7.7 ILM Best Compression

Elastic Stack Elasticsearch
1

From the release notes of 7.7 there is
Adding best_compression #49974

I have upgraded to 7.7 and cannot find best compression under ILM and cannot find anything in the guides. Has thise been implemented yet?

Thanks
Phil

2

Yes, you do this by setting "codec": "best_compression" in the force-merge action.

3

Hi @DavidTurner,

I have tried modifying my ILM via the below:


PUT _ilm/policy/winlogbeat-7.5.0
{
  "policy": {
    "phases": {
      "warm": {
        "actions": {
          "forcemerge" : {
            "max_num_segments": 1,
            "codec": "best_compression"
          }
        }
      }
    }
  }
}

But i get:

{
  "error" : {
    "root_cause" : [
      {
        "type" : "x_content_parse_exception",
        "reason" : "[8:13] [forcemerge] unknown field [codec]"
      }
    ],
    "type" : "x_content_parse_exception",
    "reason" : "[8:22] [put_lifecycle_request] failed to parse field [policy]",
    "caused_by" : {
      "type" : "x_content_parse_exception",
      "reason" : "[8:22] [lifecycle_policy] failed to parse field [phases]",
      "caused_by" : {
        "type" : "x_content_parse_exception",
        "reason" : "[8:22] [phases] failed to parse field [warm]",
        "caused_by" : {
          "type" : "x_content_parse_exception",
          "reason" : "[8:22] [phase] failed to parse field [actions]",
          "caused_by" : {
            "type" : "x_content_parse_exception",
            "reason" : "[8:22] [actions] failed to parse field [forcemerge]",
            "caused_by" : {
              "type" : "x_content_parse_exception",
              "reason" : "[8:13] [forcemerge] unknown field [codec]"
            }
          }
        }
      }
    }
  },
  "status" : 400
}

Any suggestions?

4

Oh dear. It was supposed to be called codec but it seems it's actually index_codec in 7.7.0. I opened https://github.com/elastic/elasticsearch/issues/57034 to disentangle this.

5

@DavidTurner

Great thank you, it has now accepted that.

Thanks
Phil

6

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