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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5651) remove dfs.namenode.caching.enabled
Date Wed, 11 Dec 2013 00:57:07 GMT
Colin Patrick McCabe created HDFS-5651:
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             Summary: remove dfs.namenode.caching.enabled
                 Key: HDFS-5651
                 URL: https://issues.apache.org/jira/browse/HDFS-5651
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
    Affects Versions: 3.0.0
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe


We can remove dfs.namenode.caching.enabled and simply always enable caching, similar to how
we do with snapshots and other features.  The main overhead is the size of the cachedBlocks
GSet.  However, we can simply make the size of this GSet configurable, and people who don't
want caching can set it to a very small value.



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