Index lifecycle actionsedit

Move shards to nodes with different performance characteristics and reduce the number of replicas.
Permanently remove the index.
Force merge
Reduce the number of index segments and purge deleted documents. Makes the index read-only.
Freeze the index to minimize its memory footprint.
Move the index shards to the data tier that corresponds to the current ILM phase.
Read only
Block write operations to the index.
Remove the index as the write index for the rollover alias and start indexing to a new index.
Searchable snapshot
[beta] This functionality is in beta and is subject to change. The design and code is less mature than official GA features and is being provided as-is with no warranties. Beta features are not subject to the support SLA of official GA features. Take a snapshot of the managed index in the configured repository and mount it as a searchable snapshot.
Set priority
Lower the priority of an index as it moves through the lifecycle to ensure that hot indices are recovered first.
Reduce the number of primary shards by shrinking the index into a new index.
Convert a follower index to a regular index. Performed automatically before a rollover, shrink, or searchable snapshot action.
Wait for snapshot
Ensure that a snapshot exists before deleting the index.