Add support for a FileCacheDecider #8535
Description
Is your feature request related to a problem? Please describe.
- File cache was introduced as a part of searchable snapshots which helped to keep track of local blocks
- Current allocation mechanisms do not have any constraints based on the file cache stats. Some changes were added as a part of Add safeguard limits for file cache during node level allocation #8208 to the
DiskThresholdDecider
Describe the solution you'd like
- Allocation decisions should be taken based on the file cache stats (available storage, assigned shard remote size) to make better decisions for file cache performance
Describe alternatives you've considered
- Colocate changes as a part of
DiskThresholdDecider