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203 Commits

Author SHA1 Message Date
antirez
8b90a5ebb2 Cluster: clusterSendFailoverAuthIfNeeded() work in progress. 2013-03-13 19:08:03 +01:00
antirez
3e23f6b2bf Cluster: handle FAILOVER_AUTH_REQUEST in clusterProcessPacket(). 
However currently the control is passed to a function doing nothing at
all.
 2013-03-13 18:38:08 +01:00
antirez
9975fac7bb Cluster: sanity check FAILOVER_AUTH_REQUEST messages for proper length. 2013-03-13 17:31:26 +01:00
antirez
95f0799010 Cluster: use 'else if' for mutually exclusive conditionals. 2013-03-13 17:27:06 +01:00
antirez
444fd457d2 Cluster: FAILOVER_AUTH_REQUEST message type introduced. 
This message is sent by a slave that is ready to failover its master to
other nodes to get the authorization from the majority of masters.
 2013-03-13 17:21:20 +01:00
antirez
80158107bd Cluster: clusterHandleSlaveFailover() stub. 2013-03-13 13:10:49 +01:00
antirez
d1d1f6cad4 Cluster: call clusterHandleSlaveFailover() when our master is down. 2013-03-13 12:44:02 +01:00
antirez
bb4fef5a5a Cluster: update cluster state on PFAIL flag set/cleared on nodes. 2013-03-07 15:40:53 +01:00
antirez
75e7bb8fd5 Cluster: mark cluster state as fail of majority of masters is unreachable. 2013-03-07 15:36:59 +01:00
antirez
ca207a1fae Cluster: log global cluster state change. 2013-03-07 15:22:32 +01:00
antirez
311f9d5164 Cluster: clusterUpdateState() function simplified. 
Also the NEEDHELP Cluster state was removed as it will no longer be
used by Redis Cluster.
 2013-03-06 18:25:40 +01:00
antirez
72b16ffa96 Cluster: sdssplitargs_free() -> sdsfreesplitres(). 2013-03-06 12:38:06 +01:00
antirez
a0f2b39791 Cluster: connect to our master ASAP after startup if we are a slave node. 2013-03-05 16:12:08 +01:00
antirez
856a3160a9 Cluster: more robust FAIL flag cleaup. 
If we have a master in FAIL state that's reachable again, and apparently
no one is going to serve its slots, clear the FAIL flag and let the
cluster continue with its operations again.
 2013-03-05 15:05:32 +01:00
antirez
24aa7a566e Cluster: new node field fail_time. 
This is the unix time at which we set the FAIL flag for the node.
It is only valid if FAIL is set.

The idea is to use it in order to make the cluster more robust, for
instance in order to revert a FAIL state if it is long-standing but
still slots are assigned to this node, that is, no one is going to fix
these slots apparently.
 2013-03-05 13:15:05 +01:00
antirez
a06092c576 Cluster: A comment updated in clusterCron(). 2013-03-05 12:17:30 +01:00
antirez
de720e4f0a Cluster: send a ping to every node we never contacted in timeout/2 seconds. 
Usually we try to send just 1 ping every second, however when we detect
we are going to have unreliable failure detection because we can't ping
some node in time, send an additional ping.

