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From "Suresh Srinivas (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDFS-7317) Rename StoragePolicy
Date Fri, 31 Oct 2014 21:27:35 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14192520#comment-14192520
] 

Suresh Srinivas edited comment on HDFS-7317 at 10/31/14 9:27 PM:
-----------------------------------------------------------------

I think there is misunderstanding here. Not sure how our discussion led to this. Can you describe
where you see "hard coded mapping to storage policy" or what you mean by that?

Btw StoragePolicy today does not map to storage types. It maps *replica placement* across
different storage types. Now one could say that it should have broader goal than just replica
placement (for example whether to erasure code). But that is a different topic than how I
understand this description.


was (Author: sureshms):
I think there is misunderstanding here. Not sure how our discussion led to this. Can you describe
where you see "hard coded mapping to storage policy"?

Btw StoragePolicy today does not map to storage types. It maps *replica placement* across
different storage types. Now one could say that it should have broader goal than just replica
placement (for example whether to erasure code). But that is a different topic than how I
understand this description.

> Rename StoragePolicy
> --------------------
>
>                 Key: HDFS-7317
>                 URL: https://issues.apache.org/jira/browse/HDFS-7317
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 2.6.0
>            Reporter: Andrew Wang
>
> As discussed on HDFS-7285, StoragePolicy might not be the best name for what StoragePolicy
currently is, which is a hardcoded mapping to a StorageType. Ideally the "policy" is what
determines the data temperature in the first place, with the temperature then mapping to the
actual StorageTypes to use.
> There were a number of suggestions presented, e.g. StorageTag, StoragePolicyTag. Let's
figure this out here.



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