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https://issues.apache.org/jira/browse/HADOOP-2075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12549785
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Chad Walters commented on HADOOP-2075:
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Eventually that might be true but merging is currently a manually-triggered
operation. Also, unless a more intelligent heuristic were in place, a small
region would count against a whole region server until it was merged, which
would slow down the loading.
> [hbase] Bulk load and dump tools
> --------------------------------
>
> Key: HADOOP-2075
> URL: https://issues.apache.org/jira/browse/HADOOP-2075
> Project: Hadoop
> Issue Type: New Feature
> Components: contrib/hbase
> Reporter: stack
> Priority: Minor
>
> Hbase needs tools to facilitate bulk upload and possibly dumping. Going via
> the current APIs, particularly if the dataset is large and cell content is
> small, uploads can take a long time even when using many concurrent clients.
> PNUTS folks talked of need for a different API to manage bulk upload/dump.
> Another notion would be to somehow have the bulk loader tools somehow write
> regions directly in hdfs.
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