redis-benchmark hopefully last bug with multi bulk reply fixed

[redis.git] / redis.c

diff --git a/redis.c b/redis.c
index 839b0b3b37c066ac7c6b504c13f5ecf5fef5085b..df3b413192bc98cda7c2460968fdb7e37eb785ca 100644 (file)
--- a/redis.c
+++ b/redis.c
@@ -56,6 +56,7 @@
 #include <fcntl.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <fcntl.h>
 #include <sys/time.h>
 #include <sys/resource.h>

+#include <sys/uio.h>

 #include <limits.h>
 #include <math.h>
 
 #include <limits.h>
 #include <math.h>
 


@@ -89,7 +90,12 @@
 #define REDIS_MAX_SYNC_TIME     60      /* Slave can't take more to sync */
 #define REDIS_EXPIRELOOKUPS_PER_CRON    100 /* try to expire 100 keys/second */
 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)
 #define REDIS_MAX_SYNC_TIME     60      /* Slave can't take more to sync */
 #define REDIS_EXPIRELOOKUPS_PER_CRON    100 /* try to expire 100 keys/second */
 #define REDIS_MAX_WRITE_PER_EVENT (1024*64)

-#define REDIS_REQUEST_MAX_SIZE  (1024*1024*256) /* max bytes in inline command */
+#define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
+
+/* If more then REDIS_WRITEV_THRESHOLD write packets are pending use writev */
+#define REDIS_WRITEV_THRESHOLD      3
+/* Max number of iovecs used for each writev call */
+#define REDIS_WRITEV_IOVEC_COUNT    256

 
 /* Hash table parameters */
 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
 
 /* Hash table parameters */
 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */


@@ -172,11 +178,8 @@
 
 /* Sort operations */
 #define REDIS_SORT_GET 0
 
 /* Sort operations */
 #define REDIS_SORT_GET 0

-#define REDIS_SORT_DEL 1
-#define REDIS_SORT_INCR 2
-#define REDIS_SORT_DECR 3
-#define REDIS_SORT_ASC 4
-#define REDIS_SORT_DESC 5
+#define REDIS_SORT_ASC 1
+#define REDIS_SORT_DESC 2

 #define REDIS_SORTKEY_MAX 1024
 
 /* Log levels */
 #define REDIS_SORTKEY_MAX 1024
 
 /* Log levels */


@@ -284,6 +287,7 @@ struct redisServer {
     int shareobjects;
     /* Replication related */
     int isslave;
     int shareobjects;
     /* Replication related */
     int isslave;

+    char *masterauth;

     char *masterhost;
     int masterport;
     redisClient *master;    /* client that is master for this slave */
     char *masterhost;
     int masterport;
     redisClient *master;    /* client that is master for this slave */


@@ -396,6 +400,7 @@ static void processInputBuffer(redisClient *c);
 static zskiplist *zslCreate(void);
 static void zslFree(zskiplist *zsl);
 static void zslInsert(zskiplist *zsl, double score, robj *obj);
 static zskiplist *zslCreate(void);
 static void zslFree(zskiplist *zsl);
 static void zslInsert(zskiplist *zsl, double score, robj *obj);

+static void sendReplyToClientWritev(aeEventLoop *el, int fd, void *privdata, int mask);

 
 static void authCommand(redisClient *c);
 static void pingCommand(redisClient *c);
 
 static void authCommand(redisClient *c);
 static void pingCommand(redisClient *c);


@@ -448,6 +453,7 @@ static void flushdbCommand(redisClient *c);
 static void flushallCommand(redisClient *c);
 static void sortCommand(redisClient *c);
 static void lremCommand(redisClient *c);
 static void flushallCommand(redisClient *c);
 static void sortCommand(redisClient *c);
 static void lremCommand(redisClient *c);

+static void rpoplpushcommand(redisClient *c);

 static void infoCommand(redisClient *c);
 static void mgetCommand(redisClient *c);
 static void monitorCommand(redisClient *c);
 static void infoCommand(redisClient *c);
 static void mgetCommand(redisClient *c);
 static void monitorCommand(redisClient *c);


@@ -491,6 +497,7 @@ static struct redisCommand cmdTable[] = {
     {"lrange",lrangeCommand,4,REDIS_CMD_INLINE},
     {"ltrim",ltrimCommand,4,REDIS_CMD_INLINE},
     {"lrem",lremCommand,4,REDIS_CMD_BULK},
     {"lrange",lrangeCommand,4,REDIS_CMD_INLINE},
     {"ltrim",ltrimCommand,4,REDIS_CMD_INLINE},
     {"lrem",lremCommand,4,REDIS_CMD_BULK},

+    {"rpoplpush",rpoplpushcommand,3,REDIS_CMD_BULK},

     {"sadd",saddCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
     {"srem",sremCommand,3,REDIS_CMD_BULK},
     {"smove",smoveCommand,4,REDIS_CMD_BULK},
     {"sadd",saddCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM},
     {"srem",sremCommand,3,REDIS_CMD_BULK},
     {"smove",smoveCommand,4,REDIS_CMD_BULK},


@@ -546,6 +553,7 @@ static struct redisCommand cmdTable[] = {
     {"debug",debugCommand,-2,REDIS_CMD_INLINE},
     {NULL,NULL,0,0}
 };
     {"debug",debugCommand,-2,REDIS_CMD_INLINE},
     {NULL,NULL,0,0}
 };

+

 /*============================ Utility functions ============================ */
 
 /* Glob-style pattern matching. */
 /*============================ Utility functions ============================ */
 
 /* Glob-style pattern matching. */


@@ -905,7 +913,7 @@ static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientD
     /* Check if a background saving in progress terminated */
     if (server.bgsaveinprogress) {
         int statloc;
     /* Check if a background saving in progress terminated */
     if (server.bgsaveinprogress) {
         int statloc;

-        if (wait4(-1,&statloc,WNOHANG,NULL)) {
+        if (wait3(&statloc,WNOHANG,NULL)) {

             int exitcode = WEXITSTATUS(statloc);
             int bysignal = WIFSIGNALED(statloc);
 
             int exitcode = WEXITSTATUS(statloc);
             int bysignal = WIFSIGNALED(statloc);
 


@@ -942,14 +950,21 @@ static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientD
          }
     }
 
          }
     }
 

-    /* Try to expire a few timed out keys */
+    /* Try to expire a few timed out keys. The algorithm used is adaptive and
+     * will use few CPU cycles if there are few expiring keys, otherwise
+     * it will get more aggressive to avoid that too much memory is used by
+     * keys that can be removed from the keyspace. */

     for (j = 0; j < server.dbnum; j++) {
     for (j = 0; j < server.dbnum; j++) {

+        int expired;

         redisDb *db = server.db+j;
         redisDb *db = server.db+j;

-        int num = dictSize(db->expires);

 
 

-        if (num) {
+        /* Continue to expire if at the end of the cycle more than 25%
+         * of the keys were expired. */
+        do {
+            int num = dictSize(db->expires);

             time_t now = time(NULL);
 
             time_t now = time(NULL);
 

+            expired = 0;

             if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
                 num = REDIS_EXPIRELOOKUPS_PER_CRON;
             while (num--) {
             if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
                 num = REDIS_EXPIRELOOKUPS_PER_CRON;
             while (num--) {


@@ -960,9 +975,10 @@ static int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientD
                 t = (time_t) dictGetEntryVal(de);
                 if (now > t) {
                     deleteKey(db,dictGetEntryKey(de));
                 t = (time_t) dictGetEntryVal(de);
                 if (now > t) {
                     deleteKey(db,dictGetEntryKey(de));

+                    expired++;

                 }
             }
                 }
             }

-        }
+        } while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4);

