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https://issues.apache.org/jira/browse/HBASE-4365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214134#comment-13214134
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Jean-Daniel Cryans commented on HBASE-4365:
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bq. Got any comparison numbers for total import time, for say 100G load?
Not yet, but I can definitely see that it jumpstarts the import.
bq. Would be good to know that the new heuristic is definitely advantageous.
It is, I don't need numbers to tell you that.
> Add a decent heuristic for region size
> --------------------------------------
>
> Key: HBASE-4365
> URL: https://issues.apache.org/jira/browse/HBASE-4365
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.92.1, 0.94.0
> Reporter: Todd Lipcon
> Priority: Critical
> Labels: usability
> Attachments: 4365-v2.txt, 4365.txt
>
>
> A few of us were brainstorming this morning about what the default region
> size should be. There were a few general points made:
> - in some ways it's better to be too-large than too-small, since you can
> always split a table further, but you can't merge regions currently
> - with HFile v2 and multithreaded compactions there are fewer reasons to
> avoid very-large regions (10GB+)
> - for small tables you may want a small region size just so you can
> distribute load better across a cluster
> - for big tables, multi-GB is probably best
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