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https://issues.apache.org/jira/browse/HDFS-12282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16136401#comment-16136401
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Weiwei Yang commented on HDFS-12282:
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Hi [~anu]
Thanks for your quick comments. I have addressed all in v2 patch except the
last one, are you suggesting to run the code in
{{SCMNodeManager#handleHeartbeat}} in a thread? I am not sure why that is
necessary. This part of change only scans the block deletion transaction log,
get a throttled number of transactions and add them to the {{commandQueue}},
there is no heavy I/O involved. We can certainly have some more discussion
about this, probably tomorrow.
Thank you!
> Ozone: DeleteKey-4: Block delete via HB between SCM and DN
> ----------------------------------------------------------
>
> Key: HDFS-12282
> URL: https://issues.apache.org/jira/browse/HDFS-12282
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, ozone, scm
> Reporter: Weiwei Yang
> Assignee: Weiwei Yang
> Attachments: Block delete via HB between SCM and DN.png,
> HDFS-12282-HDFS-7240.001.patch, HDFS-12282-HDFS-7240.002.patch,
> HDFS-12282.WIP.patch
>
>
> This is the task 3 in the design doc, implements the SCM to datanode
> interactions. Including
> # SCM sends block deletion message via HB to datanode
> # datanode changes block state to deleting when processes the HB response
> # datanode sends deletion ACKs back to SCM
> # SCM handles ACKs and removes blocks in DB
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