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https://issues.apache.org/jira/browse/HBASE-27997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang reopened HBASE-27997:
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> Enhance prefetch executor to record region prefetch information along with
> the list of hfiles prefetched
> --------------------------------------------------------------------------------------------------------
>
> Key: HBASE-27997
> URL: https://issues.apache.org/jira/browse/HBASE-27997
> Project: HBase
> Issue Type: Sub-task
> Components: BucketCache
> Affects Versions: 2.6.0, 3.0.0-alpha-4
> Reporter: Rahul Agarkar
> Assignee: Rahul Agarkar
> Priority: Major
> Fix For: 3.0.0-beta-1
>
>
> HBASE-27313 implemented the prefetch persistence feature where it persists
> the list of hFiles prefetched in the bucket cache. This information is used
> to reconstruct the cache in the event of a server restart/crash.
> Currently, only the list of hFiles is persisted.
> However, for the new PrefetchAwareLoadBalancer (work in progress) to work, we
> need the information about how much a region is prefetched on a region server.
> This Jira introduces an additional map in the prefetch executor to maintain
> the information about how much a region has been prefetched on that region
> server. The size of region server prefetched is calculated as the total size
> of all hFiles prefetched for that region.
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