fluencelabs/redis
1
0
Fork 0
mirror of https://github.com/fluencelabs/redis synced 2025-03-17 16:10:50 +00:00
Code Issues Projects Releases Wiki Activity

Cluster: don't migrate to a master that never had slaves.

Browse Source 
Replica migration algorithm modified so that slaves never try to migrate
to masters that were never configured to have slaves in the past.
We want the algorithm to take care of masters that remained without
*working* slaves, but that used to have slaves according to the cluster
configuration.
This commit is contained in:
antirez 2014-07-25 11:02:09 +02:00
parent 7eb47ae290
commit 0d9bcb1c12
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/cluster.c
View File

@ -2674,6 +2674,10 @@ void clusterHandleSlaveMigration(int max_slaves) {
/* Only iterate over working masters. */
if (nodeIsSlave(node) || nodeFailed(node)) continue;
/* If this master never had slaves so far, don't migrate. We want
* to migrate to a master that remained orphaned, not masters that
* were never configured to have slaves. */
if (node->numslaves == 0) continue;
okslaves = clusterCountNonFailingSlaves(node);
if (okslaves == 0 && target == NULL && node->numslots > 0)
@ -2912,7 +2916,11 @@ void clusterCron(void) {
if (nodeIsSlave(myself) && nodeIsMaster(node) && !nodeFailed(node)) {
int okslaves = clusterCountNonFailingSlaves(node);
if (okslaves == 0 && node->numslots > 0) orphaned_masters++;
/* A master is orphaned if it is serving a non-zero number of
* slots, have no working slaves, but used to have at least one
* slave. */
if (okslaves == 0 && node->numslots > 0 && node->numslaves)
orphaned_masters++;
if (okslaves > max_slaves) max_slaves = okslaves;
if (nodeIsSlave(myself) && myself->slaveof == node)
this_slaves = okslaves;