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https://issues.apache.org/jira/browse/HDFS-7343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15812285#comment-15812285
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Anu Engineer commented on HDFS-7343:
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bq. Some methodologies existed in NN to collect metrics and events from DNs, so
it's better to store these data in NN to make SSM stateless as suggested by
Andrew.
Could you please point me to this suggestion from Andrew. I would like to
understand what he is saying better.
> HDFS smart storage management
> -----------------------------
>
> Key: HDFS-7343
> URL: https://issues.apache.org/jira/browse/HDFS-7343
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Kai Zheng
> Assignee: Wei Zhou
> Attachments: HDFS-Smart-Storage-Management-update.pdf,
> HDFS-Smart-Storage-Management.pdf, move.jpg
>
>
> As discussed in HDFS-7285, it would be better to have a comprehensive and
> flexible storage policy engine considering file attributes, metadata, data
> temperature, storage type, EC codec, available hardware capabilities,
> user/application preference and etc.
> Modified the title for re-purpose.
> We'd extend this effort some bit and aim to work on a comprehensive solution
> to provide smart storage management service in order for convenient,
> intelligent and effective utilizing of erasure coding or replicas, HDFS cache
> facility, HSM offering, and all kinds of tools (balancer, mover, disk
> balancer and so on) in a large cluster.
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