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https://issues.apache.org/jira/browse/HBASE-1183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13131261#comment-13131261
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Jonathan Gray commented on HBASE-1183:
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Wow, really got me thinking back. I honestly don't remember exactly why.
We convert them to BigInteger so we can do: (stop - start) / numsplits =
interval
Something related to signed/unsigned? Reading the code it does seem okay.
Good thing I didn't write a unit test.
Are you seeing that it's broken in some way? I can spend a little more time
looking at it if necessary.
> 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: 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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