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https://issues.apache.org/jira/browse/HDFS-12591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Virajith Jalaparti updated HDFS-12591:
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Attachment: HDFS-12591-HDFS-9806.004.patch
Posting a new patch (v4) that rebases v3 on the latest feature branch, and
removes the shared reference to the leveldb between {{LevelDBReader}} and
{{LevelDBWriter}}. The reader and writer are not intended to be used
simultaneously as provided storage just supports read-only as of now (hence,
removed {{testSimultaneousWriteAndRead}}). [~ehiggs], can you take a look at
this?
> [READ] Implement LevelDBFileRegionFormat
> ----------------------------------------
>
> Key: HDFS-12591
> URL: https://issues.apache.org/jira/browse/HDFS-12591
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: hdfs
> Reporter: Ewan Higgs
> Assignee: Ewan Higgs
> Priority: Minor
> Attachments: HDFS-12591-HDFS-9806.001.patch,
> HDFS-12591-HDFS-9806.002.patch, HDFS-12591-HDFS-9806.003.patch,
> HDFS-12591-HDFS-9806.004.patch
>
>
> The existing work for HDFS-9806 uses an implementation of the {{FileRegion}}
> read from a csv file. This is good for testability and diagnostic purposes,
> but it is not very efficient for larger systems.
> There should be a version that is similar to the {{TextFileRegionFormat}}
> that instead uses LevelDB.
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