source reshaped a bit to play well with a bgsaving thread, still work to do, does...

[redis.git] / src / redis.c

diff --git a/src/redis.c b/src/redis.c
index 14923bc88983e11b463cf128e2f97eecd45fbb68..2fd3ee39e3c8843f1f5e56c991e195c11b8aaf10 100644 (file)
--- a/src/redis.c
+++ b/src/redis.c
@@ -74,10 +74,14 @@ struct redisCommand readonlyCommandTable[] = {
     {"setnx",setnxCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0},
     {"setex",setexCommand,4,REDIS_CMD_DENYOOM,NULL,0,0,0},
     {"append",appendCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"setnx",setnxCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0},
     {"setex",setexCommand,4,REDIS_CMD_DENYOOM,NULL,0,0,0},
     {"append",appendCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},

-    {"substr",substrCommand,4,0,NULL,1,1,1},

     {"strlen",strlenCommand,2,0,NULL,1,1,1},
     {"del",delCommand,-2,0,NULL,0,0,0},
     {"exists",existsCommand,2,0,NULL,1,1,1},
     {"strlen",strlenCommand,2,0,NULL,1,1,1},
     {"del",delCommand,-2,0,NULL,0,0,0},
     {"exists",existsCommand,2,0,NULL,1,1,1},

+    {"setbit",setbitCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+    {"getbit",getbitCommand,3,0,NULL,1,1,1},
+    {"setrange",setrangeCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+    {"getrange",getrangeCommand,4,0,NULL,1,1,1},
+    {"substr",getrangeCommand,4,0,NULL,1,1,1},

     {"incr",incrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"decr",decrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"mget",mgetCommand,-2,0,NULL,1,-1,1},
     {"incr",incrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"decr",decrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"mget",mgetCommand,-2,0,NULL,1,-1,1},


@@ -89,6 +93,7 @@ struct redisCommand readonlyCommandTable[] = {
     {"rpop",rpopCommand,2,0,NULL,1,1,1},
     {"lpop",lpopCommand,2,0,NULL,1,1,1},
     {"brpop",brpopCommand,-3,0,NULL,1,1,1},
     {"rpop",rpopCommand,2,0,NULL,1,1,1},
     {"lpop",lpopCommand,2,0,NULL,1,1,1},
     {"brpop",brpopCommand,-3,0,NULL,1,1,1},

+    {"brpoplpush",brpoplpushCommand,4,REDIS_CMD_DENYOOM,NULL,1,2,1},

     {"blpop",blpopCommand,-3,0,NULL,1,1,1},
     {"llen",llenCommand,2,0,NULL,1,1,1},
     {"lindex",lindexCommand,3,0,NULL,1,1,1},
     {"blpop",blpopCommand,-3,0,NULL,1,1,1},
     {"llen",llenCommand,2,0,NULL,1,1,1},
     {"lindex",lindexCommand,3,0,NULL,1,1,1},


@@ -96,7 +101,7 @@ struct redisCommand readonlyCommandTable[] = {
     {"lrange",lrangeCommand,4,0,NULL,1,1,1},
     {"ltrim",ltrimCommand,4,0,NULL,1,1,1},
     {"lrem",lremCommand,4,0,NULL,1,1,1},
     {"lrange",lrangeCommand,4,0,NULL,1,1,1},
     {"ltrim",ltrimCommand,4,0,NULL,1,1,1},
     {"lrem",lremCommand,4,0,NULL,1,1,1},

-    {"rpoplpush",rpoplpushcommand,3,REDIS_CMD_DENYOOM,NULL,1,2,1},
+    {"rpoplpush",rpoplpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,2,1},

     {"sadd",saddCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"srem",sremCommand,3,0,NULL,1,1,1},
     {"smove",smoveCommand,4,0,NULL,1,2,1},
     {"sadd",saddCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
     {"srem",sremCommand,3,0,NULL,1,1,1},
     {"smove",smoveCommand,4,0,NULL,1,2,1},


@@ -340,7 +345,7 @@ unsigned int dictEncObjHash(const void *key) {
     }
 }
 
     }
 }
 

-/* Sets type */
+/* Sets type and diskstore negative caching hash table */

 dictType setDictType = {
     dictEncObjHash,            /* hash function */
     NULL,                      /* key dup */
 dictType setDictType = {
     dictEncObjHash,            /* hash function */
     NULL,                      /* key dup */


