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From "Erik Holstad (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1548) give a time range in MapReduce
Date Fri, 19 Jun 2009 17:24:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721890#action_12721890
] 

Erik Holstad commented on HBASE-1548:
-------------------------------------

Yeah, I think that the idea is to give the MapReduce job a Scan object, in that case you can
use all the parameters of it inside that job.
There are just some things we need to figure out with the new MapReduce interface.

> give a time range in MapReduce
> ------------------------------
>
>                 Key: HBASE-1548
>                 URL: https://issues.apache.org/jira/browse/HBASE-1548
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: jaehong choi
>
> I've seen a lot of changes in client APIs by HBASE-1304 patch.
> We can give a time range when we scan a table with assign TimeRange instance to Scan
class.
> I also see some code in org.apache.hadoop.hbase.mapreduce.TableInputForamtBase.java,
which uses a scan instance to get a Scanner instance.
> I think we can also give a time range to query when we do mapreduce on hbase. 
> I've already apply this one to my local copy for my purpose, which is about time series
analysis.
> Thanks.

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