ILM not working correctly

Elastic Stack Elasticsearch
#1

Hello,

Need some help / advice with ILM. I set up ILM policy to move data to cold tier, after exact amount of days, but for some reason it did not trigger migrate action. I then started to experiment with ILM console commands, to try and manually move some data to cold but made it worse, for a moment policy changed to cold in 0ms and all the data was moved to cold. I now edited my policy the way I want but data is not going back to hot. Is it possible to somehow force it migrate back to hot from cold?

#2

It'd be useful if you could please share your ILM policy and an explain on it so we can see what is happening.

#3

Hello, ILM newbie here. ILM is designed to go only one way - from hotter to colder. It never goes back. I think its a safety feature.

If you want your indices moved from cold to hot, I see two largely independent things to handle

  1. Manually undoing changes to your index settings, e.g. to Index-level data tier allocation filtering | Elasticsearch Guide [8.2] | Elastic
  2. Changing the current phase in ILM - best way depends on your ILM policy.