@@ -575,7 +580,7 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
     }
 
     /* Close connections of timedout clients */
     }
 
     /* Close connections of timedout clients */

-    if ((server.maxidletime && !(loops % 100)) || server.blpop_blocked_clients)
+    if ((server.maxidletime && !(loops % 100)) || server.bpop_blocked_clients)

         closeTimedoutClients();
 
     /* Check if a background saving or AOF rewrite in progress terminated */
         closeTimedoutClients();
 
     /* Check if a background saving or AOF rewrite in progress terminated */


@@ -584,14 +589,32 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
         pid_t pid;
 
         if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) {
         pid_t pid;
 
         if ((pid = wait3(&statloc,WNOHANG,NULL)) != 0) {

+            int exitcode = WEXITSTATUS(statloc);
+            int bysignal = 0;
+            
+            if (WIFSIGNALED(statloc)) bysignal = WTERMSIG(statloc);
+

             if (pid == server.bgsavechildpid) {
             if (pid == server.bgsavechildpid) {

-                backgroundSaveDoneHandler(statloc);
+                backgroundSaveDoneHandler(exitcode,bysignal);

             } else {
             } else {

-                backgroundRewriteDoneHandler(statloc);
+                backgroundRewriteDoneHandler(exitcode,bysignal);

             }
             updateDictResizePolicy();
         }
             }
             updateDictResizePolicy();
         }

-    } else {
+        if (server.bgsavethread != (pthread_t) -1) {
+            int state;
+
+            pthread_mutex_lock(&server.bgsavethread_mutex);
+            state = server.bgsavethread_state;
+            pthread_mutex_unlock(&server.bgsavethread_mutex);
+
+            if (state == REDIS_BGSAVE_DONE_OK || state == REDIS_BGSAVE_DONE_ERR)
+            {
+                backgroundSaveDoneHandler(
+                    (state == REDIS_BGSAVE_DONE_OK) ? 0 : 1, 0);
+            }
+        }
+    } else if (!server.ds_enabled) {

         /* If there is not a background saving in progress check if
          * we have to save now */
          time_t now = time(NULL);
         /* If there is not a background saving in progress check if
          * we have to save now */
          time_t now = time(NULL);


@@ -613,28 +636,9 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
      * in order to guarantee a strict consistency. */
     if (server.masterhost == NULL) activeExpireCycle();
 
      * in order to guarantee a strict consistency. */
     if (server.masterhost == NULL) activeExpireCycle();
 

-    /* Swap a few keys on disk if we are over the memory limit and VM
-     * is enbled. Try to free objects from the free list first. */
-    if (vmCanSwapOut()) {
-        while (server.vm_enabled && zmalloc_used_memory() >
-                server.vm_max_memory)
-        {
-            int retval = (server.vm_max_threads == 0) ?
-                        vmSwapOneObjectBlocking() :
-                        vmSwapOneObjectThreaded();
-            if (retval == REDIS_ERR && !(loops % 300) &&
-                zmalloc_used_memory() >
-                (server.vm_max_memory+server.vm_max_memory/10))
-            {
-                redisLog(REDIS_WARNING,"WARNING: vm-max-memory limit exceeded by more than 10%% but unable to swap more objects out!");
-            }
-            /* Note that when using threade I/O we free just one object,
-             * because anyway when the I/O thread in charge to swap this
-             * object out will finish, the handler of completed jobs
-             * will try to swap more objects if we are still out of memory. */
-            if (retval == REDIS_ERR || server.vm_max_threads > 0) break;
-        }
-    }
+    /* Remove a few cached objects from memory if we are over the
+     * configured memory limit */
+    if (server.ds_enabled) cacheCron();

 
     /* Replication cron function -- used to reconnect to master and
      * to detect transfer failures. */
 
     /* Replication cron function -- used to reconnect to master and
      * to detect transfer failures. */


@@ -648,21 +652,22 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
  * for ready file descriptors. */
 void beforeSleep(struct aeEventLoop *eventLoop) {
     REDIS_NOTUSED(eventLoop);
  * for ready file descriptors. */
 void beforeSleep(struct aeEventLoop *eventLoop) {
     REDIS_NOTUSED(eventLoop);

+    listNode *ln;
+    redisClient *c;

 
 

-    /* Awake clients that got all the swapped keys they requested */
-    if (server.vm_enabled && listLength(server.io_ready_clients)) {
+    /* Awake clients that got all the on disk keys they requested */
+    if (server.ds_enabled && listLength(server.io_ready_clients)) {

         listIter li;
         listIter li;

