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From "Erik Holstad (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-80) [hbase] Add a cache of 'hot' cells
Date Tue, 17 Feb 2009 18:45:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12674294#action_12674294

Erik Holstad commented on HBASE-80:

Was thinking that it is not really clear to me how the new setup where a Class is aware of
it size,
implementing HeapSize, is going to be used for the rest of the project. So I propose that
for now
have 2 different versions of Cell and HbaseMapWritable, one that keeps track of the size and
that doesn't, so the overhead of keeping the size doesn't slow down other use cases. 
Another question is also where and when to do the calculation of the size, I have chosen to
it in the puts, adds and removes because I think that it is going to be read many scenario
for these

> [hbase] Add a cache of 'hot' cells
> ----------------------------------
>                 Key: HBASE-80
>                 URL: https://issues.apache.org/jira/browse/HBASE-80
>             Project: Hadoop HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: stack
>            Assignee: Erik Holstad
>            Priority: Minor
>             Fix For: 0.20.0
>         Attachments: cache.patch, Cell.java, hbase-80-v1.patch, HeapSize.java, LruHashMap.java,
LruHashMapTester.java, MemoryTester.java, WR_PE.java

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