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Posted to dev@gora.apache.org by "Otis Gospodnetic (JIRA)" <ji...@apache.org> on 2014/01/03 05:04:54 UTC
[jira] [Commented] (GORA-117) gora hbase does not have a mechanism
to set the caching on a scanner, which makes for poor performance on
map/reduce jobs
[ https://issues.apache.org/jira/browse/GORA-117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861180#comment-13861180 ]
Otis Gospodnetic commented on GORA-117:
---------------------------------------
Should this get committed? I see [~jnioche] mentioned this in the Nutch draft for the board... Thanks.
> gora hbase does not have a mechanism to set the caching on a scanner, which makes for poor performance on map/reduce jobs
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: GORA-117
> URL: https://issues.apache.org/jira/browse/GORA-117
> Project: Apache Gora
> Issue Type: Bug
> Components: gora-hbase
> Affects Versions: 0.2
> Reporter: Eric Newton
> Assignee: stack
> Fix For: 0.4
>
>
> goraci runs a map/reduce job over all the data that it generates. The hbase storage uses a scanner that doesn't cache rows, which means every fetch requires an RPC call. I experimented with
> scan.setCaching(1000);
> and goraci Verify ran about 30x faster.
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