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From "Liang Xie (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-9855) evictBlocksByHfileName improvement for bucket cache
Date Tue, 29 Oct 2013 07:11:31 GMT
Liang Xie created HBASE-9855:
--------------------------------

             Summary: evictBlocksByHfileName improvement for bucket cache
                 Key: HBASE-9855
                 URL: https://issues.apache.org/jira/browse/HBASE-9855
             Project: HBase
          Issue Type: Improvement
          Components: regionserver
    Affects Versions: 0.98.0
            Reporter: Liang Xie
            Assignee: Liang Xie
         Attachments: HBase-9855.txt

In deed, it comes from fb's l2 cache by [~avf]'s nice work,  i just did a simple backport
here. It could improve a linear-time search through the whole cache map into a log-access-time
map search.
I did a small bench, showed it brings a bit gc overhead, but considering the evict on close
triggered by frequent compaction activity, seems reasonable?

and i thought bring a "evictOnClose" config  into BucketCache ctor and only put/remove the
new index map while evictOnClose is true, seems this value could be set by each family schema,
but BucketCache is a global instance not per each family, so just ignore it rightnow...



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