- 22 Nov, 2012 3 commits
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antirez authored
EVALSHA used to crash if the SHA1 was not lowercase (Issue #783). Fixed using a case insensitive dictionary type for the sha -> script map used for replication of scripts.
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antirez authored
This fixes issue #761.
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antirez authored
After the transcation starts with a MULIT, the previous behavior was to return an error on problems such as maxmemory limit reached. But still to execute the transaction with the subset of queued commands on EXEC. While it is true that the client was able to check for errors distinguish QUEUED by an error reply, MULTI/EXEC in most client implementations uses pipelining for speed, so all the commands and EXEC are sent without caring about replies. With this change: 1) EXEC fails if at least one command was not queued because of an error. The EXECABORT error is used. 2) A generic error is always reported on EXEC. 3) The client DISCARDs the MULTI state after a failed EXEC, otherwise pipelining multiple transactions would be basically impossible: After a failed EXEC the next transaction would be simply queued as the tail of the previous transaction.
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- 20 Nov, 2012 2 commits
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antirez authored
Finally Redis is able to report the amount of memory used by copy-on-write while saving an RDB or writing an AOF file in background. Note that this information is currently only logged (at NOTICE level) and not shown in INFO because this is less trivial (but surely doable with some minor form of interprocess communication). The reason we can't capture this information on the parent before we call wait3() is that the Linux kernel will release the child memory ASAP, and only retain the minimal state for the process that is useful to report the child termination to the parent. The COW size is obtained by summing all the Private_Dirty fields found in the "smap" file inside the proc filesystem for the process. All this is Linux specific and is not available on other systems.
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antirez authored
For non Linux systmes it just returns 0. This function is useful to estimate copy-on-write because of childs saving stuff on disk.
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- 14 Nov, 2012 1 commit
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antirez authored
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- 12 Nov, 2012 3 commits
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antirez authored
When a timeout <= 0 is provided we set a default timeout of 1 second. It was set to 1 millisecond for an error resulting from a recent change.
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antirez authored
While it is documented that the MIGRATE timeout is in milliseconds, it was in seconds instead. This commit fixes the problem.
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antirez authored
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- 08 Nov, 2012 2 commits
- 06 Nov, 2012 1 commit
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antirez authored
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- 02 Nov, 2012 1 commit
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Runzhen Wang authored
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- 01 Nov, 2012 3 commits
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antirez authored
After the wait3() syscall we used to do something like that: if (pid == server.rdb_child_pid) { backgroundSaveDoneHandler(exitcode,bysignal); } else { .... } So the AOF rewrite was handled in the else branch without actually checking if the pid really matches. This commit makes the check explicit and logs at WARNING level if the pid returned by wait3() does not match neither the RDB or AOF rewrite child.
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antirez authored
This also fixes issue #745.
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Yecheng Fu authored
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- 31 Oct, 2012 1 commit
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antirez authored
Because of the short circuit behavior of && inverting the two sides of the if expression avoids an hash table lookup if the non-EX variant of SET is called. Thanks to Weibin Yao (@yaoweibin on github) for spotting this.
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- 30 Oct, 2012 2 commits
- 26 Oct, 2012 3 commits
- 25 Oct, 2012 2 commits
- 24 Oct, 2012 1 commit
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antirez authored
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- 22 Oct, 2012 6 commits
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antirez authored
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antirez authored
This was an important information missing from the INFO output in the replication section. It obviously reflects if the slave is read only or not.
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Greg Hurrell authored
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Schuster authored
(Commit message from @antirez as it was missign in the original commits, also the patch was modified a bit to still work with 2.4 dumps and to avoid if expressions that are always true due to checked types range) This commit changes redis-check-dump to account for new encodings and for the new MSTIME expire format. It also refactors the test for valid type into a function. The code is still compatible with Redis 2.4 generated dumps. This fixes issue #709.
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antirez authored
In some system, notably osx, the 3.5 GB limit was too far and not able to prevent a crash for out of memory. The 3 GB limit works better and it is still a lot of memory within a 4 GB theorical limit so it's not going to bore anyone :-) This fixes issue #711
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antirez authored
When calling SCRIPT KILL currently you can get two errors: * No script in timeout (busy) state. * The script already performed a write. It is useful to be able to distinguish the two errors, but right now both start with "ERR" prefix, so string matching (that is fragile) must be used. This commit introduces two different prefixes. -NOTBUSY and -UNKILLABLE respectively to reply with an error when no script is busy at the moment, and when the script already executed a write operation and can not be killed.
