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Docs: Documented cancelation of shard recovery

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Relates to #12421
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Clinton Gormley 2015-08-07 19:44:34 +02:00
parent 7efc419041
commit c22e179e87
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docs/reference/index-modules/allocation/delayed.asciidoc
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@ -60,6 +60,17 @@ NOTE: This setting will not affect the promotion of replicas to primaries, nor
will it affect the assignment of replicas that have not been assigned
previously.
==== Cancellation of shard relocation
If delayed allocation times out, the master assigns the missing shards to
another node which will start recovery. If the missing node rejoins the
cluster, and its shards still have the same sync-id as the primary, shard
relocation will be cancelled and the synced shard will be used for recovery
instead.
For this reason, the default `timeout` is set to just one minute: even if shard
relocation begins, cancelling recovery in favour of the synced shard is cheap.
==== Monitoring delayed unassigned shards
The number of shards whose allocation has been delayed by this timeout setting