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From "Ben Maurer (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1248) Fast splitting for last region
Date Sun, 08 Mar 2009 01:04:56 GMT
Fast splitting for last region
------------------------------

                 Key: HBASE-1248
                 URL: https://issues.apache.org/jira/browse/HBASE-1248
             Project: Hadoop HBase
          Issue Type: Improvement
            Reporter: Ben Maurer
             Fix For: 0.20.0


I have an HBase table where items are keyed by a sequential row id. When doing bulk appends
to this table, the last region of the table gets pretty large until enough compactions can
be done to sort everything out.

In this type of case, it'd be better if when the region serving the largest keys doesn't split
at the midkey, but on the last key. One way to implement this would be by saying that when
the top region reaches MAX_REGION_SIZE/2, create a new region, with the lower half getting
all the data and the top half empty. For bulk sequential inserts, this should avoid the need
for any compactions.

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