->db->id);
+ signalFlushedDb(c->db->id);
dictEmpty(c->db->dict);
dictEmpty(c->db->expires);
+ if (server.ds_enabled) dsFlushDb(c->db->id);
addReply(c,shared.ok);
}
void flushallCommand(redisClient *c) {
- touchWatchedKeysOnFlush(-1);
+ signalFlushedDb(-1);
server.dirty += emptyDb();
addReply(c,shared.ok);
if (server.bgsavechildpid != -1) {
kill(server.bgsavechildpid,SIGKILL);
rdbRemoveTempFile(server.bgsavechildpid);
}
- rdbSave(server.dbfilename);
+ if (server.ds_enabled)
+ dsFlushDb(-1);
+ else
+ rdbSave(server.dbfilename);
server.dirty++;
}
int deleted = 0, j;
for (j = 1; j < c->argc; j++) {
+ if (server.ds_enabled) {
+ lookupKeyRead(c->db,c->argv[j]);
+ /* FIXME: this can be optimized a lot, no real need to load
+ * a possibly huge value. */
+ }
if (dbDelete(c->db,c->argv[j])) {
- touchWatchedKey(c->db,c->argv[j]);
+ signalModifiedKey(c->db,c->argv[j]);
server.dirty++;
deleted++;
+ } else if (server.ds_enabled) {
+ if (cacheKeyMayExist(c->db,c->argv[j]) &&
+ dsExists(c->db,c->argv[j]))
+ {
+ cacheScheduleIO(c->db,c->argv[j],REDIS_IO_SAVE);
+ deleted = 1;
+ }
}
}
addReplyLongLong(c,deleted);
dbReplace(c->db,c->argv[2],o);
}
dbDelete(c->db,c->argv[1]);
- touchWatchedKey(c->db,c->argv[1]);
- touchWatchedKey(c->db,c->argv[2]);
+ signalModifiedKey(c->db,c->argv[1]);
+ signalModifiedKey(c->db,c->argv[2]);
server.dirty++;
addReply(c,nx ? shared.cone : shared.ok);
}
* will be consistent even if we allow write operations against expiring
* keys. */
void propagateExpire(redisDb *db, robj *key) {
- struct redisCommand *cmd;
robj *argv[2];
- cmd = lookupCommand("del");
argv[0] = createStringObject("DEL",3);
argv[1] = key;
incrRefCount(key);
if (server.appendonly)
- feedAppendOnlyFile(cmd,db->id,argv,2);
+ feedAppendOnlyFile(server.delCommand,db->id,argv,2);
if (listLength(server.slaves))
replicationFeedSlaves(server.slaves,db->id,argv,2);
/* Delete the key */
server.stat_expiredkeys++;
- server.dirty++;
propagateExpire(db,key);
return dbDelete(db,key);
}
if (seconds <= 0) {
if (dbDelete(c->db,key)) server.dirty++;
addReply(c, shared.cone);
- touchWatchedKey(c->db,key);
+ signalModifiedKey(c->db,key);
return;
} else {
time_t when = time(NULL)+seconds;
setExpire(c->db,key,when);
addReply(c,shared.cone);
- touchWatchedKey(c->db,key);
+ signalModifiedKey(c->db,key);
server.dirty++;
return;
}
projects / redis.git / blobdiff