Autoscaling deciders
- Reactive storage decider
- Estimates required storage capacity of current data set. Available for policies governing data nodes.
- Proactive storage decider
- Estimates required storage capacity based on current ingestion into hot nodes. Available for policies governing hot data nodes.
- Frozen shards decider
- Estimates required memory capacity based on the number of partially mounted shards. Available for policies governing frozen data nodes.
- Frozen storage decider
- Estimates required storage capacity as a percentage of the total data set of partially mounted indices. Available for policies governing frozen data nodes.
- Frozen existence decider
- Estimates a minimum require frozen memory and storage capacity when any index is in the frozen ILM phase.
- Machine learning decider
- Estimates required memory capacity based on machine learning jobs. Available for policies governing machine learning nodes.
- Fixed decider
- Responds with a fixed required capacity. This decider is intended for testing only.
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https://www.elastic.co/guide/en/elasticsearch/reference/7.17/autoscaling-deciders.html
