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ruanhaishen
redis
Commits
299b8f76
Commit
299b8f76
authored
Mar 07, 2013
by
antirez
Browse files
Cluster: mark cluster state as fail of majority of masters is unreachable.
parent
abf06fd5
Changes
1
Hide whitespace changes
Inline
Side-by-side
src/cluster.c
View file @
299b8f76
...
...
@@ -1451,6 +1451,7 @@ int clusterDelSlot(int slot) {
* -------------------------------------------------------------------------- */
void
clusterUpdateState
(
void
)
{
int
j
,
initial_state
=
server
.
cluster
->
state
;
int
unreachable_masters
=
0
;
/* Start assuming the state is OK. We'll turn it into FAIL if there
* are the right conditions. */
...
...
@@ -1467,7 +1468,10 @@ void clusterUpdateState(void) {
}
/* Compute the cluster size, that is the number of master nodes
* serving at least a single slot. */
* serving at least a single slot.
*
* At the same time count the number of unreachable masters with
* at least one node. */
{
dictIterator
*
di
;
dictEntry
*
de
;
...
...
@@ -1477,12 +1481,25 @@ void clusterUpdateState(void) {
while
((
de
=
dictNext
(
di
))
!=
NULL
)
{
clusterNode
*
node
=
dictGetVal
(
de
);
if
(
node
->
flags
&
REDIS_NODE_MASTER
&&
node
->
numslots
)
if
(
node
->
flags
&
REDIS_NODE_MASTER
&&
node
->
numslots
)
{
server
.
cluster
->
size
++
;
if
(
node
->
flags
&
(
REDIS_NODE_FAIL
|
REDIS_NODE_PFAIL
))
unreachable_masters
++
;
}
}
dictReleaseIterator
(
di
);
}
/* If we can't reach at least half the masters, change the cluster state
* as FAIL, as we are not even able to mark nodes as FAIL in this side
* of the netsplit because of lack of majority. */
{
int
needed_quorum
=
(
server
.
cluster
->
size
/
2
)
+
1
;
if
(
unreachable_masters
>=
needed_quorum
)
server
.
cluster
->
state
=
REDIS_CLUSTER_FAIL
;
}
/* Log a state change */
if
(
initial_state
!=
server
.
cluster
->
state
)
redisLog
(
REDIS_WARNING
,
"Cluster state changed: %s"
,
...
...
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