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https://issues.apache.org/jira/browse/HDFS-1800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13014847#comment-13014847
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Todd Lipcon commented on HDFS-1800:
-----------------------------------
Actually, I suppose option #1 doesn't prevent the use of this tool. ie we can
have a file {{fsimage_1.md5}} which contains the single line {{<md5sum>
fsimage_1}}. Then {{md5sum -c *.md5}} works just as well as in option 2.
> Extend image checksumming to function with multiple fsimage files
> -----------------------------------------------------------------
>
> Key: HDFS-1800
> URL: https://issues.apache.org/jira/browse/HDFS-1800
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: Edit log branch (HDFS-1073)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: Edit log branch (HDFS-1073)
>
>
> HDFS-903 added the MD5 checksum of the fsimage to the VERSION file in each
> image directory. This allows it to verify that the FSImage didn't get
> corrupted or accidentally replaced on disk.
> With HDFS-1073, there may be multiple fsimage_N files in a storage directory
> corresponding to different checkpoints. So having a single MD5 in the VERSION
> file won't suffice. Instead we need to store an MD5 per image file.
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