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https://issues.apache.org/jira/browse/HBASE-11985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135971#comment-14135971
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Jonathan Hsieh commented on HBASE-11985:
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Pending mob work is targeted for 100k-10mb range. tbd to see if it is makes
sens for 10mb-64mb. (if you have a few it would be ok, but if you have a lot).
A large number of *column families* probably means you are doing it wrong.
> Document sizing rules of thumb
> ------------------------------
>
> Key: HBASE-11985
> URL: https://issues.apache.org/jira/browse/HBASE-11985
> Project: HBase
> Issue Type: Task
> Components: documentation
> Reporter: Misty Stanley-Jones
> Assignee: Misty Stanley-Jones
>
> I'm looking for tuning/sizing rules of thumb to put in the Ref Guide.
> Info I have gleaned so far:
> A reasonable region size is between 10 GB and 50 GB.
> A reasonable maximum cell size is 1 MB to 10 MB. If your cells are larger
> than 10 MB, consider storing the cell contents in HDFS and storing a
> reference to the location in HBase. Pending MOB work for 10 MB - 64 MB window.
> When you size your regions and cells, keep in mind that a region cannot split
> across a row. If your row size is too large, or your region size is too
> small, you can end up with a single row per region, which is not a good
> pattern. It is also possible that one big column causes splits while other
> columns are tiny, and this may not be great.
> A large # of columns probably means you are doing it wrong.
> Column names need to be short because they get stored for every value
> (barring encoding). Don't need to be self-documenting like in RDBMS.
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