Wei Zhou commented on HDFS-7343:

Thanks all for reviewing and great comments.
I'm thinking about this and will reply in detail later. Thanks!

> 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.pdf
> 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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