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From "Wei Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7343) HDFS smart storage management
Date Tue, 10 Jan 2017 01:43:58 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15813506#comment-15813506
] 

Wei Zhou commented on HDFS-7343:
--------------------------------

{quote}
though I'd encourage you to think about how far we can get with a stateless system (possibly
by pushing more work into the NN and DN).
{quote}
>From this words, I myself thought it's better to store these data in NN to approach the
stateless system suggested by Andrew. I did not mean that Andrew said it's better to do it
in this way. Sorry for my poor English.

> 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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