     }
 
     /* Check if we should connect to a MASTER */
     }
 
     /* Check if we should connect to a MASTER */


@@ -1019,7 +1035,7 @@ static void appendServerSaveParams(time_t seconds, int changes) {
     server.saveparamslen++;
 }
 
     server.saveparamslen++;
 }
 

-static void ResetServerSaveParams() {
+static void resetServerSaveParams() {

     zfree(server.saveparams);
     server.saveparams = NULL;
     server.saveparamslen = 0;
     zfree(server.saveparams);
     server.saveparams = NULL;
     server.saveparamslen = 0;


@@ -1036,7 +1052,7 @@ static void initServerConfig() {
     server.glueoutputbuf = 1;
     server.daemonize = 0;
     server.appendonly = 0;
     server.glueoutputbuf = 1;
     server.daemonize = 0;
     server.appendonly = 0;

-    server.appendfsync = APPENDFSYNC_NO;
+    server.appendfsync = APPENDFSYNC_ALWAYS;

     server.lastfsync = time(NULL);
     server.appendfd = -1;
     server.appendseldb = -1; /* Make sure the first time will not match */
     server.lastfsync = time(NULL);
     server.appendfd = -1;
     server.appendseldb = -1; /* Make sure the first time will not match */


@@ -1048,13 +1064,14 @@ static void initServerConfig() {
     server.sharingpoolsize = 1024;
     server.maxclients = 0;
     server.maxmemory = 0;
     server.sharingpoolsize = 1024;
     server.maxclients = 0;
     server.maxmemory = 0;

-    ResetServerSaveParams();
+    resetServerSaveParams();

 
     appendServerSaveParams(60*60,1);  /* save after 1 hour and 1 change */
     appendServerSaveParams(300,100);  /* save after 5 minutes and 100 changes */
     appendServerSaveParams(60,10000); /* save after 1 minute and 10000 changes */
     /* Replication related */
     server.isslave = 0;
 
     appendServerSaveParams(60*60,1);  /* save after 1 hour and 1 change */
     appendServerSaveParams(300,100);  /* save after 5 minutes and 100 changes */
     appendServerSaveParams(60,10000); /* save after 1 minute and 10000 changes */
     /* Replication related */
     server.isslave = 0;

+    server.masterauth = NULL;

     server.masterhost = NULL;
     server.masterport = 6379;
     server.master = NULL;
     server.masterhost = NULL;
     server.masterport = 6379;
     server.master = NULL;


@@ -1101,10 +1118,10 @@ static void initServer() {
     server.stat_numcommands = 0;
     server.stat_numconnections = 0;
     server.stat_starttime = time(NULL);
     server.stat_numcommands = 0;
     server.stat_numconnections = 0;
     server.stat_starttime = time(NULL);

-    aeCreateTimeEvent(server.el, 1000, serverCron, NULL, NULL);
+    aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL);

 
     if (server.appendonly) {
 
     if (server.appendonly) {

-        server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT);
+        server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644);

         if (server.appendfd == -1) {
             redisLog(REDIS_WARNING, "Can't open the append-only file: %s",
                 strerror(errno));
         if (server.appendfd == -1) {
             redisLog(REDIS_WARNING, "Can't open the append-only file: %s",
                 strerror(errno));


@@ -1233,6 +1250,8 @@ static void loadServerConfig(char *filename) {
             server.masterhost = sdsnew(argv[1]);
             server.masterport = atoi(argv[2]);
             server.replstate = REDIS_REPL_CONNECT;
             server.masterhost = sdsnew(argv[1]);
             server.masterport = atoi(argv[2]);
             server.replstate = REDIS_REPL_CONNECT;

+        } else if (!strcasecmp(argv[0],"masterauth") && argc == 2) {
+               server.masterauth = zstrdup(argv[1]);

         } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
             if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
         } else if (!strcasecmp(argv[0],"glueoutputbuf") && argc == 2) {
             if ((server.glueoutputbuf = yesnotoi(argv[1])) == -1) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;


@@ -1255,11 +1274,11 @@ static void loadServerConfig(char *filename) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
             }
         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
             }
         } else if (!strcasecmp(argv[0],"appendfsync") && argc == 2) {

-            if (strcasecmp(argv[1],"no")) {
+            if (!strcasecmp(argv[1],"no")) {

                 server.appendfsync = APPENDFSYNC_NO;
                 server.appendfsync = APPENDFSYNC_NO;

-            } else if (strcasecmp(argv[1],"always")) {
+            } else if (!strcasecmp(argv[1],"always")) {

                 server.appendfsync = APPENDFSYNC_ALWAYS;
                 server.appendfsync = APPENDFSYNC_ALWAYS;

-            } else if (strcasecmp(argv[1],"everysec")) {
+            } else if (!strcasecmp(argv[1],"everysec")) {

                 server.appendfsync = APPENDFSYNC_EVERYSEC;
             } else {
                 err = "argument must be 'no', 'always' or 'everysec'";
                 server.appendfsync = APPENDFSYNC_EVERYSEC;
             } else {
                 err = "argument must be 'no', 'always' or 'everysec'";


@@ -1330,34 +1349,31 @@ static void freeClient(redisClient *c) {
     zfree(c);
 }
 
     zfree(c);
 }
 

+#define GLUEREPLY_UP_TO (1024)

 static void glueReplyBuffersIfNeeded(redisClient *c) {
 static void glueReplyBuffersIfNeeded(redisClient *c) {

-    int totlen = 0;
+    int copylen = 0;
+    char buf[GLUEREPLY_UP_TO];

     listNode *ln;
     robj *o;
 
     listRewind(c->reply);
     while((ln = listYield(c->reply))) {
     listNode *ln;
     robj *o;
 
     listRewind(c->reply);
     while((ln = listYield(c->reply))) {

+        int objlen;
+

         o = ln->value;
         o = ln->value;

-        totlen += sdslen(o->ptr);
-        /* This optimization makes more sense if we don't have to copy
-         * too much data */
-        if (totlen > 1024) return;
-    }
-    if (totlen > 0) {
-        char buf[1024];
-        int copylen = 0;
-
-        listRewind(c->reply);
-        while((ln = listYield(c->reply))) {
-            o = ln->value;
-            memcpy(buf+copylen,o->ptr,sdslen(o->ptr));
-            copylen += sdslen(o->ptr);
+        objlen = sdslen(o->ptr);
+        if (copylen + objlen <= GLUEREPLY_UP_TO) {
+            memcpy(buf+copylen,o->ptr,objlen);
+            copylen += objlen;

             listDelNode(c->reply,ln);
             listDelNode(c->reply,ln);

+        } else {
+            if (copylen == 0) return;
+            break;

         }
         }

-        /* Now the output buffer is empty, add the new single element */
-        o = createObject(REDIS_STRING,sdsnewlen(buf,totlen));
-        listAddNodeTail(c->reply,o);

     }
     }

+    /* Now the output buffer is empty, add the new single element */
+    o = createObject(REDIS_STRING,sdsnewlen(buf,copylen));
+    listAddNodeHead(c->reply,o);

 }
 
 static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask) {
 }
 
 static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask) {


@@ -1367,9 +1383,22 @@ static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask)
     REDIS_NOTUSED(el);
     REDIS_NOTUSED(mask);
 
     REDIS_NOTUSED(el);
     REDIS_NOTUSED(mask);
 

-    if (server.glueoutputbuf && listLength(c->reply) > 1)
-        glueReplyBuffersIfNeeded(c);
+
+    /* Use writev() if we have enough buffers to send */
+    #if 0
+    if (!server.glueoutputbuf &&
+        listLength(c->reply) > REDIS_WRITEV_THRESHOLD && 
+        !(c->flags & REDIS_MASTER))
+    {
+        sendReplyToClientWritev(el, fd, privdata, mask);
+        return;
+    }
+    #endif
+

     while(listLength(c->reply)) {
     while(listLength(c->reply)) {

+        if (server.glueoutputbuf && listLength(c->reply) > 1)
+            glueReplyBuffersIfNeeded(c);
+

         o = listNodeValue(listFirst(c->reply));
         objlen = sdslen(o->ptr);
 
         o = listNodeValue(listFirst(c->reply));
         objlen = sdslen(o->ptr);
 


