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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-1141) Fetching large numbers of columns is slow outside of HDFS
Date Tue, 03 Feb 2009 04:38:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jonathan Gray resolved HBASE-1141.

    Resolution: Won't Fix

Further experimentation showed there is a 40ms delay when a client is on the same node as
the regionserver, for certain payloads.

Since this is not a general issue and might even be tied to my particular environment, will
open another issue for that specific issue.

> Fetching large numbers of columns is slow outside of HDFS
> ---------------------------------------------------------
>                 Key: HBASE-1141
>                 URL: https://issues.apache.org/jira/browse/HBASE-1141
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Jonathan Gray
>             Fix For: 0.20.0
> While working on a Cell cache, we have found during random-read tests that the number
of columns has an enormous impact on performance.  Accounting for increased HDFS access time,
there is still a great deal of time being spent coming out of the Region and then across the
wire to HTable.
> Erik Holstad has done this testing and will post some of his results here when completed.

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