87076c32e2
Determines the shard size of shards before allocating shards that are recovering from snapshots. It ensures during shard allocation that the target node that is selected as recovery target will have enough free disk space for the recovery event. This applies to regular restores, CCR bootstrap from remote, as well as mounting searchable snapshots. The InternalSnapshotInfoService is responsible for fetching snapshot shard sizes from repositories. It provides a getShardSize() method to other components of the system that can be used to retrieve the latest known shard size. If the latest snapshot shard size retrieval failed, the getShardSize() returns ShardRouting.UNAVAILABLE_EXPECTED_SHARD_SIZE. While we'd like a better way to handle such failures, returning this value allows to keep the existing behavior for now. Note that this PR does not address an issues (we already have today) where a replica is being allocated without knowing how much disk space is being used by the primary. Co-authored-by: Yannick Welsch <yannick@welsch.lu> |
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