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From "Feng Honghua (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10280) Make inMemoryForceMode of LruBlockCache configurable per column-family
Date Sat, 04 Jan 2014 02:33:51 GMT
Feng Honghua created HBASE-10280:
------------------------------------

             Summary: Make inMemoryForceMode of LruBlockCache configurable per column-family
                 Key: HBASE-10280
                 URL: https://issues.apache.org/jira/browse/HBASE-10280
             Project: HBase
          Issue Type: Improvement
          Components: io, regionserver
            Reporter: Feng Honghua
            Assignee: Feng Honghua


An extension of [HBASE-10273|https://issues.apache.org/jira/browse/HBASE-10263] per [~yuzhihong@gmail.com]'s
suggestion.

brief description of this extension is as below:
1. if the global inMemoryForceMode is on, all in-memory blocks are preemptive no matter what
their per-column-family inMemoryForceMode are;
2. if the global inMemoryForceMode is off, only in-memory blocks of column-family with inMemoryForceMode
on are preemptive; non-preemptive inMemory blocks respect the single/multi/memory ratio;

In short, global flag dominates, and per-column-family flag can only control its own blocks.



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