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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-74) [performance] When a get or scan request spans multiple columns, execute the reads in parallel
Date Sat, 17 Jan 2009 23:06:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-74?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-74:
-----------------------

    Priority: Critical  (was: Trivial)
     Summary: [performance] When a get or scan request spans multiple columns, execute the
reads in parallel  (was: [hbase] When a get or scan request spans multiple columns, execute
the reads in parallel)

Upping priority because its performance.  If many families, this could help.  We need to talk
to our Eitan.  He has written a paper on when to parallelize based on pset frontend experience.

> [performance] When a get or scan request spans multiple columns, execute the reads in
parallel
> ----------------------------------------------------------------------------------------------
>
>                 Key: HBASE-74
>                 URL: https://issues.apache.org/jira/browse/HBASE-74
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Jim Kellerman
>            Priority: Critical
>             Fix For: 0.20.0
>
>
> When a get or scan request spans multiple columns, execute the reads in parallel and
use a CountDownLatch to wait for them to complete before returning the results.

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