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https://issues.apache.org/jira/browse/HBASE-4198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-4198:
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Fix Version/s: (was: 0.95.0)
Moving unassigned improvement out of 0.95
> Harmonize HBA flush, compact and majorCompact
> ---------------------------------------------
>
> Key: HBASE-4198
> URL: https://issues.apache.org/jira/browse/HBASE-4198
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.90.4
> Reporter: Jean-Daniel Cryans
>
> As I mentioned on the mailing list, the way HBA.flush behaves is different
> from what is used to be. Right now here's how flush and compact work:
> - When calling HBA.flush it will fetch the list of regions then will contact
> their owners directly one by one and the flush will be done inline. The major
> issue here is flushing a big table will take a *long* time, but it does give
> some guarantee that all the flushes are done. The old behavior was that all
> flushes were done async.
> - For compactions it also calls every regions' owners one by one and instead
> of being inline the compactions are queued. This is not very different from
> the old behavior, except that the master has nothing to do now.
> What I believe we need to do:
> - Both methods should have the same guarantees, either they return when
> everything is flushed/compacted or they don't.
> - If we do inlining, we should issue the requests in parallel a la
> HTable.batch.
> - We definitely need to offer an async version.
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