gora-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eric Newton (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (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
Date Tue, 10 Apr 2012 21:39:16 GMT

     [ https://issues.apache.org/jira/browse/GORA-117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Newton updated GORA-117:
-----------------------------

    Description: 
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.

  was:
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.setCache(1000);

and goraci Verify ran about 30x faster.

    
> 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: storage-hbase
>            Reporter: Eric Newton
>
> 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message