This should only happen with very large clusters or when the the node
timeout is set to a very low value.
 2013-03-05 12:16:02 +01:00
antirez
401893bc38 Cluster: set node->slaveof correctly when a node state is updated. 2013-03-05 11:50:11 +01:00
antirez
8eb9c13dcf Cluster: don't perform startup slots sanity check for slaves. 
If we are a cluster node the DB content will not match our configured
slots. Don't do the check at all.
 2013-03-04 19:47:00 +01:00
antirez
63cac938b3 Cluster: fix maximum line length when loading config. 
There are pathological cases where the line can be even longer a single
node may contain all the slots in importing/migrating state.
 2013-03-04 19:45:36 +01:00
antirez
9e34d02450 Cluster: actually setup replication in CLUSTER REPLICATE. 2013-03-04 15:27:58 +01:00
antirez
e6da336d19 Cluster: REPLICATE subcommand and stub for clusterSetMaster(). 2013-03-04 13:15:09 +01:00
charsyam
466e2de67d adding check error code 
adding check error code
 2013-03-04 11:20:11 +01:00
antirez
19833a01f2 Cluster: don't set the slot as unassigned because of PONG info. 
As stated in the comment this is usually due to a resharding in progress
so the client should be still redirected to the old node that will
handle the redirection elsewhere.
 2013-02-28 15:54:29 +01:00
antirez
de254ffdb4 Cluster: better handling of slots changes in PONG packets. 
The new code makes sure that the node slots bitmap is always consistent
with the cluster->slots array.
 2013-02-28 15:41:54 +01:00
antirez
4d353074ba Cluster: refactoring of clusterNode*Bit to use helper bitmap functions. 2013-02-28 15:23:09 +01:00
antirez
a535d4b477 Cluster: use node->numslots instead of popcount() where possible. 2013-02-28 15:13:32 +01:00
antirez
7348dbc52c Cluster: new field in cluster node structure, "numslots". 
Before a relatively slow popcount() operation was needed every time we
needed to get the number of slots served by a given cluster node.
Now we just need to check an integer that is taken in sync with the
bitmap.
 2013-02-28 15:11:05 +01:00
antirez
bee0907fa4 Cluster: don't gossip about nodes that are not useful to the cluster. 2013-02-28 15:00:09 +01:00
antirez
1faf992b16 Cluster: CLUSTER FORGET implemented. 2013-02-27 17:55:59 +01:00
antirez
fae00c9998 Cluster: added a missing return on CLUSTER SETSLOT. 2013-02-27 17:53:48 +01:00
antirez
1841332778 Cluster: blank node address when flagging it as NOADDR. 2013-02-27 17:09:33 +01:00
antirez
48718d5dad Cluster: add comments in sub-sections of CLUSTER command. 2013-02-27 16:12:59 +01:00
antirez
646785ae48 Use GCC printf format attribute for redisLog(). 
This commit also fixes redisLog() statements producing warnings.
 2013-02-27 12:27:15 +01:00
antirez
a63b1196e0 Cluster: a few random fixes to the new failure detection. 2013-02-26 15:15:44 +01:00
antirez
2dec530e15 Cluster: log the event when we clear the FAIL flag. 2013-02-26 15:03:38 +01:00
antirez
79212927fb Cluster: use the failure report API to reimplement failure detection. 
The new system detects a failure only when there is quorum from masters.
 2013-02-26 14:58:39 +01:00
antirez
7ae78905f9 Cluster: invert two functions declarations in more natural order. 2013-02-26 11:19:48 +01:00
antirez
3f8fa86902 Cluster: cleanup idle failure reports every time we remove one. 
This is not very important as anyway when the function counting the
number of reports is called the cleanup is performed. However with this
change if only part of the nodes that reported the failure will report
the node is back ok, we'll cleanup the older entries ASAP. In complex
split net split scenarios, and when we are dealing with clusters having
nodes in the order of ~ 1000, this can save some CPU.
 2013-02-26 11:15:18 +01:00
antirez
d4b7d73115 Cluster: new function clusterNodeDelFailureReport() for failure reports. 
This is the missing part of the API that will be used to reimplement
failure detection of Cluster nodes.
 2013-02-25 19:13:22 +01:00
antirez
0b25267f52 Cluster: no limits for the count parameter of CLUSTER GETKEYSINSLOT. 
Not sure why I set a limit to 1 million keys, there is no reason for
this artificial limit, and anyway this is s a stupid limit because it is
already high enough to create latency issues. So let's the users shoot
on their feet because maybe they just actually know what they are doing.
 2013-02-25 12:41:13 +01:00
antirez
4b019d22cd Cluster: validate slot number in CLUSTER COUNTKEYSINSLOT. 2013-02-25 12:40:32 +01:00
antirez
5b1e7d3849 Cluster: new sub-command CLUSTER COUNTKEYSINSLOT. 
The new sub-command uses the new countKeysInSlot() API and allows a
cluster client to get the number of keys for a given hashslot.
 2013-02-25 12:04:31 +01:00
antirez
1f51d687dd Cluster: verifyClusterConfigWithData() implemented. 2013-02-25 11:43:49 +01:00
antirez
301f162a2d Cluster: fix case for getKeysInSlot() and countKeysInSlot(). 
Redis functions start in low case. A few functions about cluster were
capitalized the wrong way.
 2013-02-25 11:25:40 +01:00
antirez
a4b9ffec27 Cluster: use CountKeysInSlot() when we just need the count. 2013-02-25 11:23:04 +01:00
antirez
0b86a5e2d1 Cluster: added stub for verifyClusterConfigWithData(). 
See the top-comment for the function in this commit for details about
what the function is supposed to do.
 2013-02-25 11:20:17 +01:00
antirez
023a57a9d5 Cluster: if no previous config exists, create the myself node as master. 2013-02-22 19:24:01 +01:00
antirez
0c179977d8 Cluster: add cluster_size field in CLUSTER INFO output. 2013-02-22 19:20:38 +01:00
antirez
66cadd3ec9 Cluster: new state information, cluster size. 
The definition of cluster size is: the number of known nodes in the
cluster that are masters and serving at least an hash slot.
 2013-02-22 19:18:30 +01:00