[jira] [Commented] (HBASE-18905) Allow CPs to request flush/compaction on Region

["Duo Zhang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-18905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16185311#comment-16185311 ] 

Duo Zhang commented on HBASE-18905:
-----------------------------------

The intention of passing a CompactionLifeCtyleTracker is that, it will also be passed to RegionObserver, so that they could pass some information to the RegionObserver implementation.

> Allow CPs to request flush/compaction on Region
> -----------------------------------------------
>
>                 Key: HBASE-18905
>                 URL: https://issues.apache.org/jira/browse/HBASE-18905
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Coprocessors
>            Reporter: Anoop Sam John
>            Assignee: Anoop Sam John
>             Fix For: 2.0.0-alpha-4
>
>
> Follow up for HBASE-18183
> As per that Jira, we keep only requestCompaction API in Region.  We did not have any such for flush in Region.  Only API which was there is a flush which will block the callee unless flush is done. This issue has to tacke
> 1. Decide whether we need a requestFlush in Region and if so add
> 2. Whether the requestCompaction (And requestFlush too) should return a Future?  Right now the former do  not return any but allow to pass a CompactionLifeCycleTracker which will get notified on start and end of compaction.



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