-        listNode *ln;

 
         listRewind(server.io_ready_clients,&li);
         while((ln = listNext(&li))) {
 
         listRewind(server.io_ready_clients,&li);
         while((ln = listNext(&li))) {

-            redisClient *c = ln->value;
+            c = ln->value;

             struct redisCommand *cmd;
 
             /* Resume the client. */
             listDelNode(server.io_ready_clients,ln);
             c->flags &= (~REDIS_IO_WAIT);
             struct redisCommand *cmd;
 
             /* Resume the client. */
             listDelNode(server.io_ready_clients,ln);
             c->flags &= (~REDIS_IO_WAIT);

-            server.vm_blocked_clients--;
+            server.cache_blocked_clients--;

             aeCreateFileEvent(server.el, c->fd, AE_READABLE,
                 readQueryFromClient, c);
             cmd = lookupCommand(c->argv[0]->ptr);
             aeCreateFileEvent(server.el, c->fd, AE_READABLE,
                 readQueryFromClient, c);
             cmd = lookupCommand(c->argv[0]->ptr);


@@ -674,6 +679,19 @@ void beforeSleep(struct aeEventLoop *eventLoop) {
                 processInputBuffer(c);
         }
     }
                 processInputBuffer(c);
         }
     }

+
+    /* Try to process pending commands for clients that were just unblocked. */
+    while (listLength(server.unblocked_clients)) {
+        ln = listFirst(server.unblocked_clients);
+        redisAssert(ln != NULL);
+        c = ln->value;
+        listDelNode(server.unblocked_clients,ln);
+
+        /* Process remaining data in the input buffer. */
+        if (c->querybuf && sdslen(c->querybuf) > 0)
+            processInputBuffer(c);
+    }
+

     /* Write the AOF buffer on disk */
     flushAppendOnlyFile();
 }
     /* Write the AOF buffer on disk */
     flushAppendOnlyFile();
 }


@@ -749,7 +767,6 @@ void initServerConfig() {
     server.syslog_enabled = 0;
     server.syslog_ident = zstrdup("redis");
     server.syslog_facility = LOG_LOCAL0;
     server.syslog_enabled = 0;
     server.syslog_ident = zstrdup("redis");
     server.syslog_facility = LOG_LOCAL0;

-    server.glueoutputbuf = 1;

     server.daemonize = 0;
     server.appendonly = 0;
     server.appendfsync = APPENDFSYNC_EVERYSEC;
     server.daemonize = 0;
     server.appendonly = 0;
     server.appendfsync = APPENDFSYNC_EVERYSEC;


@@ -764,23 +781,21 @@ void initServerConfig() {
     server.rdbcompression = 1;
     server.activerehashing = 1;
     server.maxclients = 0;
     server.rdbcompression = 1;
     server.activerehashing = 1;
     server.maxclients = 0;

-    server.blpop_blocked_clients = 0;
+    server.bpop_blocked_clients = 0;

     server.maxmemory = 0;
     server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
     server.maxmemory_samples = 3;
     server.maxmemory = 0;
     server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
     server.maxmemory_samples = 3;

-    server.vm_enabled = 0;
-    server.vm_swap_file = zstrdup("/tmp/redis-%p.vm");
-    server.vm_page_size = 256;          /* 256 bytes per page */
-    server.vm_pages = 1024*1024*100;    /* 104 millions of pages */
-    server.vm_max_memory = 1024LL*1024*1024*1; /* 1 GB of RAM */
-    server.vm_max_threads = 4;
-    server.vm_blocked_clients = 0;
+    server.ds_enabled = 0;
+    server.ds_path = sdsnew("/tmp/redis.ds");
+    server.cache_max_memory = 64LL*1024*1024; /* 64 MB of RAM */
+    server.cache_blocked_clients = 0;

     server.hash_max_zipmap_entries = REDIS_HASH_MAX_ZIPMAP_ENTRIES;
     server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE;
     server.list_max_ziplist_entries = REDIS_LIST_MAX_ZIPLIST_ENTRIES;
     server.list_max_ziplist_value = REDIS_LIST_MAX_ZIPLIST_VALUE;
     server.set_max_intset_entries = REDIS_SET_MAX_INTSET_ENTRIES;
     server.shutdown_asap = 0;
     server.hash_max_zipmap_entries = REDIS_HASH_MAX_ZIPMAP_ENTRIES;
     server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE;
     server.list_max_ziplist_entries = REDIS_LIST_MAX_ZIPLIST_ENTRIES;
     server.list_max_ziplist_value = REDIS_LIST_MAX_ZIPLIST_VALUE;
     server.set_max_intset_entries = REDIS_SET_MAX_INTSET_ENTRIES;
     server.shutdown_asap = 0;

