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https://issues.apache.org/jira/browse/HBASE-13034?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell resolved HBASE-13034.
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Resolution: Not A Problem
> 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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