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https://issues.apache.org/jira/browse/HDFS-9016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254145#comment-15254145
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Ming Ma commented on HDFS-9016:
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I can add a new config property or maybe a new fsck CLI option
"-upgradedomains" (similar to "-replicadetails") is better. That was my initial
plan too. But I still wondered if that is necessary.
The users has already explicitly opted in for this information to some degree,
given users has to set dfs.namenode.hosts.provider.classname to
CombinedHostFileManager with proper json file in order to config upgrade
domains. In addition users have to specify fsck CLI option like
"-replicadetails" to display it.
If down the road we need to add more properties to DN, does it mean we need to
add new fsck CLI option for each one of those, or can we use something more
general like "-replicadetails"?
Also as mentioned above, I am not sure how fsck output can maintain strict
compatibility when the block placement policy is changed via
dfs.block.replicator.classname.
> Display upgrade domain information in fsck
> ------------------------------------------
>
> Key: HDFS-9016
> URL: https://issues.apache.org/jira/browse/HDFS-9016
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Ming Ma
> Assignee: Ming Ma
> Attachments: HDFS-9016.patch
>
>
> This will make it easy for people to use fsck to check block placement when
> upgrade domain is enabled.
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