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https://issues.apache.org/jira/browse/HBASE-13034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321091#comment-14321091
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Nick Dimiduk commented on HBASE-13034:
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I take it you are using the Import tool. Are you using it in normal "online"
mode, or are you using it to generate HFiles? Your title says the latter, but
your description seems the former. It sounds like the destination table should
be split before the large import job begins. Can you give any more details?
> Importing rows with bulkupload can overload single regionservers
> ----------------------------------------------------------------
>
> Key: HBASE-13034
> URL: https://issues.apache.org/jira/browse/HBASE-13034
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Affects Versions: 0.98.0
> Reporter: Bryant Khau
> Priority: Minor
>
> Exporting a table with a common schema, like hashes as the key, will result
> in a sorted exported file. When imported with
> org.apache.hadoop.hbase.mapreduce.Import, region servers can be overloaded
> one by one by requests by the MapReduce job, since the rows are imported in
> sequential order, and a regions span ranges in sequential order. This is more
> likely to happen with lots of data and not a lot of regions.
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