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The current documentation recommends disabling allocations of all shards. This prevents shards of new indices from being allocated as well. That means that during a rolling upgrade, operations like roll over and index shrinking will operate correctly. This, in turn, can cause issues for data ingestion and ILM.
21 lines
706 B
Plaintext
21 lines
706 B
Plaintext
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When you shut down a node, the allocation process waits for
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`index.unassigned.node_left.delayed_timeout` (by default, one minute) before
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starting to replicate the shards on that node to other nodes in the cluster,
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which can involve a lot of I/O. Since the node is shortly going to be
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restarted, this I/O is unnecessary. You can avoid racing the clock by
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<<shards-allocation, disabling allocation>> of replicas before shutting down
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the node:
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[source,js]
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--------------------------------------------------
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PUT _cluster/settings
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{
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"persistent": {
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"cluster.routing.allocation.enable": "primaries"
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}
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}
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--------------------------------------------------
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// CONSOLE
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// TEST[skip:indexes don't assign]
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