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https://issues.apache.org/jira/browse/HDFS-6673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14284596#comment-14284596
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Haohui Mai commented on HDFS-6673:
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bq. Thank you very much to pointing this out. In your patch, you have dumped
inodes to LevelDB sorted by its parent ID. I have tried this method, but in my
experiments, the time to dumping inodes and scan leveldb sequentially
overweights the benefits of sequential scanning.
For this particular purpose you don't necessarily store the inode into the db
-- putting the key in the db is sufficient.
bq. I assume that one directory was sequentially written to fsimage.
This does not hold. FSImage stores the inodes with no order. See
{{FSImageFormatPBINode#serializeINodeSection}}.
> Add Delimited format supports for PB OIV tool
> ---------------------------------------------
>
> Key: HDFS-6673
> URL: https://issues.apache.org/jira/browse/HDFS-6673
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 2.4.0
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Priority: Minor
> Attachments: HDFS-6673.000.patch, HDFS-6673.001.patch,
> HDFS-6673.002.patch, HDFS-6673.003.patch, HDFS-6673.004.patch,
> HDFS-6673.005.patch
>
>
> The new oiv tool, which is designed for Protobuf fsimage, lacks a few
> features supported in the old {{oiv}} tool.
> This task adds supports of _Delimited_ processor to the oiv tool.
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