+    server.cache_flush_delay = 0;

 
     updateLRUClock();
     resetServerSaveParams();
 
     updateLRUClock();
     resetServerSaveParams();


@@ -828,6 +843,9 @@ void initServer() {
     server.clients = listCreate();
     server.slaves = listCreate();
     server.monitors = listCreate();
     server.clients = listCreate();
     server.slaves = listCreate();
     server.monitors = listCreate();

+    server.unblocked_clients = listCreate();
+    server.cache_io_queue = listCreate();
+

     createSharedObjects();
     server.el = aeCreateEventLoop();
     server.db = zmalloc(sizeof(redisDb)*server.dbnum);
     createSharedObjects();
     server.el = aeCreateEventLoop();
     server.db = zmalloc(sizeof(redisDb)*server.dbnum);


@@ -853,8 +871,11 @@ void initServer() {
         server.db[j].expires = dictCreate(&keyptrDictType,NULL);
         server.db[j].blocking_keys = dictCreate(&keylistDictType,NULL);
         server.db[j].watched_keys = dictCreate(&keylistDictType,NULL);
         server.db[j].expires = dictCreate(&keyptrDictType,NULL);
         server.db[j].blocking_keys = dictCreate(&keylistDictType,NULL);
         server.db[j].watched_keys = dictCreate(&keylistDictType,NULL);

-        if (server.vm_enabled)
+        if (server.ds_enabled) {

             server.db[j].io_keys = dictCreate(&keylistDictType,NULL);
             server.db[j].io_keys = dictCreate(&keylistDictType,NULL);

+            server.db[j].io_negcache = dictCreate(&setDictType,NULL);
+            server.db[j].io_queued = dictCreate(&setDictType,NULL);
+        }

         server.db[j].id = j;
     }
     server.pubsub_channels = dictCreate(&keylistDictType,NULL);
         server.db[j].id = j;
     }
     server.pubsub_channels = dictCreate(&keylistDictType,NULL);


@@ -864,6 +885,8 @@ void initServer() {
     server.cronloops = 0;
     server.bgsavechildpid = -1;
     server.bgrewritechildpid = -1;
     server.cronloops = 0;
     server.bgsavechildpid = -1;
     server.bgrewritechildpid = -1;

+    server.bgsavethread_state = REDIS_BGSAVE_THREAD_UNACTIVE;
+    server.bgsavethread = (pthread_t) -1;

     server.bgrewritebuf = sdsempty();
     server.aofbuf = sdsempty();
     server.lastsave = time(NULL);
     server.bgrewritebuf = sdsempty();
     server.aofbuf = sdsempty();
     server.lastsave = time(NULL);


@@ -871,6 +894,7 @@ void initServer() {
     server.stat_numcommands = 0;
     server.stat_numconnections = 0;
     server.stat_expiredkeys = 0;
     server.stat_numcommands = 0;
     server.stat_numconnections = 0;
     server.stat_expiredkeys = 0;

+    server.stat_evictedkeys = 0;

     server.stat_starttime = time(NULL);
     server.stat_keyspace_misses = 0;
     server.stat_keyspace_hits = 0;
     server.stat_starttime = time(NULL);
     server.stat_keyspace_misses = 0;
     server.stat_keyspace_hits = 0;


@@ -890,7 +914,7 @@ void initServer() {
         }
     }
 
         }
     }
 

-    if (server.vm_enabled) vmInit();
+    if (server.ds_enabled) dsInit();

 }
 
 /* Populates the Redis Command Table starting from the hard coded list
 }
 
 /* Populates the Redis Command Table starting from the hard coded list


@@ -1029,8 +1053,8 @@ int processCommand(redisClient *c) {
         queueMultiCommand(c,cmd);
         addReply(c,shared.queued);
     } else {
         queueMultiCommand(c,cmd);
         addReply(c,shared.queued);
     } else {

-        if (server.vm_enabled && server.vm_max_threads > 0 &&
-            blockClientOnSwappedKeys(c,cmd)) return REDIS_ERR;
+        if (server.ds_enabled && blockClientOnSwappedKeys(c,cmd))
+            return REDIS_ERR;

         call(c,cmd);
     }
     return REDIS_OK;
         call(c,cmd);
     }
     return REDIS_OK;