@@ -1393,10 +1422,10 @@ static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask)
             c->sentlen = 0;
         }
         /* Note that we avoid to send more thank REDIS_MAX_WRITE_PER_EVENT
             c->sentlen = 0;
         }
         /* Note that we avoid to send more thank REDIS_MAX_WRITE_PER_EVENT

-         * bytes, in a single threaded server it's a good idea to server
+         * bytes, in a single threaded server it's a good idea to serve

          * other clients as well, even if a very large request comes from
          * super fast link that is always able to accept data (in real world
          * other clients as well, even if a very large request comes from
          * super fast link that is always able to accept data (in real world

-         * terms think to 'KEYS *' against the loopback interfae) */
+         * scenario think about 'KEYS *' against the loopback interfae) */

         if (totwritten > REDIS_MAX_WRITE_PER_EVENT) break;
     }
     if (nwritten == -1) {
         if (totwritten > REDIS_MAX_WRITE_PER_EVENT) break;
     }
     if (nwritten == -1) {


@@ -1416,6 +1445,84 @@ static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask)
     }
 }
 
     }
 }
 

+static void sendReplyToClientWritev(aeEventLoop *el, int fd, void *privdata, int mask)
+{
+    redisClient *c = privdata;
+    int nwritten = 0, totwritten = 0, objlen, willwrite;
+    robj *o;
+    struct iovec iov[REDIS_WRITEV_IOVEC_COUNT];
+    int offset, ion = 0;
+    REDIS_NOTUSED(el);
+    REDIS_NOTUSED(mask);
+
+    listNode *node;
+    while (listLength(c->reply)) {
+        offset = c->sentlen;
+        ion = 0;
+        willwrite = 0;
+
+        /* fill-in the iov[] array */
+        for(node = listFirst(c->reply); node; node = listNextNode(node)) {
+            o = listNodeValue(node);
+            objlen = sdslen(o->ptr);
+
+            if (totwritten + objlen - offset > REDIS_MAX_WRITE_PER_EVENT) 
+                break;
+
+            if(ion == REDIS_WRITEV_IOVEC_COUNT)
+                break; /* no more iovecs */
+
+            iov[ion].iov_base = ((char*)o->ptr) + offset;
+            iov[ion].iov_len = objlen - offset;
+            willwrite += objlen - offset;
+            offset = 0; /* just for the first item */
+            ion++;
+        }
+
+        if(willwrite == 0)
+            break;
+
+        /* write all collected blocks at once */
+        if((nwritten = writev(fd, iov, ion)) < 0) {
+            if (errno != EAGAIN) {
+                redisLog(REDIS_DEBUG,
+                         "Error writing to client: %s", strerror(errno));
+                freeClient(c);
+                return;
+            }
+            break;
+        }
+
+        totwritten += nwritten;
+        offset = c->sentlen;
+
+        /* remove written robjs from c->reply */
+        while (nwritten && listLength(c->reply)) {
+            o = listNodeValue(listFirst(c->reply));
+            objlen = sdslen(o->ptr);
+
+            if(nwritten >= objlen - offset) {
+                listDelNode(c->reply, listFirst(c->reply));
+                nwritten -= objlen - offset;
+                c->sentlen = 0;
+            } else {
+                /* partial write */
+                c->sentlen += nwritten;
+                break;
+            }
+            offset = 0;
+        }
+    }
+
+    if (totwritten > 0) 
+        c->lastinteraction = time(NULL);
+
+    if (listLength(c->reply) == 0) {
+        c->sentlen = 0;
+        aeDeleteFileEvent(server.el,c->fd,AE_WRITABLE);
+    }
+}
+

 static struct redisCommand *lookupCommand(char *name) {
     int j = 0;
     while(cmdTable[j].name != NULL) {
 static struct redisCommand *lookupCommand(char *name) {
     int j = 0;
     while(cmdTable[j].name != NULL) {


@@ -1580,9 +1687,9 @@ static int processCommand(redisClient *c) {
     /* Exec the command */
     dirty = server.dirty;
     cmd->proc(c);
     /* Exec the command */
     dirty = server.dirty;
     cmd->proc(c);

-    if (server.appendonly != 0)
+    if (server.appendonly && server.dirty-dirty)

         feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc);
         feedAppendOnlyFile(cmd,c->db->id,c->argv,c->argc);

-    if (server.dirty-dirty != 0 && listLength(server.slaves))
+    if (server.dirty-dirty && listLength(server.slaves))

         replicationFeedSlaves(server.slaves,cmd,c->db->id,c->argv,c->argc);
     if (listLength(server.monitors))
         replicationFeedSlaves(server.monitors,cmd,c->db->id,c->argv,c->argc);
         replicationFeedSlaves(server.slaves,cmd,c->db->id,c->argv,c->argc);
     if (listLength(server.monitors))
         replicationFeedSlaves(server.monitors,cmd,c->db->id,c->argv,c->argc);


@@ -1666,63 +1773,6 @@ static void replicationFeedSlaves(list *slaves, struct redisCommand *cmd, int di
     if (outv != static_outv) zfree(outv);
 }
 
     if (outv != static_outv) zfree(outv);
 }
 

-/* TODO: translate EXPIREs into EXPIRETOs */
-static void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc) {
-    sds buf = sdsempty();
-    int j;
-    ssize_t nwritten;
-    time_t now;
-
-    /* The DB this command was targetting is not the same as the last command
-     * we appendend. To issue a SELECT command is needed. */
-    if (dictid != server.appendseldb) {
-        char seldb[64];
-
-        snprintf(seldb,sizeof(seldb),"%d",dictid);
-        buf = sdscatprintf(buf,"*2\r\n$6\r\nSELECT\r\n$%d\r\n%s\r\n",
-            strlen(seldb),seldb);
-        server.appendseldb = dictid;
-    }
-    /* Append the actual command */
-    buf = sdscatprintf(buf,"*%d\r\n",argc);
-    for (j = 0; j < argc; j++) {
-        robj *o = argv[j];
-
-        if (o->encoding != REDIS_ENCODING_RAW)
-            o = getDecodedObject(o);
-        buf = sdscatprintf(buf,"$%d\r\n",sdslen(o->ptr));
-        buf = sdscatlen(buf,o->ptr,sdslen(o->ptr));
-        buf = sdscatlen(buf,"\r\n",2);
-        if (o != argv[j])
-            decrRefCount(o);
-    }
-    /* We want to perform a single write. This should be guaranteed atomic
-     * at least if the filesystem we are writing is a real physical one.
-     * While this will save us against the server being killed I don't think
-     * there is much to do about the whole server stopping for power problems
-     * or alike */
-     nwritten = write(server.appendfd,buf,sdslen(buf));
-     if (nwritten != (unsigned)sdslen(buf)) {
-        /* Ooops, we are in troubles. The best thing to do for now is
-         * to simply exit instead to give the illusion that everything is
-         * working as expected. */
-         if (nwritten == -1) {
-            redisLog(REDIS_WARNING,"Aborting on error writing to the append-only file: %s",strerror(errno));
-         } else {
-            redisLog(REDIS_WARNING,"Aborting on short write while writing to the append-only file: %s",strerror(errno));
-         }
-         abort();
-    }
-    now = time(NULL);
-    if (server.appendfsync == APPENDFSYNC_ALWAYS ||
-        (server.appendfsync == APPENDFSYNC_EVERYSEC &&
-         now-server.lastfsync > 1))
-    {
-        fsync(server.appendfd); /* Let's try to get this data on the disk */
-        server.lastfsync = now;
-    }
-}
-

 static void processInputBuffer(redisClient *c) {
 again:
     if (c->bulklen == -1) {
 static void processInputBuffer(redisClient *c) {
 again:
     if (c->bulklen == -1) {


