If I follow the steps in the Rolling Upgrade docs in the order they're written, it seems to suggest performing a flush for every node I upgrade in my cluster. Is this really necessary, or would performing the flush once at the very beginning of the rolling upgrade probably be enough for purposes of…

If you're not indexing at all then it's a wash: it won't make recovery any faster but nor will it take any time to do the flush for each node. If you carry on indexing then I'd usually expect repeated flushes to save time overall — that's why it's recommended — but the time saved is going to depend …

Rolling upgrade: How many times should I flush?

Elastic Stack Elasticsearch

kkn87 (Konstantin) January 18, 2021, 7:38am 12

@Dennis1, thank you for noticing this! Will remove this step from the automation.

Topic		Replies	Views
Quickly restarting a node Elasticsearch	6	644	April 11, 2019
Why ES node starts recovering all the data from other nodes after reboot? Elasticsearch	17	552	July 6, 2017
Noob Question: Why is restarting a node anything other than instantaneous? Elasticsearch	7	414	July 6, 2017
Restarting an active node without needing to recover all data remotely Elasticsearch	13	5162	July 6, 2017
Restarting of node taking much time Elasticsearch	6	2494	July 6, 2017

Rolling upgrade: How many times should I flush?

Related topics