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https://issues.apache.org/jira/browse/HDFS-1435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12924286#action_12924286
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Hudson commented on HDFS-1435:
------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #415 (See
[https://hudson.apache.org/hudson/job/Hadoop-Hdfs-trunk-Commit/415/])
HDFS-1435. Provide an option to store fsimage compressed. Contributed by
Hairong Kuang.
> Provide an option to store fsimage compressed
> ---------------------------------------------
>
> Key: HDFS-1435
> URL: https://issues.apache.org/jira/browse/HDFS-1435
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.22.0
>
> Attachments: checkpoint-limitandcompress.patch,
> trunkImageCompress.patch, trunkImageCompress1.patch,
> trunkImageCompress2.patch, trunkImageCompress3.patch,
> trunkImageCompress4.patch
>
>
> Our HDFS has fsimage as big as 20G bytes. It consumes a lot of network
> bandwidth when secondary NN uploads a new fsimage to primary NN.
> If we could store fsimage compressed, the problem could be greatly alleviated.
> I plan to provide a new configuration hdfs.image.compressed with a default
> value of false. If it is set to be true, fsimage is stored as compressed.
> The fsimage will have a new layout with a new field "compressed" in its
> header, indicating if the namespace is stored compressed or not.
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