@@ -1938,7 +1988,9 @@ static void acceptHandler(aeEventLoop *el, int fd, void *privdata, int mask) {
         char *err = "-ERR max number of clients reached\r\n";
 
         /* That's a best effort error message, don't check write errors */
         char *err = "-ERR max number of clients reached\r\n";
 
         /* That's a best effort error message, don't check write errors */

-        (void) write(c->fd,err,strlen(err));
+        if (write(c->fd,err,strlen(err)) == -1) {
+            /* Nothing to do, Just to avoid the warning... */
+        }

         freeClient(c);
         return;
     }
         freeClient(c);
         return;
     }


@@ -2391,7 +2443,7 @@ static int rdbSaveDoubleValue(FILE *fp, double val) {
         len = 1;
         buf[0] = (val < 0) ? 255 : 254;
     } else {
         len = 1;
         buf[0] = (val < 0) ? 255 : 254;
     } else {

-        snprintf((char*)buf+1,sizeof(buf)-1,"%.16g",val);
+        snprintf((char*)buf+1,sizeof(buf)-1,"%.17g",val);

         buf[0] = strlen((char*)buf);
         len = buf[0]+1;
     }
         buf[0] = strlen((char*)buf);
         len = buf[0]+1;
     }


@@ -2811,7 +2863,7 @@ static int rdbLoad(char *filename) {
 
 eoferr: /* unexpected end of file is handled here with a fatal exit */
     if (keyobj) decrRefCount(keyobj);
 
 eoferr: /* unexpected end of file is handled here with a fatal exit */
     if (keyobj) decrRefCount(keyobj);

-    redisLog(REDIS_WARNING,"Short read or OOM loading DB. Unrecoverable error, exiting now.");
+    redisLog(REDIS_WARNING,"Short read or OOM loading DB. Unrecoverable error, aborting now.");

     exit(1);
     return REDIS_ERR; /* Just to avoid warning */
 }
     exit(1);
     return REDIS_ERR; /* Just to avoid warning */
 }


@@ -3082,6 +3134,7 @@ static void typeCommand(redisClient *c) {
         case REDIS_STRING: type = "+string"; break;
         case REDIS_LIST: type = "+list"; break;
         case REDIS_SET: type = "+set"; break;
         case REDIS_STRING: type = "+string"; break;
         case REDIS_LIST: type = "+list"; break;
         case REDIS_SET: type = "+set"; break;

+        case REDIS_ZSET: type = "+zset"; break;

         default: type = "unknown"; break;
         }
     }
         default: type = "unknown"; break;
         }
     }


@@ -3514,6 +3567,70 @@ static void lremCommand(redisClient *c) {
     }
 }
 
     }
 }
 

+/* This is the semantic of this command:
+ *  RPOPLPUSH srclist dstlist:
+ *   IF LLEN(srclist) > 0
+ *     element = RPOP srclist
+ *     LPUSH dstlist element
+ *     RETURN element
+ *   ELSE
+ *     RETURN nil
+ *   END
+ *  END
+ *
+ * The idea is to be able to get an element from a list in a reliable way
+ * since the element is not just returned but pushed against another list
+ * as well. This command was originally proposed by Ezra Zygmuntowicz.
+ */
+static void rpoplpushcommand(redisClient *c) {
+    robj *sobj;
+
+    sobj = lookupKeyWrite(c->db,c->argv[1]);
+    if (sobj == NULL) {
+        addReply(c,shared.nullbulk);
+    } else {
+        if (sobj->type != REDIS_LIST) {
+            addReply(c,shared.wrongtypeerr);
+        } else {
+            list *srclist = sobj->ptr;
+            listNode *ln = listLast(srclist);
+
+            if (ln == NULL) {
+                addReply(c,shared.nullbulk);
+            } else {
+                robj *dobj = lookupKeyWrite(c->db,c->argv[2]);
+                robj *ele = listNodeValue(ln);
+                list *dstlist;
+
+                if (dobj == NULL) {
+
+                    /* Create the list if the key does not exist */
+                    dobj = createListObject();
+                    dictAdd(c->db->dict,c->argv[2],dobj);
+                    incrRefCount(c->argv[2]);
+                } else if (dobj->type != REDIS_LIST) {
+                    addReply(c,shared.wrongtypeerr);
+                    return;
+                }
+                /* Add the element to the target list */
+                dstlist = dobj->ptr;
+                listAddNodeHead(dstlist,ele);
+                incrRefCount(ele);
+
+                /* Send the element to the client as reply as well */
+                addReplyBulkLen(c,ele);
+                addReply(c,ele);
+                addReply(c,shared.crlf);
+
+                /* Finally remove the element from the source list */
+                listDelNode(srclist,ln);
+                server.dirty++;
+            }
+        }
+    }
+}
+
+

 /* ==================================== Sets ================================ */
 
 static void saddCommand(redisClient *c) {
 /* ==================================== Sets ================================ */
 
 static void saddCommand(redisClient *c) {


@@ -4350,7 +4467,7 @@ static void zscoreCommand(redisClient *c) {
     
     o = lookupKeyRead(c->db,c->argv[1]);
     if (o == NULL) {
     
     o = lookupKeyRead(c->db,c->argv[1]);
     if (o == NULL) {

-        addReply(c,shared.czero);
+        addReply(c,shared.nullbulk);

         return;
     } else {
         if (o->type != REDIS_ZSET) {
         return;
     } else {
         if (o->type != REDIS_ZSET) {


@@ -4366,7 +4483,7 @@ static void zscoreCommand(redisClient *c) {
                 char buf[128];
                 double *score = dictGetEntryVal(de);
 
                 char buf[128];
                 double *score = dictGetEntryVal(de);
 

-                snprintf(buf,sizeof(buf),"%.16g",*score);
+                snprintf(buf,sizeof(buf),"%.17g",*score);

                 addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n%s\r\n",
                     strlen(buf),buf));
             }
                 addReplySds(c,sdscatprintf(sdsempty(),"$%d\r\n%s\r\n",
                     strlen(buf),buf));
             }


@@ -4503,7 +4620,7 @@ static void sortCommand(redisClient *c) {
     int limit_start = 0, limit_count = -1, start, end;
     int j, dontsort = 0, vectorlen;
     int getop = 0; /* GET operation counter */
     int limit_start = 0, limit_count = -1, start, end;
     int j, dontsort = 0, vectorlen;
     int getop = 0; /* GET operation counter */

-    robj *sortval, *sortby = NULL;
+    robj *sortval, *sortby = NULL, *storekey = NULL;

     redisSortObject *vector; /* Resulting vector to sort */
 
     /* Lookup the key to sort. It must be of the right types */
     redisSortObject *vector; /* Resulting vector to sort */
 
     /* Lookup the key to sort. It must be of the right types */


@@ -4541,6 +4658,9 @@ static void sortCommand(redisClient *c) {
             limit_start = atoi(c->argv[j+1]->ptr);
             limit_count = atoi(c->argv[j+2]->ptr);
             j+=2;
             limit_start = atoi(c->argv[j+1]->ptr);
             limit_count = atoi(c->argv[j+2]->ptr);
             j+=2;

+        } else if (!strcasecmp(c->argv[j]->ptr,"store") && leftargs >= 1) {
+            storekey = c->argv[j+1];
+            j++;

