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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/04/25 07:06:30 UTC
[jira] Commented: (HBASE-1183) New MR splitting algorithm and other
new features need a way to split a key range in N chunks
[ 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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