Support EXISTS command queries against MDB archive.

[redis.git] / src / config.c

diff --git a/src/config.c b/src/config.c
index 768db1e9ab9229d8567b52b42d5ee3a3a2651c95..4974d5ee346ed0e4f77a0213b3cc7184a292af21 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -1,3 +1,34 @@
+/* Configuration file parsing and CONFIG GET/SET commands implementation.
+ *
+ * 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
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
 #include "redis.h"
 
 /*-----------------------------------------------------------------------------
@@ -225,6 +256,18 @@ void loadServerConfigFromString(char *config) {
             if ((server.daemonize = yesnotoi(argv[1])) == -1) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
             }
+        } else if (!strcasecmp(argv[0],"keyarchive") && argc == 2) {
+            int yes;
+
+            if ((yes = yesnotoi(argv[1])) == -1) {
+                err = "argument must be 'yes' or 'no'"; goto loaderr;
+            }
+            server.mdb_state = yes ? REDIS_MDB_ON : REDIS_MDB_OFF;
+        } else if (!strcasecmp(argv[0],"mdb-environment") && argc == 2) {
+            zfree(server.mdb_environment);
+            server.mdb_environment = zstrdup(argv[1]);
+        } else if (!strcasecmp(argv[0],"mdb-mapsize") && argc == 2) {
+            server.mdb_mapsize = memtoll(argv[1], NULL);
         } else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
             int yes;
 
@@ -438,7 +481,12 @@ void configSetCommand(redisClient *c) {
         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
             ll < 0) goto badfmt;
         server.maxmemory = ll;
-        if (server.maxmemory) freeMemoryIfNeeded();
+        if (server.maxmemory) {
+            if (server.maxmemory < zmalloc_used_memory()) {
+                redisLog(REDIS_WARNING,"WARNING: the new maxmemory value set via CONFIG SET is smaller than the current memory usage. This will result in keys eviction and/or inability to accept new write commands depending on the maxmemory-policy.");
+            }
+            freeMemoryIfNeeded();
+        }
     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
         if (!strcasecmp(o->ptr,"volatile-lru")) {
             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
@@ -463,6 +511,19 @@ void configSetCommand(redisClient *c) {
         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
             ll < 0 || ll > LONG_MAX) goto badfmt;
         server.maxidletime = ll;
+    } else if (!strcasecmp(c->argv[2]->ptr,"keyarchive")) {
+        int enable = yesnotoi(o->ptr);
+
+        if (enable == -1) goto badfmt;
+        if (enable == 0 && server.mdb_state != REDIS_MDB_OFF) {
+            stopKeyArchive();
+        } else if (enable && server.mdb_state == REDIS_MDB_OFF) {
+            if (startKeyArchive() != 0) {
+                addReplyError(c,
+                    "Unable to turn on MDB. Check server logs.");
+                return;
+            }
+        }
     } else if (!strcasecmp(c->argv[2]->ptr,"appendfsync")) {
         if (!strcasecmp(o->ptr,"no")) {
             server.aof_fsync = AOF_FSYNC_NO;