         } else if (!strcasecmp(c->argv[j]->ptr,"by") && leftargs >= 1) {
             sortby = c->argv[j+1];
             /* If the BY pattern does not contain '*', i.e. it is constant,
         } else if (!strcasecmp(c->argv[j]->ptr,"by") && leftargs >= 1) {
             sortby = c->argv[j+1];
             /* If the BY pattern does not contain '*', i.e. it is constant,


@@ -4552,18 +4672,6 @@ static void sortCommand(redisClient *c) {
                 REDIS_SORT_GET,c->argv[j+1]));
             getop++;
             j++;
                 REDIS_SORT_GET,c->argv[j+1]));
             getop++;
             j++;

-        } else if (!strcasecmp(c->argv[j]->ptr,"del") && leftargs >= 1) {
-            listAddNodeTail(operations,createSortOperation(
-                REDIS_SORT_DEL,c->argv[j+1]));
-            j++;
-        } else if (!strcasecmp(c->argv[j]->ptr,"incr") && leftargs >= 1) {
-            listAddNodeTail(operations,createSortOperation(
-                REDIS_SORT_INCR,c->argv[j+1]));
-            j++;
-        } else if (!strcasecmp(c->argv[j]->ptr,"get") && leftargs >= 1) {
-            listAddNodeTail(operations,createSortOperation(
-                REDIS_SORT_DECR,c->argv[j+1]));
-            j++;

         } else {
             decrRefCount(sortval);
             listRelease(operations);
         } else {
             decrRefCount(sortval);
             listRelease(operations);


@@ -4670,32 +4778,72 @@ static void sortCommand(redisClient *c) {
     /* Send command output to the output buffer, performing the specified
      * GET/DEL/INCR/DECR operations if any. */
     outputlen = getop ? getop*(end-start+1) : end-start+1;
     /* Send command output to the output buffer, performing the specified
      * GET/DEL/INCR/DECR operations if any. */
     outputlen = getop ? getop*(end-start+1) : end-start+1;

-    addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",outputlen));
-    for (j = start; j <= end; j++) {
-        listNode *ln;
-        if (!getop) {
-            addReplyBulkLen(c,vector[j].obj);
-            addReply(c,vector[j].obj);
-            addReply(c,shared.crlf);
+    if (storekey == NULL) {
+        /* STORE option not specified, sent the sorting result to client */
+        addReplySds(c,sdscatprintf(sdsempty(),"*%d\r\n",outputlen));
+        for (j = start; j <= end; j++) {
+            listNode *ln;
+            if (!getop) {
+                addReplyBulkLen(c,vector[j].obj);
+                addReply(c,vector[j].obj);
+                addReply(c,shared.crlf);
+            }
+            listRewind(operations);
+            while((ln = listYield(operations))) {
+                redisSortOperation *sop = ln->value;
+                robj *val = lookupKeyByPattern(c->db,sop->pattern,
+                    vector[j].obj);
+
+                if (sop->type == REDIS_SORT_GET) {
+                    if (!val || val->type != REDIS_STRING) {
+                        addReply(c,shared.nullbulk);
+                    } else {
+                        addReplyBulkLen(c,val);
+                        addReply(c,val);
+                        addReply(c,shared.crlf);
+                    }
+                } else {
+                    assert(sop->type == REDIS_SORT_GET); /* always fails */
+                }
+            }

         }
         }

-        listRewind(operations);
-        while((ln = listYield(operations))) {
-            redisSortOperation *sop = ln->value;
-            robj *val = lookupKeyByPattern(c->db,sop->pattern,
-                vector[j].obj);
+    } else {
+        robj *listObject = createListObject();
+        list *listPtr = (list*) listObject->ptr;

 
 

-            if (sop->type == REDIS_SORT_GET) {
-                if (!val || val->type != REDIS_STRING) {
-                    addReply(c,shared.nullbulk);
+        /* STORE option specified, set the sorting result as a List object */
+        for (j = start; j <= end; j++) {
+            listNode *ln;
+            if (!getop) {
+                listAddNodeTail(listPtr,vector[j].obj);
+                incrRefCount(vector[j].obj);
+            }
+            listRewind(operations);
+            while((ln = listYield(operations))) {
+                redisSortOperation *sop = ln->value;
+                robj *val = lookupKeyByPattern(c->db,sop->pattern,
+                    vector[j].obj);
+
+                if (sop->type == REDIS_SORT_GET) {
+                    if (!val || val->type != REDIS_STRING) {
+                        listAddNodeTail(listPtr,createStringObject("",0));
+                    } else {
+                        listAddNodeTail(listPtr,val);
+                        incrRefCount(val);
+                    }

                 } else {
                 } else {

-                    addReplyBulkLen(c,val);
-                    addReply(c,val);
-                    addReply(c,shared.crlf);
+                    assert(sop->type == REDIS_SORT_GET); /* always fails */

                 }
                 }

-            } else if (sop->type == REDIS_SORT_DEL) {
-                /* TODO */

             }
         }
             }
         }

+        if (dictReplace(c->db->dict,storekey,listObject)) {
+            incrRefCount(storekey);
+        }
+        /* Note: we add 1 because the DB is dirty anyway since even if the
+         * SORT result is empty a new key is set and maybe the old content
+         * replaced. */
+        server.dirty += 1+outputlen;
+        addReplySds(c,sdscatprintf(sdsempty(),":%d\r\n",outputlen));

     }
 
     /* Cleanup */
     }
 
     /* Cleanup */


@@ -5158,7 +5306,7 @@ static void updateSlavesWaitingBgsave(int bgsaveerr) {
 }
 
 static int syncWithMaster(void) {
 }
 
 static int syncWithMaster(void) {

-    char buf[1024], tmpfile[256];
+    char buf[1024], tmpfile[256], authcmd[1024];

     int dumpsize;
     int fd = anetTcpConnect(NULL,server.masterhost,server.masterport);
     int dfd;
     int dumpsize;
     int fd = anetTcpConnect(NULL,server.masterhost,server.masterport);
     int dfd;


@@ -5168,6 +5316,30 @@ static int syncWithMaster(void) {
             strerror(errno));
         return REDIS_ERR;
     }
             strerror(errno));
         return REDIS_ERR;
     }

+
+    /* AUTH with the master if required. */
+    if(server.masterauth) {
+       snprintf(authcmd, 1024, "AUTH %s\r\n", server.masterauth);
+       if (syncWrite(fd, authcmd, strlen(server.masterauth)+7, 5) == -1) {
+            close(fd);
+            redisLog(REDIS_WARNING,"Unable to AUTH to MASTER: %s",
+                strerror(errno));
+            return REDIS_ERR;
+       }
+        /* Read the AUTH result.  */
+        if (syncReadLine(fd,buf,1024,3600) == -1) {
+            close(fd);
+            redisLog(REDIS_WARNING,"I/O error reading auth result from MASTER: %s",
+                strerror(errno));
+            return REDIS_ERR;
+        }
+        if (buf[0] != '+') {
+            close(fd);
+            redisLog(REDIS_WARNING,"Cannot AUTH to MASTER, is the masterauth password correct?");
+            return REDIS_ERR;
+        }
+    }
+

     /* Issue the SYNC command */
     if (syncWrite(fd,"SYNC \r\n",7,5) == -1) {
         close(fd);
     /* Issue the SYNC command */
     if (syncWrite(fd,"SYNC \r\n",7,5) == -1) {
         close(fd);


