quick recovery after node restart in elasticsearch

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Consider the below settings in the elasticsearch.yml

gateway.recover_after_data_nodes: 3
gateway.recover_after_time: 5m
gateway.expected_data_nodes: 3

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感动是毒

2020-12-25 09:20

For Elasticsearch version >= 1.0.0:

curl -XPUT localhost:9200/_cluster/settings -d '{"transient":{"cluster.routing.allocation.enable": "none"}}'
/etc/init.d/elasticsearch restart
curl -XPUT localhost:9200/_cluster/settings -d '{"transient":{"cluster.routing.allocation.enable": "all"}}'

For earlier version of ES:

curl -XPUT localhost:9200/_cluster/settings -d '{"transient":{"cluster.routing.allocation.disable_allocation": true}}'
/etc/init.d/elasticsearch restart
curl -XPUT localhost:9200/_cluster/settings -d '{"transient":{"cluster.routing.allocation.disable_allocation": false}}'

Shard keep unallocated until "cluster.routing.allocation.disable_allocation": false, then shards recover on the server just restarted (starting at size they were before shutdown) It is very quick.

Reference: http://elasticsearch-users.115913.n3.nabble.com/quick-recovery-after-node-restart-in-elasticsearch-td4033876.html#a4034211

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