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https://issues.apache.org/jira/browse/HDFS-11575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16199099#comment-16199099
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Hudson commented on HDFS-11575:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13061 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/13061/])
HDFS-11575. Supporting HDFS NFS gateway with Federated HDFS. Contributed
(jitendra: rev d6602b5f39833611b4afa4581552f6c4c37e23a8)
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/OpenFileCtx.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestRpcProgramNfs3.java
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hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestViewfsWithNfs3.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/Nfs3Utils.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/WriteManager.java
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hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/OpenFileCtxCache.java
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hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestWrites.java
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hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/mount/RpcProgramMountd.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestDFSClientCache.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestExportsTable.java
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hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/nfs/nfs3/FileHandle.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/RpcProgramNfs3.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestReaddir.java
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hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/WriteCtx.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-nfs/src/test/java/org/apache/hadoop/hdfs/nfs/nfs3/TestClientAccessPrivilege.java
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hadoop-common-project/hadoop-nfs/src/main/java/org/apache/hadoop/nfs/nfs3/request/WRITE3Request.java
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hadoop-hdfs-project/hadoop-hdfs-nfs/src/main/java/org/apache/hadoop/hdfs/nfs/nfs3/DFSClientCache.java
> Supporting HDFS NFS gateway with Federated HDFS
> -----------------------------------------------
>
> Key: HDFS-11575
> URL: https://issues.apache.org/jira/browse/HDFS-11575
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Reporter: Mukul Kumar Singh
> Assignee: Mukul Kumar Singh
> Fix For: 3.1.0
>
> Attachments: HDFS-11575.001.patch, HDFS-11575.002.patch,
> HDFS-11575.003.patch, HDFS-11575.004.patch, HDFS-11575.005.patch,
> HDFS-11575.006.patch, HDFS-11575.007.patch, HDFS-11575.008.patch,
> HDFS-11575.009.patch, HDFS-11575.010.patch, HDFS-11575.011.patch,
> SupportingNFSwithFederatedHDFS.pdf
>
>
> Currently HDFS NFS gateway only supports HDFS as the underlying filesystem.
> Federated HDFS with ViewFS helps in improving the scalability of the name
> nodes. However NFS is not supported with ViewFS.
> With this change, ViewFS using HDFS as the underlying filesystem can be
> exported using NFS. ViewFS mount table will be used to determine the exports
> which needs to be supported.
> Some important points
> 1) This patch only supports HDFS as the underlying filesystem for ViewFS.
> 2) This patch add support to add more than one export point in the NFS gateway
> 3) Root filesystem of the ViewFS will not be mountable for NFS gateway with
> ViewFS,
> however this will not be the case for NFS gateway with HDFS
> 4) A filehandle now apart from the field will also contain an identifier to
> identify the name node, this will be used to map to correct name node for
> file operations.
> Please find the attached pdf document which helps in explaining the design
> and the solution.
>
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