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From "Misty Stanley-Jones (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-11985) Document sizing rules of thumb
Date Tue, 16 Sep 2014 05:04:33 GMT
Misty Stanley-Jones created HBASE-11985:
-------------------------------------------

             Summary: 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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