@@ -5310,6 +5482,198 @@ static void freeMemoryIfNeeded(void) {
     }
 }
 
     }
 }
 

+/* ============================== Append Only file ========================== */
+
+static void feedAppendOnlyFile(struct redisCommand *cmd, int dictid, robj **argv, int argc) {
+    sds buf = sdsempty();
+    int j;
+    ssize_t nwritten;
+    time_t now;
+    robj *tmpargv[3];
+
+    /* The DB this command was targetting is not the same as the last command
+     * we appendend. To issue a SELECT command is needed. */
+    if (dictid != server.appendseldb) {
+        char seldb[64];
+
+        snprintf(seldb,sizeof(seldb),"%d",dictid);
+        buf = sdscatprintf(buf,"*2\r\n$6\r\nSELECT\r\n$%d\r\n%s\r\n",
+            strlen(seldb),seldb);
+        server.appendseldb = dictid;
+    }
+
+    /* "Fix" the argv vector if the command is EXPIRE. We want to translate
+     * EXPIREs into EXPIREATs calls */
+    if (cmd->proc == expireCommand) {
+        long when;
+
+        tmpargv[0] = createStringObject("EXPIREAT",8);
+        tmpargv[1] = argv[1];
+        incrRefCount(argv[1]);
+        when = time(NULL)+strtol(argv[2]->ptr,NULL,10);
+        tmpargv[2] = createObject(REDIS_STRING,
+            sdscatprintf(sdsempty(),"%ld",when));
+        argv = tmpargv;
+    }
+
+    /* Append the actual command */
+    buf = sdscatprintf(buf,"*%d\r\n",argc);
+    for (j = 0; j < argc; j++) {
+        robj *o = argv[j];
+
+        if (o->encoding != REDIS_ENCODING_RAW)
+            o = getDecodedObject(o);
+        buf = sdscatprintf(buf,"$%d\r\n",sdslen(o->ptr));
+        buf = sdscatlen(buf,o->ptr,sdslen(o->ptr));
+        buf = sdscatlen(buf,"\r\n",2);
+        if (o != argv[j])
+            decrRefCount(o);
+    }
+
+    /* Free the objects from the modified argv for EXPIREAT */
+    if (cmd->proc == expireCommand) {
+        for (j = 0; j < 3; j++)
+            decrRefCount(argv[j]);
+    }
+
+    /* We want to perform a single write. This should be guaranteed atomic
+     * at least if the filesystem we are writing is a real physical one.
+     * While this will save us against the server being killed I don't think
+     * there is much to do about the whole server stopping for power problems
+     * or alike */
+     nwritten = write(server.appendfd,buf,sdslen(buf));
+     if (nwritten != (signed)sdslen(buf)) {
+        /* Ooops, we are in troubles. The best thing to do for now is
+         * to simply exit instead to give the illusion that everything is
+         * working as expected. */
+         if (nwritten == -1) {
+            redisLog(REDIS_WARNING,"Exiting on error writing to the append-only file: %s",strerror(errno));
+         } else {
+            redisLog(REDIS_WARNING,"Exiting on short write while writing to the append-only file: %s",strerror(errno));
+         }
+         exit(1);
+    }
+    now = time(NULL);
+    if (server.appendfsync == APPENDFSYNC_ALWAYS ||
+        (server.appendfsync == APPENDFSYNC_EVERYSEC &&
+         now-server.lastfsync > 1))
+    {
+        fsync(server.appendfd); /* Let's try to get this data on the disk */
+        server.lastfsync = now;
+    }
+}
+
+/* In Redis commands are always executed in the context of a client, so in
+ * order to load the append only file we need to create a fake client. */
+static struct redisClient *createFakeClient(void) {
+    struct redisClient *c = zmalloc(sizeof(*c));
+
+    selectDb(c,0);
+    c->fd = -1;
+    c->querybuf = sdsempty();
+    c->argc = 0;
+    c->argv = NULL;
+    c->flags = 0;
+    /* We set the fake client as a slave waiting for the synchronization
+     * so that Redis will not try to send replies to this client. */
+    c->replstate = REDIS_REPL_WAIT_BGSAVE_START;
+    c->reply = listCreate();
+    listSetFreeMethod(c->reply,decrRefCount);
+    listSetDupMethod(c->reply,dupClientReplyValue);
+    return c;
+}
+
+static void freeFakeClient(struct redisClient *c) {
+    sdsfree(c->querybuf);
+    listRelease(c->reply);
+    zfree(c);
+}
+
+/* Replay the append log file. On error REDIS_OK is returned. On non fatal
+ * error (the append only file is zero-length) REDIS_ERR is returned. On
+ * fatal error an error message is logged and the program exists. */
+int loadAppendOnlyFile(char *filename) {
+    struct redisClient *fakeClient;
+    FILE *fp = fopen(filename,"r");
+    struct redis_stat sb;
+
+    if (redis_fstat(fileno(fp),&sb) != -1 && sb.st_size == 0)
+        return REDIS_ERR;
+
+    if (fp == NULL) {
+        redisLog(REDIS_WARNING,"Fatal error: can't open the append log file for reading: %s",strerror(errno));
+        exit(1);
+    }
+
+    fakeClient = createFakeClient();
+    while(1) {
+        int argc, j;
+        unsigned long len;
+        robj **argv;
+        char buf[128];
+        sds argsds;
+        struct redisCommand *cmd;
+
+        if (fgets(buf,sizeof(buf),fp) == NULL) {
+            if (feof(fp))
+                break;
+            else
+                goto readerr;
+        }
+        if (buf[0] != '*') goto fmterr;
+        argc = atoi(buf+1);
+        argv = zmalloc(sizeof(robj*)*argc);
+        for (j = 0; j < argc; j++) {
+            if (fgets(buf,sizeof(buf),fp) == NULL) goto readerr;
+            if (buf[0] != '$') goto fmterr;
+            len = strtol(buf+1,NULL,10);
+            argsds = sdsnewlen(NULL,len);
+            if (fread(argsds,len,1,fp) == 0) goto fmterr;
+            argv[j] = createObject(REDIS_STRING,argsds);
+            if (fread(buf,2,1,fp) == 0) goto fmterr; /* discard CRLF */
+        }
+
+        /* Command lookup */
+        cmd = lookupCommand(argv[0]->ptr);
+        if (!cmd) {
+            redisLog(REDIS_WARNING,"Unknown command '%s' reading the append only file", argv[0]->ptr);
+            exit(1);
+        }
+        /* Try object sharing and encoding */
+        if (server.shareobjects) {
+            int j;
+            for(j = 1; j < argc; j++)
+                argv[j] = tryObjectSharing(argv[j]);
+        }
+        if (cmd->flags & REDIS_CMD_BULK)
+            tryObjectEncoding(argv[argc-1]);
+        /* Run the command in the context of a fake client */
+        fakeClient->argc = argc;
+        fakeClient->argv = argv;
+        cmd->proc(fakeClient);
+        /* Discard the reply objects list from the fake client */
+        while(listLength(fakeClient->reply))
+            listDelNode(fakeClient->reply,listFirst(fakeClient->reply));
+        /* Clean up, ready for the next command */
+        for (j = 0; j < argc; j++) decrRefCount(argv[j]);
+        zfree(argv);
+    }
+    fclose(fp);
+    freeFakeClient(fakeClient);
+    return REDIS_OK;
+
+readerr:
+    if (feof(fp)) {
+        redisLog(REDIS_WARNING,"Unexpected end of file reading the append only file");
+    } else {
+        redisLog(REDIS_WARNING,"Unrecoverable error reading the append only file: %s", strerror(errno));
+    }
+    exit(1);
+fmterr:
+    redisLog(REDIS_WARNING,"Bad file format reading the append only file");
+    exit(1);
+}
+

