[HBASE-27313] Persist list of Hfiles names for which prefetch is done

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha-3
• Fix Version/s: 2.6.0, 3.0.0-alpha-4
• Component/s: BucketCache
• Assignee: Shanmukha Haripriya Kota
• Reporter: Shanmukha Haripriya Kota
• Created: 22/Aug/22 16:04
• Updated: 26/Mar/24 13:40
• Resolved: 21/Mar/23 14:37

Description

Persist list of Hfiles names for which prefetch is completed when persist for in-memory bucket cache mapping state is enabled.

We need to persist the Set, which contains a list of all the HFiles for which the prefetch has completed along with the In-memory state of the bucket cache so that when we restart and if any prefetch is scheduled again for the same HFile and we already have the in-memory state retrieved, we can skip the prefetch for it.

Issue Links

• is related to: HBASE-27743 Enhancements for the persistent cache
• is related to: HBASE-28450 BuckeCache.evictBlocksByHfileName won't work after a cache recovery from file
• links to: GitHub Pull Request #4726
• links to: GitHub Pull Request #4771