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https://issues.apache.org/jira/browse/HDFS-13655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16567288#comment-16567288
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Íñigo Goiri commented on HDFS-13655:
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[~xiaochen], I already implemented those three methods.
However, the state is different for each, let me go over:
* safemode: this one is working and I tested it. We use it in production and so
far no issues.
* saveNamespace: this one is implemented and I tested it by hand and it seems
to trigger the fsimage saving. We internally don't use it that much so it could
have some bugs.
* rollingUpgrade: same as saveNamespace, it is implemented but as we don't use
it that much, I'm not sure if it covers all the cases.
> RBF: Add missing ClientProtocol APIs to RBF
> -------------------------------------------
>
> Key: HDFS-13655
> URL: https://issues.apache.org/jira/browse/HDFS-13655
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Xiao Chen
> Priority: Major
>
> As
> [discussed|https://issues.apache.org/jira/browse/HDFS-12858?focusedCommentId=16500975&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16500975|#comment-16500975]
> with [~elgoiri], there are some HDFS methods that does not take path as a
> parameter. We should support these to work with federation.
> The ones missing are:
> * Snapshots
> * Storage policies
> * Encryption zones
> * Cache pools
> One way to reasonably have them to work with federation is to 'list' each
> nameservice and concat the results. This can be done pretty much the same as
> {{refreshNodes()}} and it would be a matter of querying all the subclusters
> and aggregate the output (e.g., {{getDatanodeReport()}}.)
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