@@ -1048,10 +1072,11 @@ int prepareForShutdown() {
         kill(server.bgsavechildpid,SIGKILL);
         rdbRemoveTempFile(server.bgsavechildpid);
     }
         kill(server.bgsavechildpid,SIGKILL);
         rdbRemoveTempFile(server.bgsavechildpid);
     }

-    if (server.appendonly) {
+    if (server.ds_enabled) {
+        /* FIXME: flush all objects on disk */
+    } else if (server.appendonly) {

         /* Append only file: fsync() the AOF and exit */
         aof_fsync(server.appendfd);
         /* Append only file: fsync() the AOF and exit */
         aof_fsync(server.appendfd);

-        if (server.vm_enabled) unlink(server.vm_swap_file);

     } else if (server.saveparamslen > 0) {
         /* Snapshotting. Perform a SYNC SAVE and exit */
         if (rdbSave(server.dbfilename) != REDIS_OK) {
     } else if (server.saveparamslen > 0) {
         /* Snapshotting. Perform a SYNC SAVE and exit */
         if (rdbSave(server.dbfilename) != REDIS_OK) {


@@ -1157,13 +1182,14 @@ sds genRedisInfoString(void) {
         "total_connections_received:%lld\r\n"
         "total_commands_processed:%lld\r\n"
         "expired_keys:%lld\r\n"
         "total_connections_received:%lld\r\n"
         "total_commands_processed:%lld\r\n"
         "expired_keys:%lld\r\n"

+        "evicted_keys:%lld\r\n"

         "keyspace_hits:%lld\r\n"
         "keyspace_misses:%lld\r\n"
         "hash_max_zipmap_entries:%zu\r\n"
         "hash_max_zipmap_value:%zu\r\n"
         "pubsub_channels:%ld\r\n"
         "pubsub_patterns:%u\r\n"
         "keyspace_hits:%lld\r\n"
         "keyspace_misses:%lld\r\n"
         "hash_max_zipmap_entries:%zu\r\n"
         "hash_max_zipmap_value:%zu\r\n"
         "pubsub_channels:%ld\r\n"
         "pubsub_patterns:%u\r\n"

-        "vm_enabled:%d\r\n"
+        "ds_enabled:%d\r\n"

         "role:%s\r\n"
         ,REDIS_VERSION,
         redisGitSHA1(),
         "role:%s\r\n"
         ,REDIS_VERSION,
         redisGitSHA1(),


@@ -1180,7 +1206,7 @@ sds genRedisInfoString(void) {
         (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000,
         listLength(server.clients)-listLength(server.slaves),
         listLength(server.slaves),
         (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000,
         listLength(server.clients)-listLength(server.slaves),
         listLength(server.slaves),

-        server.blpop_blocked_clients,
+        server.bpop_blocked_clients,

         zmalloc_used_memory(),
         hmem,
         zmalloc_get_rss(),
         zmalloc_used_memory(),
         hmem,
         zmalloc_get_rss(),


@@ -1199,13 +1225,14 @@ sds genRedisInfoString(void) {
         server.stat_numconnections,
         server.stat_numcommands,
         server.stat_expiredkeys,
         server.stat_numconnections,
         server.stat_numcommands,
         server.stat_expiredkeys,

+        server.stat_evictedkeys,

         server.stat_keyspace_hits,
         server.stat_keyspace_misses,
         server.hash_max_zipmap_entries,
         server.hash_max_zipmap_value,
         dictSize(server.pubsub_channels),
         listLength(server.pubsub_patterns),
         server.stat_keyspace_hits,
         server.stat_keyspace_misses,
         server.hash_max_zipmap_entries,
         server.hash_max_zipmap_value,
         dictSize(server.pubsub_channels),
         listLength(server.pubsub_patterns),

-        server.vm_enabled != 0,
+        server.ds_enabled != 0,

         server.masterhost == NULL ? "master" : "slave"
     );
     if (server.masterhost) {
         server.masterhost == NULL ? "master" : "slave"
     );
     if (server.masterhost) {


@@ -1232,33 +1259,13 @@ sds genRedisInfoString(void) {
             );
         }
     }
             );
         }
     }

-    if (server.vm_enabled) {
+    if (server.ds_enabled) {

         lockThreadedIO();
         info = sdscatprintf(info,
         lockThreadedIO();
         info = sdscatprintf(info,

