Further integrate MDB key archival into config.

[redis.git] / src / redis.c

diff --git a/src/redis.c b/src/redis.c
index 463dc2aacba5420c0ad19807269e11c629cacf36..eed212635dc3882626fe76043f64f54c92fdd02e 100644 (file)
--- a/src/redis.c
+++ b/src/redis.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2009-2012, Salvatore Sanfilippo <antirez at gmail dot com>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -49,6 +49,7 @@
 #include <math.h>
 #include <sys/resource.h>
 #include <sys/utsname.h>
+#include <lmdb.h>
 
 /* Our shared "common" objects */
 
@@ -391,7 +392,8 @@ int dictSdsKeyCompare(void *privdata, const void *key1,
     return memcmp(key1, key2, l1) == 0;
 }
 
-/* A case insensitive version used for the command lookup table. */
+/* A case insensitive version used for the command lookup table and other
+ * places where case insensitive non binary-safe comparison is needed. */
 int dictSdsKeyCaseCompare(void *privdata, const void *key1,
         const void *key2)
 {
@@ -506,6 +508,16 @@ dictType dbDictType = {
     dictRedisObjectDestructor   /* val destructor */
 };
 
+/* server.lua_scripts sha (as sds string) -> scripts (as robj) cache. */
+dictType shaScriptObjectDictType = {
+    dictSdsCaseHash,            /* hash function */
+    NULL,                       /* key dup */
+    NULL,                       /* val dup */
+    dictSdsKeyCaseCompare,      /* key compare */
+    dictSdsDestructor,          /* key destructor */
+    dictRedisObjectDestructor   /* val destructor */
+};
+
 /* Db->expires */
 dictType keyptrDictType = {
     dictSdsHash,               /* hash function */
@@ -902,8 +914,12 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
 
             if (pid == server.rdb_child_pid) {
                 backgroundSaveDoneHandler(exitcode,bysignal);
-            } else {
+            } else if (pid == server.aof_child_pid) {
                 backgroundRewriteDoneHandler(exitcode,bysignal);
+            } else {
+                redisLog(REDIS_WARNING,
+                    "Warning, detected child with unmatched pid: %ld",
+                    (long)pid);
             }
             updateDictResizePolicy();
         }
@@ -1033,6 +1049,8 @@ void createSharedObjects(void) {
         "-READONLY You can't write against a read only slave.\r\n"));
     shared.oomerr = createObject(REDIS_STRING,sdsnew(
         "-OOM command not allowed when used memory > 'maxmemory'.\r\n"));
+    shared.execaborterr = createObject(REDIS_STRING,sdsnew(
+        "-EXECABORT Transaction discarded because of previous errors.\r\n"));
     shared.space = createObject(REDIS_STRING,sdsnew(" "));
     shared.colon = createObject(REDIS_STRING,sdsnew(":"));
     shared.plus = createObject(REDIS_STRING,sdsnew("+"));
@@ -1102,6 +1120,9 @@ void initServerConfig() {
     server.pidfile = zstrdup("/var/run/redis.pid");
     server.rdb_filename = zstrdup("dump.rdb");
     server.aof_filename = zstrdup("appendonly.aof");
+    server.mdb_state = REDIS_MDB_OFF;
+    server.mdb_environment = zstrdup("archive");
+    server.mdb_mapsize = 10485760;
     server.requirepass = NULL;
     server.rdb_compression = 1;
     server.rdb_checksum = 1;
@@ -1327,6 +1348,15 @@ void initServer() {
         }
     }
 
+    if (server.aof_state == REDIS_MDB_ON) {
+        int retval = startKeyArchive();
+        if (retval != 0) {
+            redisLog(REDIS_WARNING, "Can't open the key-archive environment: %s",
+                mdb_strerror(retval));
+            exit(1);
+        }
+    }
+
     /* 32 bit instances are limited to 4GB of address space, so if there is
      * no explicit limit in the user provided configuration we set a limit
      * at 3 GB using maxmemory with 'noeviction' policy'. This avoids
@@ -1527,7 +1557,7 @@ void call(redisClient *c, int flags) {
 }
 
