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https://issues.apache.org/jira/browse/HDFS-11470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15950224#comment-15950224
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Weiwei Yang commented on HDFS-11470:
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Hi [~anu]
Thanks for creating this, looks really good. I have some questions and comments
below,
# Permission. Who can run these commands, most of them seem to require admin
privilege, e.g create/delete container, pipeline, node pools; some other
commands might be applicable for normal users, info container, pipeline, node
pools. Usually commands under {{-admin}} requires admin permission and others
don't, is it same for SCM commands?
# Command output. What is the output of each command, json format data?
# Put key allows an argument {{-o}} to write a file into a container with they
key, does this only support local file? Does it make sense to support DFS
compatible files? Same as other {{-o}} options for other commands,
getContainer, getKey etc.
# List key seems required, otherwise how an user would know key names they can
possibly operate on? I implemented listKey API in HDFS-11569, we can have
similar API open for commandline, that way user can specify prefix, preKey name
and count to get a better looking result. This seamlessly can support list key
range by range if user wants.
# Create container. Container ID is more an internal thing, would it make sense
to let SCM return a container ID for user? Split this command to 2 phase call,
first {{hdfs scm -container create -p <pipelineID>}}, it returns a container ID
in the output, then {{hdfs scm -container create <containerID> -p
<pipelineID>}} to actually create it. If this is just for dev purpose, might
not be necessary.
# List container. Would it be useful to support {{-end}} option as well?
# Remove a node from pool. What happens at the backend, is it similar to
decommission this node? Do we move the containers on this node to another node
in the same pool?
# This might not be relevant, but still want to ask. Will it be necessary to
support balance pool? That says to move containers across nodes in a same pool
to get a better balanced disk usage.
Thanks
> Ozone: SCM: Add SCM CLI
> -----------------------
>
> Key: HDFS-11470
> URL: https://issues.apache.org/jira/browse/HDFS-11470
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Attachments: storage-container-manager-cli-v001.pdf
>
>
> This jira the describes the SCM CLI. Since CLI will have lots of commands, we
> will file other JIRAs for specific commands.
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