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From "Larry McCay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10750) KMSKeyProviderCache should be in hadoop-common
Date Thu, 26 Jun 2014 15:48:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14044776#comment-14044776
] 

Larry McCay commented on HADOOP-10750:
--------------------------------------

Interesting...

I have a couple high-level comments/questions:

1. if this is a generic cache provider then it would make sense to remove the KMS part of
the name and any dependencies within - if there are any.
2. I'm not sure that I can envision the typical usage pattern for it. In order for the cache
to be meaningful it would have to be used across many access attempts. This means that it
would need to be an instance of the cache provider (or a backend store of some sort) that
lives across multiple usages. I can easily see how it can be used in a server type environment
such as KMS but for general use it isn't quite as clear. Can you describe the general use
that you have in mind?

> KMSKeyProviderCache should be in hadoop-common
> ----------------------------------------------
>
>                 Key: HADOOP-10750
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10750
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>    Affects Versions: 3.0.0
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>
> KMS has {{KMSCacheKeyProvider}}, this class should be available in hadoop-common for
users of  {{KeyProvider}} instances to wrap them and avoid several, potentially expensive,
key retrievals.



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