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https://issues.apache.org/jira/browse/CASSANDRA-408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-408:
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Attachment: 0003-productize-mmap-approach-handle-files-2GB-by-chunking-.txt
0002-Implement-FileDataInput-with-MappedFileDataInput-backe.txt
0001-add-FileDataInput-implemented-by-BufferedRandomAccessF.txt
> Pool BufferedRandomAccessFile objects used by sstable reads
> -----------------------------------------------------------
>
> Key: CASSANDRA-408
> URL: https://issues.apache.org/jira/browse/CASSANDRA-408
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Chris Goffinet
> Fix For: 0.9
>
> Attachments:
> 0001-add-FileDataInput-implemented-by-BufferedRandomAccessF.txt,
> 0002-Implement-FileDataInput-with-MappedFileDataInput-backe.txt,
> 0003-productize-mmap-approach-handle-files-2GB-by-chunking-.txt, 408.patch,
> commons-pool-1.5.2.jar
>
>
> not only does BRAF per op do a whole lot of extra fopens, but the buffering
> actually makes it _more_ expensive to set up since on the jvm all primitive
> arrays are initialized to zero.
> this adds a simple read test to stress.py; I'm seeing about a 10% increase in
> throughput which is worth 200loc imo.
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