-            "vm_conf_max_memory:%llu\r\n"
-            "vm_conf_page_size:%llu\r\n"
-            "vm_conf_pages:%llu\r\n"
-            "vm_stats_used_pages:%llu\r\n"
-            "vm_stats_swapped_objects:%llu\r\n"
-            "vm_stats_swappin_count:%llu\r\n"
-            "vm_stats_swappout_count:%llu\r\n"
-            "vm_stats_io_newjobs_len:%lu\r\n"
-            "vm_stats_io_processing_len:%lu\r\n"
-            "vm_stats_io_processed_len:%lu\r\n"
-            "vm_stats_io_active_threads:%lu\r\n"
-            "vm_stats_blocked_clients:%lu\r\n"
-            ,(unsigned long long) server.vm_max_memory,
-            (unsigned long long) server.vm_page_size,
-            (unsigned long long) server.vm_pages,
-            (unsigned long long) server.vm_stats_used_pages,
-            (unsigned long long) server.vm_stats_swapped_objects,
-            (unsigned long long) server.vm_stats_swapins,
-            (unsigned long long) server.vm_stats_swapouts,
-            (unsigned long) listLength(server.io_newjobs),
-            (unsigned long) listLength(server.io_processing),
-            (unsigned long) listLength(server.io_processed),
-            (unsigned long) server.io_active_threads,
-            (unsigned long) server.vm_blocked_clients
+            "cache_max_memory:%llu\r\n"
+            "cache_blocked_clients:%lu\r\n"
+            ,(unsigned long long) server.cache_max_memory,
+            (unsigned long) server.cache_blocked_clients

         );
         unlockThreadedIO();
     }
         );
         unlockThreadedIO();
     }


@@ -1416,44 +1423,13 @@ void freeMemoryIfNeeded(void) {
             if (bestkey) {
                 robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
                 dbDelete(db,keyobj);
             if (bestkey) {
                 robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
                 dbDelete(db,keyobj);

-                server.stat_expiredkeys++;
+                server.stat_evictedkeys++;

                 decrRefCount(keyobj);
                 freed++;
             }
         }
         if (!freed) return; /* nothing to free... */
     }
                 decrRefCount(keyobj);
                 freed++;
             }
         }
         if (!freed) return; /* nothing to free... */
     }

-
-    while(0) {
-        int j, k, freed = 0;
-        for (j = 0; j < server.dbnum; j++) {
-            int minttl = -1;
-            sds minkey = NULL;
-            robj *keyobj = NULL;
-            struct dictEntry *de;
-
-            if (dictSize(server.db[j].expires)) {
-                freed = 1;
-                /* From a sample of three keys drop the one nearest to
-                 * the natural expire */
-                for (k = 0; k < 3; k++) {
-                    time_t t;
-
-                    de = dictGetRandomKey(server.db[j].expires);
-                    t = (time_t) dictGetEntryVal(de);
-                    if (minttl == -1 || t < minttl) {
-                        minkey = dictGetEntryKey(de);
-                        minttl = t;
-                    }
-                }
-                keyobj = createStringObject(minkey,sdslen(minkey));
-                dbDelete(server.db+j,keyobj);
-                server.stat_expiredkeys++;
-                decrRefCount(keyobj);
-            }
-        }
-        if (!freed) return; /* nothing to free... */
-    }

 }
 
 /* =================================== Main! ================================ */
 }
 
 /* =================================== Main! ================================ */


@@ -1484,7 +1460,7 @@ void createPidFile(void) {
     /* Try to write the pid file in a best-effort way. */
     FILE *fp = fopen(server.pidfile,"w");
     if (fp) {
     /* Try to write the pid file in a best-effort way. */
     FILE *fp = fopen(server.pidfile,"w");
     if (fp) {

-        fprintf(fp,"%d\n",getpid());
+        fprintf(fp,"%d\n",(int)getpid());

         fclose(fp);
     }
 }
         fclose(fp);
     }
 }


@@ -1541,7 +1517,9 @@ int main(int argc, char **argv) {
     linuxOvercommitMemoryWarning();
 #endif
     start = time(NULL);
     linuxOvercommitMemoryWarning();
 #endif
     start = time(NULL);

-    if (server.appendonly) {
+    if (server.ds_enabled) {
+        redisLog(REDIS_NOTICE,"DB not loaded (running with disk back end)");
+    } else if (server.appendonly) {

         if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
             redisLog(REDIS_NOTICE,"DB loaded from append only file: %ld seconds",time(NULL)-start);
     } else {
         if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
             redisLog(REDIS_NOTICE,"DB loaded from append only file: %ld seconds",time(NULL)-start);
     } else {