Rollover exact definition in ILM policy

Elastic Stack Elasticsearch
#1

Hello all !

In the delete phase of the ILM policy, we can delete x days or x hours from rollover.

But what is exactly this "rollover" ? :

  • Is it the date when index has been renewed as he reached max size (or documents or age) ?

  • What about if I have hot/warm/cold architecture ? Rollover will be when index has been renewed ? Or when index has been shrinked in warm phase ?

Thanks ! :slight_smile:

#2

Rollover is when it reaches the max limit (age or size) and then creates a new write index under the alias.

It can happen independent of hot/warm/cold, as you can roll indices on a single node for eg.

#3

Thanks for this confirmation @warkolm !

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#4

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