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Posted to hdfs-issues@hadoop.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2012/12/01 11:50:05 UTC
[jira] [Commented] (HDFS-4213) When the client calls hsync, allows
the client to update the file length in the NameNode
[ https://issues.apache.org/jira/browse/HDFS-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13507928#comment-13507928 ]
Hudson commented on HDFS-4213:
------------------------------
Integrated in Hadoop-Yarn-trunk #53 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/53/])
HDFS-4213. Add an API to hsync for updating the last block length at the namenode. Contributed by Jing Zhao (Revision 1415799)
Result = SUCCESS
szetszwo : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1415799
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSOutputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/client/HdfsDataOutputStream.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/ClientProtocol.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolServerSideTranslatorPB.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolTranslatorPB.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFileUnderConstruction.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/ClientNamenodeProtocol.proto
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestHFlush.java
> When the client calls hsync, allows the client to update the file length in the NameNode
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-4213
> URL: https://issues.apache.org/jira/browse/HDFS-4213
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: hdfs-client, namenode
> Reporter: Jing Zhao
> Assignee: Jing Zhao
> Fix For: 2.0.3-alpha
>
> Attachments: HDFS-4213.001.patch, HDFS-4213.002.patch, HDFS-4213.003.patch, HDFS-4213.004.patch, HDFS-4213.005.patch, HDFS-4213.006.patch, HDFS-4213.007.patch, HDFS-4213.008.patch
>
>
> As per discussion in HDFS-3960 and HDFS-2802, when clients that need strong consistency update the file length at the NameNode, a special sync/flush is required for getting the length of the being written files when snapshots are taken for these files. This jira implements this sync-with-updating-length by 1) calling ClientProtocol#fsync(), and 2) adding a new field to ClientProtocol#fsync() to indicate the length information.
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