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Date: Fri, 24 Apr 2009 22:06:30 -0700 (PDT)
From: "stack (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1183) New MR splitting algorithm and other
 new features need a way to split a key range in N chunks
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    [ https://issues.apache.org/jira/browse/HBASE-1183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12702650#action_12702650 ] 

stack commented on HBASE-1183:
------------------------------

Jon'ey, patch looks good, but how about a unit test if only to demo how useful your fancy new BigInteger doohickey is?  I can help... or, since we now have a TestBytes class, it should be super easy: testSplit....

> New MR splitting algorithm and other new features need a way to split a key range in N chunks
> ---------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1183
>                 URL: https://issues.apache.org/jira/browse/HBASE-1183
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: util
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>            Priority: Minor
>             Fix For: 0.20.0
>
>         Attachments: hbase-1183-v1.patch, hbase-1183-v2.patch, hbase-1183-v3.patch, hbase-1183-v4.patch
>
>
> For HBASE-1172 and other functionality coming soon, we need to be able to take a [start,stop) range and divide it into chunks.
> For example, we have 10 regions but want to run 30 maps.  We need to divide each region into three key ranges for the start/stop of each scanner.
> Implementing using java.math.BigInteger
> Will also include a couple additional helpers in Bytes to make life easy.

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