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https://issues.apache.org/jira/browse/HDFS-11698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15993926#comment-15993926
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Anu Engineer commented on HDFS-11698:
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[~vagarychen] Thank you for getting this done. This undoubtedly is the most
significant tool in our arsenal for ozone debugging. I am thrilled to have this
tool.
+1, pending jenkins.
Few comments:
* I like that fact that we auto detect the the DB, that is a major step in
usability.
* May be as another JIRA -- some commands to work against the sqlite DB ? Of
the top of my head -- list of containers, Get Datanodes from container name
* May be as yet another JIRA -- Another table that logs datanode UUID to
container name or an index if that is possible so that we can print out all
containers for a given datanode
> Ozone: SCM: CLI: Add Debug command
> -----------------------------------
>
> Key: HDFS-11698
> URL: https://issues.apache.org/jira/browse/HDFS-11698
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Affects Versions: HDFS-7240
> Reporter: Anu Engineer
> Assignee: Chen Liang
> Attachments: HDFS-11698-HDFS-7240.001.patch
>
>
> This is not discussed as part of the standard command line set, since these
> are internal debug only commands.
> We have levelDB that stores key, value pairs and value is always binary
> blobs. These binary blobs can only be decoded using protobuf classes that are
> part of ozone.
> We would like to add an extension to SCM CLI which allows us to convert
> levelDB to SQLlite, since SQLlite would have structured data and standard SQL
> will work against it.
> The reason to use SQLlite instead of some dump file like json is the scale,
> it is possible that some levelDB files will have millions of keys, so having
> an SQL DB with proper index will make debugging much easier.
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