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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7343) HDFS smart storage management
Date Fri, 24 Mar 2017 08:26:41 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15939992#comment-15939992
] 

Anoop Sam John commented on HDFS-7343:
--------------------------------------

Tracking of data hotness and movement is at what level?  Block level? Or only file level?
HBase, being a user, we will compact our HFiles into one (major compaction) and if the tracking
is at file level, it might not be that useful for HBase.  Just saying

> 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: HDFSSmartStorageManagement-General-20170315.pdf, HDFS-Smart-Storage-Management.pdf,
HDFSSmartStorageManagement-Phase1-20170315.pdf, HDFS-Smart-Storage-Management-update.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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