 /* ================================= Debugging ============================== */
 
 static void debugCommand(redisClient *c) {
 /* ================================= Debugging ============================== */
 
 static void debugCommand(redisClient *c) {


@@ -5334,148 +5698,90 @@ static void debugCommand(redisClient *c) {
     }
 }
 
     }
 }
 

-#ifdef HAVE_BACKTRACE
-static struct redisFunctionSym symsTable[] = {
-{"compareStringObjects", (unsigned long)compareStringObjects},
-{"isStringRepresentableAsLong", (unsigned long)isStringRepresentableAsLong},
-{"dictEncObjKeyCompare", (unsigned long)dictEncObjKeyCompare},
-{"dictEncObjHash", (unsigned long)dictEncObjHash},
-{"incrDecrCommand", (unsigned long)incrDecrCommand},
-{"freeStringObject", (unsigned long)freeStringObject},
-{"freeListObject", (unsigned long)freeListObject},
-{"freeSetObject", (unsigned long)freeSetObject},
-{"decrRefCount", (unsigned long)decrRefCount},
-{"createObject", (unsigned long)createObject},
-{"freeClient", (unsigned long)freeClient},
-{"rdbLoad", (unsigned long)rdbLoad},
-{"rdbSaveStringObject", (unsigned long)rdbSaveStringObject},
-{"rdbSaveStringObjectRaw", (unsigned long)rdbSaveStringObjectRaw},
-{"addReply", (unsigned long)addReply},
-{"addReplySds", (unsigned long)addReplySds},
-{"incrRefCount", (unsigned long)incrRefCount},
-{"rdbSaveBackground", (unsigned long)rdbSaveBackground},
-{"createStringObject", (unsigned long)createStringObject},
-{"replicationFeedSlaves", (unsigned long)replicationFeedSlaves},
-{"syncWithMaster", (unsigned long)syncWithMaster},
-{"tryObjectSharing", (unsigned long)tryObjectSharing},
-{"tryObjectEncoding", (unsigned long)tryObjectEncoding},
-{"getDecodedObject", (unsigned long)getDecodedObject},
-{"removeExpire", (unsigned long)removeExpire},
-{"expireIfNeeded", (unsigned long)expireIfNeeded},
-{"deleteIfVolatile", (unsigned long)deleteIfVolatile},
-{"deleteKey", (unsigned long)deleteKey},
-{"getExpire", (unsigned long)getExpire},
-{"setExpire", (unsigned long)setExpire},
-{"updateSlavesWaitingBgsave", (unsigned long)updateSlavesWaitingBgsave},
-{"freeMemoryIfNeeded", (unsigned long)freeMemoryIfNeeded},
-{"authCommand", (unsigned long)authCommand},
-{"pingCommand", (unsigned long)pingCommand},
-{"echoCommand", (unsigned long)echoCommand},
-{"setCommand", (unsigned long)setCommand},
-{"setnxCommand", (unsigned long)setnxCommand},
-{"getCommand", (unsigned long)getCommand},
-{"delCommand", (unsigned long)delCommand},
-{"existsCommand", (unsigned long)existsCommand},
-{"incrCommand", (unsigned long)incrCommand},
-{"decrCommand", (unsigned long)decrCommand},
-{"incrbyCommand", (unsigned long)incrbyCommand},
-{"decrbyCommand", (unsigned long)decrbyCommand},
-{"selectCommand", (unsigned long)selectCommand},
-{"randomkeyCommand", (unsigned long)randomkeyCommand},
-{"keysCommand", (unsigned long)keysCommand},
-{"dbsizeCommand", (unsigned long)dbsizeCommand},
-{"lastsaveCommand", (unsigned long)lastsaveCommand},
-{"saveCommand", (unsigned long)saveCommand},
-{"bgsaveCommand", (unsigned long)bgsaveCommand},
-{"shutdownCommand", (unsigned long)shutdownCommand},
-{"moveCommand", (unsigned long)moveCommand},
-{"renameCommand", (unsigned long)renameCommand},
-{"renamenxCommand", (unsigned long)renamenxCommand},
-{"lpushCommand", (unsigned long)lpushCommand},
-{"rpushCommand", (unsigned long)rpushCommand},
-{"lpopCommand", (unsigned long)lpopCommand},
-{"rpopCommand", (unsigned long)rpopCommand},
-{"llenCommand", (unsigned long)llenCommand},
-{"lindexCommand", (unsigned long)lindexCommand},
-{"lrangeCommand", (unsigned long)lrangeCommand},
-{"ltrimCommand", (unsigned long)ltrimCommand},
-{"typeCommand", (unsigned long)typeCommand},
-{"lsetCommand", (unsigned long)lsetCommand},
-{"saddCommand", (unsigned long)saddCommand},
-{"sremCommand", (unsigned long)sremCommand},
-{"smoveCommand", (unsigned long)smoveCommand},
-{"sismemberCommand", (unsigned long)sismemberCommand},
-{"scardCommand", (unsigned long)scardCommand},
-{"spopCommand", (unsigned long)spopCommand},
-{"srandmemberCommand", (unsigned long)srandmemberCommand},
-{"sinterCommand", (unsigned long)sinterCommand},
-{"sinterstoreCommand", (unsigned long)sinterstoreCommand},
-{"sunionCommand", (unsigned long)sunionCommand},
-{"sunionstoreCommand", (unsigned long)sunionstoreCommand},
-{"sdiffCommand", (unsigned long)sdiffCommand},
-{"sdiffstoreCommand", (unsigned long)sdiffstoreCommand},
-{"syncCommand", (unsigned long)syncCommand},
-{"flushdbCommand", (unsigned long)flushdbCommand},
-{"flushallCommand", (unsigned long)flushallCommand},
-{"sortCommand", (unsigned long)sortCommand},
-{"lremCommand", (unsigned long)lremCommand},
-{"infoCommand", (unsigned long)infoCommand},
-{"mgetCommand", (unsigned long)mgetCommand},
-{"monitorCommand", (unsigned long)monitorCommand},
-{"expireCommand", (unsigned long)expireCommand},
-{"expireatCommand", (unsigned long)expireatCommand},
-{"getsetCommand", (unsigned long)getsetCommand},
-{"ttlCommand", (unsigned long)ttlCommand},
-{"slaveofCommand", (unsigned long)slaveofCommand},
-{"debugCommand", (unsigned long)debugCommand},
-{"processCommand", (unsigned long)processCommand},
-{"setupSigSegvAction", (unsigned long)setupSigSegvAction},
-{"readQueryFromClient", (unsigned long)readQueryFromClient},
-{"rdbRemoveTempFile", (unsigned long)rdbRemoveTempFile},
-{"msetGenericCommand", (unsigned long)msetGenericCommand},
-{"msetCommand", (unsigned long)msetCommand},
-{"msetnxCommand", (unsigned long)msetnxCommand},
-{"zslCreateNode", (unsigned long)zslCreateNode},
-{"zslCreate", (unsigned long)zslCreate},
-{"zslFreeNode",(unsigned long)zslFreeNode},
-{"zslFree",(unsigned long)zslFree},
-{"zslRandomLevel",(unsigned long)zslRandomLevel},
-{"zslInsert",(unsigned long)zslInsert},
-{"zslDelete",(unsigned long)zslDelete},
-{"createZsetObject",(unsigned long)createZsetObject},
-{"zaddCommand",(unsigned long)zaddCommand},
-{"zrangeGenericCommand",(unsigned long)zrangeGenericCommand},
-{"zrangeCommand",(unsigned long)zrangeCommand},
-{"zrevrangeCommand",(unsigned long)zrevrangeCommand},
-{"zremCommand",(unsigned long)zremCommand},
-{"rdbSaveDoubleValue",(unsigned long)rdbSaveDoubleValue},
-{"rdbLoadDoubleValue",(unsigned long)rdbLoadDoubleValue},
-{NULL,0}
-};
+/* =================================== Main! ================================ */

 
 

