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From "Jonathan Gray (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-4422) Move block cache parameters and references into single CacheConf class
Date Wed, 12 Oct 2011 04:19:11 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4422?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Gray resolved HBASE-4422.
----------------------------------

      Resolution: Fixed
    Release Note: Relocates all cache configuration options and constants into a new CacheConfig
class.  Modifies lots of constructors from Store/StoreFile down to HFile.
    Hadoop Flags: Reviewed

Committed to trunk and branch.  Thanks everyone for all the reviews.  Thanks Mikhail for all
the back and forth!
                
> Move block cache parameters and references into single CacheConf class
> ----------------------------------------------------------------------
>
>                 Key: HBASE-4422
>                 URL: https://issues.apache.org/jira/browse/HBASE-4422
>             Project: HBase
>          Issue Type: Improvement
>          Components: io
>            Reporter: Jonathan Gray
>            Assignee: Jonathan Gray
>             Fix For: 0.92.0
>
>         Attachments: CacheConfig92-v8.patch, HBASE-4422-FINAL-branch92.patch, HBASE-4422-FINAL-trunk.patch
>
>
> From StoreFile down to HFile, we currently use a boolean argument for each of the various
block cache configuration parameters that exist.  The number of parameters is going to continue
to increase as we look at compressed cache, delta encoding, and more specific L1/L2 configuration.
 Every new config currently requires changing many constructors because it introduces a new
boolean.
> We should move everything into a single class so that modifications are much less disruptive.

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