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Document woes between auto-expand-replicas and allocation filtering #30531

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May 14, 2018
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Document woes between auto-expand-replicas and allocation filtering #30531

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Document woes between auto-expand-replicas and allocation filtering
ywelsch May 11, 2018
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ywelsch May 11, 2018
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9 changes: 7 additions & 2 deletions docs/reference/index-modules.asciidoc
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Expand Up @@ -103,9 +103,14 @@ specific index module:

`index.auto_expand_replicas`::

Auto-expand the number of replicas based on the number of available nodes.
Auto-expand the number of replicas based on the number of data nodes in the cluster.
Set to a dash delimited lower and upper bound (e.g. `0-5`) or use `all`
for the upper bound (e.g. `0-all`). Defaults to `false` (i.e. disabled).
for the upper bound (e.g. `0-all`). Defaults to `false` (i.e. disabled).
Note that the auto-expanded number of replicas does not take any other allocation
rules into account, such as <<allocation-awareness,shard allocation awareness>>,
<<shard-allocation-filtering,filtering>> or <<allocation-total-shards,total shards per node>>,
and this can lead to the cluster health becoming `YELLOW` if the applicable rules
prevent all the replicas from being allocated.

`index.search.idle.after`::
How long a shard can not receive a search or get request until it's considered
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