 /* If this function gets called we already read a whole
- * command, argments are in the client argv/argc fields.
+ * command, arguments are in the client argv/argc fields.
  * processCommand() execute the command or prepare the
  * server for a bulk read from the client.
  *
@@ -1549,11 +1579,13 @@ int processCommand(redisClient *c) {
      * such as wrong arity, bad command name and so forth. */
     c->cmd = c->lastcmd = lookupCommand(c->argv[0]->ptr);
     if (!c->cmd) {
+        flagTransaction(c);
         addReplyErrorFormat(c,"unknown command '%s'",
             (char*)c->argv[0]->ptr);
         return REDIS_OK;
     } else if ((c->cmd->arity > 0 && c->cmd->arity != c->argc) ||
                (c->argc < -c->cmd->arity)) {
+        flagTransaction(c);
         addReplyErrorFormat(c,"wrong number of arguments for '%s' command",
             c->cmd->name);
         return REDIS_OK;
@@ -1562,6 +1594,7 @@ int processCommand(redisClient *c) {
     /* Check if the user is authenticated */
     if (server.requirepass && !c->authenticated && c->cmd->proc != authCommand)
     {
+        flagTransaction(c);
         addReplyError(c,"operation not permitted");
         return REDIS_OK;
     }
@@ -1574,6 +1607,7 @@ int processCommand(redisClient *c) {
     if (server.maxmemory) {
         int retval = freeMemoryIfNeeded();
         if ((c->cmd->flags & REDIS_CMD_DENYOOM) && retval == REDIS_ERR) {
+            flagTransaction(c);
             addReply(c, shared.oomerr);
             return REDIS_OK;
         }
@@ -1585,6 +1619,7 @@ int processCommand(redisClient *c) {
         && server.lastbgsave_status == REDIS_ERR &&
         c->cmd->flags & REDIS_CMD_WRITE)
     {
+        flagTransaction(c);
         addReply(c, shared.bgsaveerr);
         return REDIS_OK;
     }
@@ -1616,6 +1651,7 @@ int processCommand(redisClient *c) {
         server.repl_serve_stale_data == 0 &&
         !(c->cmd->flags & REDIS_CMD_STALE))
     {
+        flagTransaction(c);
         addReply(c, shared.masterdownerr);
         return REDIS_OK;
     }
@@ -1637,6 +1673,7 @@ int processCommand(redisClient *c) {
           c->argc == 2 &&
           tolower(((char*)c->argv[1]->ptr)[0]) == 'k'))
     {
+        flagTransaction(c);
         addReply(c, shared.slowscripterr);
         return REDIS_OK;
     }
@@ -2175,7 +2212,7 @@ void infoCommand(redisClient *c) {
 }
 
 void monitorCommand(redisClient *c) {
-    /* ignore MONITOR if aleady slave or in monitor mode */
+    /* ignore MONITOR if already slave or in monitor mode */
     if (c->flags & REDIS_SLAVE) return;
 
     c->flags |= (REDIS_SLAVE|REDIS_MONITOR);
@@ -2274,7 +2311,7 @@ int freeMemoryIfNeeded(void) {
 
                     de = dictGetRandomKey(dict);
                     thiskey = dictGetKey(de);
-                    /* When policy is volatile-lru we need an additonal lookup
+                    /* When policy is volatile-lru we need an additional lookup
                      * to locate the real key, as dict is set to db->expires. */
                     if (server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_LRU)
                         de = dictFind(db->dict, thiskey);
@@ -2313,6 +2350,8 @@ int freeMemoryIfNeeded(void) {
                 long long delta;
 
                 robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
+                int archived = archive(db, keyobj);
+                redisAssert(archived != 0);
                 propagateExpire(db,keyobj);
                 /* We compute the amount of memory freed by dbDelete() alone.
                  * It is possible that actually the memory needed to propagate
@@ -2576,7 +2615,7 @@ int main(int argc, char **argv) {
     redisAsciiArt();
 
     if (!server.sentinel_mode) {
-        /* Things only needed when not runnign in Sentinel mode. */
+        /* Things only needed when not running in Sentinel mode. */
         redisLog(REDIS_WARNING,"Server started, Redis version " REDIS_VERSION);
     #ifdef __linux__
         linuxOvercommitMemoryWarning();