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https://issues.apache.org/jira/browse/HDFS-516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jay Booth updated HDFS-516:
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Attachment: radfs.tgz
Oops. Shows what I get for posting at the end of the day, svn diff misses new
files, duh. Here's a tarball of src/contrib/radfs. build.xml should play well
with the rest of hadoop
> Low Latency distributed reads
> -----------------------------
>
> Key: HDFS-516
> URL: https://issues.apache.org/jira/browse/HDFS-516
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Jay Booth
> Priority: Minor
> Attachments: radfs.patch, radfs.tgz
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> I created a method for low latency random reads using NIO on the server side
> and simulated OS paging with LRU caching and lookahead on the client side.
> Some applications could include lucene searching (term->doc and doc->offset
> mappings are likely to be in local cache, thus much faster than nutch's
> current FsDirectory impl and binary search through record files (bytes at
> 1/2, 1/4, 1/8 marks are likely to be cached)
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