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https://issues.apache.org/jira/browse/HDFS-8248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14716092#comment-14716092
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Hudson commented on HDFS-8248:
------------------------------
SUCCESS: Integrated in Hadoop-Mapreduce-trunk-Java8 #308 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Java8/308/])
HDFS-8248. Store INodeId instead of the INodeFile object in
BlockInfoContiguous. Contributed by Haohui Mai. (wheat9: rev
4cbbfa2220e884e91bf18ad1cc2f3b11f895f8c9)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlocksMap.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestCommitBlockSynchronization.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/Namesystem.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFile.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockInfo.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeId.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestReplicationPolicy.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFsck.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotDeletion.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockCollection.java
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockInfo.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/snapshot/TestSnapshotBlocksMap.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DecommissionManager.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/SequentialBlockIdGenerator.java
> Store INodeId instead of the INodeFile object in BlockInfoContiguous
> --------------------------------------------------------------------
>
> Key: HDFS-8248
> URL: https://issues.apache.org/jira/browse/HDFS-8248
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Fix For: 2.8.0
>
> Attachments: HDFS-8248.000.patch, HDFS-8248.001.patch,
> HDFS-8248.002.patch, HDFS-8248.003.patch, HDFS-8248.004.patch,
> HDFS-8248.005.patch, HDFS-8248.006.patch, HDFS-8248.007.patch,
> HDFS-8248.008.patch
>
>
> Currently the namespace and the block manager are tightly coupled together.
> There are two couplings in terms of implementation:
> 1. The {{BlockInfoContiguous}} stores a reference of the {{INodeFile}} that
> owns the block, so that the block manager can look up the corresponding file
> when replicating blocks, recovering from pipeline failures, etc.
> 1. The {{INodeFile}} stores {{BlockInfoContiguous}} objects that the file
> owns.
> Decoupling the namespace and the block manager allows the BM to be separated
> out from the Java heap or even as a standalone process. This jira proposes to
> remove the first coupling by storing the id of the inode instead of the
> object reference of {{INodeFile}} in the {{BlockInfoContiguous}} class.
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