-/* This function try to convert a pointer into a function name. It's used in
- * oreder to provide a backtrace under segmentation fault that's able to
- * display functions declared as static (otherwise the backtrace is useless). */
-static char *findFuncName(void *pointer, unsigned long *offset){
-    int i, ret = -1;
-    unsigned long off, minoff = 0;
+#ifdef __linux__
+int linuxOvercommitMemoryValue(void) {
+    FILE *fp = fopen("/proc/sys/vm/overcommit_memory","r");
+    char buf[64];

 
 

-    /* Try to match against the Symbol with the smallest offset */
-    for (i=0; symsTable[i].pointer; i++) {
-        unsigned long lp = (unsigned long) pointer;
+    if (!fp) return -1;
+    if (fgets(buf,64,fp) == NULL) {
+        fclose(fp);
+        return -1;
+    }
+    fclose(fp);

 
 

-        if (lp != (unsigned long)-1 && lp >= symsTable[i].pointer) {
-            off=lp-symsTable[i].pointer;
-            if (ret < 0 || off < minoff) {
-                minoff=off;
-                ret=i;
-            }
-        }
+    return atoi(buf);
+}
+
+void linuxOvercommitMemoryWarning(void) {
+    if (linuxOvercommitMemoryValue() == 0) {
+        redisLog(REDIS_WARNING,"WARNING overcommit_memory is set to 0! Background save may fail under low condition memory. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.");

     }
     }

-    if (ret == -1) return NULL;
-    *offset = minoff;
-    return symsTable[ret].name;

 }
 }

+#endif /* __linux__ */
+
+static void daemonize(void) {
+    int fd;
+    FILE *fp;
+
+    if (fork() != 0) exit(0); /* parent exits */
+    setsid(); /* create a new session */
+
+    /* Every output goes to /dev/null. If Redis is daemonized but
+     * the 'logfile' is set to 'stdout' in the configuration file
+     * it will not log at all. */
+    if ((fd = open("/dev/null", O_RDWR, 0)) != -1) {
+        dup2(fd, STDIN_FILENO);
+        dup2(fd, STDOUT_FILENO);
+        dup2(fd, STDERR_FILENO);
+        if (fd > STDERR_FILENO) close(fd);
+    }
+    /* Try to write the pid file */
+    fp = fopen(server.pidfile,"w");
+    if (fp) {
+        fprintf(fp,"%d\n",getpid());
+        fclose(fp);
+    }
+}
+
+int main(int argc, char **argv) {
+    initServerConfig();
+    if (argc == 2) {
+        resetServerSaveParams();
+        loadServerConfig(argv[1]);
+    } else if (argc > 2) {
+        fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf]\n");
+        exit(1);
+    } else {
+        redisLog(REDIS_WARNING,"Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'");
+    }
+    initServer();
+    if (server.daemonize) daemonize();
+    redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
+#ifdef __linux__
+    linuxOvercommitMemoryWarning();
+#endif
+    if (server.appendonly) {
+        if (loadAppendOnlyFile(server.appendfilename) == REDIS_OK)
+            redisLog(REDIS_NOTICE,"DB loaded from append only file");
+    } else {
+        if (rdbLoad(server.dbfilename) == REDIS_OK)
+            redisLog(REDIS_NOTICE,"DB loaded from disk");
+    }
+    if (aeCreateFileEvent(server.el, server.fd, AE_READABLE,
+        acceptHandler, NULL, NULL) == AE_ERR) oom("creating file event");
+    redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
+    aeMain(server.el);
+    aeDeleteEventLoop(server.el);
+    return 0;
+}
+
+/* ============================= Backtrace support ========================= */
+
+#ifdef HAVE_BACKTRACE
+static char *findFuncName(void *pointer, unsigned long *offset);

 
 static void *getMcontextEip(ucontext_t *uc) {
 #if defined(__FreeBSD__)
 
 static void *getMcontextEip(ucontext_t *uc) {
 #if defined(__FreeBSD__)


@@ -5571,82 +5877,39 @@ static void setupSigSegvAction(void) {
     sigaction (SIGBUS, &act, NULL);
     return;
 }
     sigaction (SIGBUS, &act, NULL);
     return;
 }

-#else /* HAVE_BACKTRACE */
-static void setupSigSegvAction(void) {
-}
-#endif /* HAVE_BACKTRACE */

 
 

-/* =================================== Main! ================================ */
+#include "staticsymbols.h"
+/* This function try to convert a pointer into a function name. It's used in
+ * oreder to provide a backtrace under segmentation fault that's able to
+ * display functions declared as static (otherwise the backtrace is useless). */
+static char *findFuncName(void *pointer, unsigned long *offset){
+    int i, ret = -1;
+    unsigned long off, minoff = 0;

 
 

-#ifdef __linux__
-int linuxOvercommitMemoryValue(void) {
-    FILE *fp = fopen("/proc/sys/vm/overcommit_memory","r");
-    char buf[64];
+    /* Try to match against the Symbol with the smallest offset */
+    for (i=0; symsTable[i].pointer; i++) {
+        unsigned long lp = (unsigned long) pointer;

 
 

-    if (!fp) return -1;
-    if (fgets(buf,64,fp) == NULL) {
-        fclose(fp);
-        return -1;
+        if (lp != (unsigned long)-1 && lp >= symsTable[i].pointer) {
+            off=lp-symsTable[i].pointer;
+            if (ret < 0 || off < minoff) {
+                minoff=off;
+                ret=i;
+            }
+        }

     }
     }

-    fclose(fp);
-
-    return atoi(buf);
+    if (ret == -1) return NULL;
+    *offset = minoff;
+    return symsTable[ret].name;

 }
 }

-
-void linuxOvercommitMemoryWarning(void) {
-    if (linuxOvercommitMemoryValue() == 0) {
-        redisLog(REDIS_WARNING,"WARNING overcommit_memory is set to 0! Background save may fail under low condition memory. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.");
-    }
+#else /* HAVE_BACKTRACE */
+static void setupSigSegvAction(void) {

 }
 }

-#endif /* __linux__ */
+#endif /* HAVE_BACKTRACE */

 
 

-static void daemonize(void) {
-    int fd;
-    FILE *fp;

 
 

-    if (fork() != 0) exit(0); /* parent exits */
-    setsid(); /* create a new session */

 
 

-    /* Every output goes to /dev/null. If Redis is daemonized but
-     * the 'logfile' is set to 'stdout' in the configuration file
-     * it will not log at all. */
-    if ((fd = open("/dev/null", O_RDWR, 0)) != -1) {
-        dup2(fd, STDIN_FILENO);
-        dup2(fd, STDOUT_FILENO);
-        dup2(fd, STDERR_FILENO);
-        if (fd > STDERR_FILENO) close(fd);
-    }
-    /* Try to write the pid file */
-    fp = fopen(server.pidfile,"w");
-    if (fp) {
-        fprintf(fp,"%d\n",getpid());
-        fclose(fp);
-    }
-}
+/* The End */
+
+

 
 

-int main(int argc, char **argv) {
-    initServerConfig();
-    if (argc == 2) {
-        ResetServerSaveParams();
-        loadServerConfig(argv[1]);
-    } else if (argc > 2) {
-        fprintf(stderr,"Usage: ./redis-server [/path/to/redis.conf]\n");
-        exit(1);
-    } else {
-        redisLog(REDIS_WARNING,"Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'");
-    }
-    initServer();
-    if (server.daemonize) daemonize();
-    redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
-#ifdef __linux__
-    linuxOvercommitMemoryWarning();
-#endif
-    if (rdbLoad(server.dbfilename) == REDIS_OK)
-        redisLog(REDIS_NOTICE,"DB loaded from disk");
-    if (aeCreateFileEvent(server.el, server.fd, AE_READABLE,
-        acceptHandler, NULL, NULL) == AE_ERR) oom("creating file event");
-    redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
-    aeMain(server.el);
-    aeDeleteEventLoop(server.el);
-    return 0;
-}