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- 18 Oct, 2012 1 commit
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NanXiao authored
The code of current implementation: if (c->pending == 0) clientDone(c); In clientDone function, the c's memory has been freed, then the loop will continue: while(c->pending). The memory of c has been freed now, so c->pending is invalid (c is an invalid pointer now), and this will cause memory dump in some platforams(eg: Solaris). So I think the code should be modified as: if (c->pending == 0) { clientDone(c); break; } and this will not lead to while(c->pending).
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- 16 Oct, 2012 1 commit
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antirez authored
Before of this commit it used to be like this: MULTI EXEC ... actual commands of the transaction ... Because after all that is the natural order of things. Transaction commands are queued and executed *only after* EXEC is called. However this makes debugging with MONITOR a mess, so the code was modified to provide a coherent output. What happens is that MULTI is rendered in the MONITOR output as far as possible, instead EXEC is propagated only after the transaction is executed, or even in the case it fails because of WATCH, so in this case you'll simply see: MULTI EXEC An empty transaction.
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- 11 Oct, 2012 1 commit
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antirez authored
If the server is password protected we need to accept AUTH when there is a server busy (-BUSY) condition, otherwise it will be impossible to send SHUTDOWN NOSAVE or SCRIPT KILL. This fixes issue #708.
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- 05 Oct, 2012 4 commits
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antirez authored
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antirez authored
The previously used hash function, djbhash, is not secure against collision attacks even when the seed is randomized as there are simple ways to find seed-independent collisions. The new hash function appears to be safe (or much harder to exploit at least) in this case, and has better distribution. Better distribution does not always means that's better. For instance in a fast benchmark with "DEBUG POPULATE 1000000" I obtained the following results: 1.6 seconds with djbhash 2.0 seconds with murmurhash2 This is due to the fact that djbhash will hash objects that follow the pattern `prefix:<id>` and where the id is numerically near, to near buckets. This improves the locality. However in other access patterns with keys that have no relation murmurhash2 has some (apparently minimal) speed advantage. On the other hand a better distribution should significantly improve the quality of the distribution of elements returned with dictGetRandomKey() that is used in SPOP, SRANDMEMBER, RANDOMKEY, and other commands. Everything considered, and under the suspect that this commit fixes a security issue in Redis, we are switching to the new hash function. If some serious speed regression will be found in the future we'll be able to step back easiliy. This commit fixes issue #663.
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antirez authored
This commit warns the user with a log at "warning" level if: 1) After the server startup the maxmemory limit was found to be < 1MB. 2) After a CONFIG SET command modifying the maxmemory setting the limit is set to a value that is smaller than the currently used memory. The behaviour of the Redis server is unmodified, and this wil not make the CONFIG SET command or a wrong configuration in redis.conf less likely to create problems, but at least this will make aware most users about a possbile error they committed without resorting to external help. However no warning is issued if, as a result of loading the AOF or RDB file, we are very near the maxmemory setting, or key eviction will be needed in order to go under the specified maxmemory setting. The reason is that in servers configured as a cache with an aggressive maxmemory-policy most of the times restarting the server will cause this condition to happen if persistence is not switched off. This fixes issue #429.
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antirez authored
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- 04 Oct, 2012 2 commits
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Jokea authored
When system time changes back, the timer will not worker properly hence some core functionality of redis will stop working(e.g. replication, bgsave, etc). See issue #633 for details. The patch saves the previous time and when a system clock skew is detected, it will force expire all timers. Modiifed by @antirez: the previous time was moved into the eventLoop structure to make sure the library is still thread safe as long as you use different event loops into different threads (otherwise you need some synchronization). More comments added about the reasoning at the base of the patch, that's worth reporting here: /* If the system clock is moved to the future, and then set back to the * right value, time events may be delayed in a random way. Often this * means that scheduled operations will not be performed soon enough. * * Here we try to detect system clock skews, and force all the time * events to be processed ASAP when this happens: the idea is that * processing events earlier is less dangerous than delaying them * indefinitely, and practice suggests it is. */
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antirez authored
The new message now contains an hint about modifying the repl-timeout configuration directive if the problem persists. This should normally not be needed, because while the master generates the RDB file it makes sure to send newlines to the replication channel to prevent timeouts. However there are times when masters running on very slow systems can completely stop for seconds during the RDB saving process. In such a case enlarging the timeout value can fix the problem. See issue #695 for an example of this problem in an EC2 deployment.
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