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https://issues.apache.org/jira/browse/HDFS-5121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HDFS-5121:
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Attachment: HDFS-5121-caching.001.patch
* add and implement RPCs for creating/modifying and deleting pools.
* add CachePoolInfo, which is a client-side representation of pool state.
CachePool is the server-side representation of this state, and will eventually
have more fields that aren't important to the client. Also, CachePool cannot
contain null fields.
* add the retry cache glue code needed for the earlier path directive RPCs, as
well as for these new RPCs. This is only required for the AtMostOnce RPCs--
idempotent ones are unaffected.
* enforce pool permissions (i.e., user+group+mode) when adding or removing path
cache directives. (In contrast, creating, modifying or deleting pools can only
be done by the superuser).
* fix unit test failure in TestPathCacheRequests -- inverted conditional in
DFSUtil.isPathValid.
* I noticed that the {{RemoteIterators}} I was creating in the patch looked a
lot like the ones I had created earlier, so I pushed the common code into
{{BatchedRemoteIterator}}.
> add RPCs for creating and manipulating cache pools
> --------------------------------------------------
>
> Key: HDFS-5121
> URL: https://issues.apache.org/jira/browse/HDFS-5121
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Affects Versions: HDFS-4949
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-5121-caching.001.patch
>
>
> We should add RPCs for creating and manipulating cache pools.
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