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https://issues.apache.org/jira/browse/HBASE-5559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230699#comment-13230699
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Lars Hofhansl commented on HBASE-5559:
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Patch looks good.
(If I wanted to split hairs I'd say that if the number of splits is approaching
the size of the keyspace you'd run into funky integer arithmetic.
Say the keyspace is 100 and presplits is 30. You'd get 29 regions of size 3 and
one of size 10... But do not want to split hairs :) )
> --presplit option creates a first split with rowkey-end=0
> ---------------------------------------------------------
>
> Key: HBASE-5559
> URL: https://issues.apache.org/jira/browse/HBASE-5559
> Project: HBase
> Issue Type: Bug
> Components: util
> Reporter: Sujee Maniyam
> Assignee: Sujee Maniyam
> Priority: Trivial
> Labels: benchmark
> Attachments: 5559_v1.patch, HBASE-5559-v2.patch
>
>
> HBASE-4440 adds a 'presplit' option to PerformanceEvaluation utility.
> when the splits are generated, the first split has row-end-key=0 (zero).
> Hence this split doesn't get any data.
> For example,
> if total keyspace is 100, and splits requested are 5,
> generated splits => [0, 20, 40, 60, 80]
> it should be => [20, 40, 60, 80, 100]
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