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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10530) BlockManager reconstruction work scheduling should correctly adhere to EC block placement policy
Date Thu, 16 Mar 2017 22:32:42 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15929054#comment-15929054
] 

Hudson commented on HDFS-10530:
-------------------------------

SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11417 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/11417/])
HDFS-10530. BlockManager reconstruction work scheduling should correctly (wang: rev 4812518b23cac496ab5cdad5258773bcd9728770)
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockManager.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java


> BlockManager reconstruction work scheduling should correctly adhere to EC block placement
policy
> ------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-10530
>                 URL: https://issues.apache.org/jira/browse/HDFS-10530
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>            Reporter: Rui Gao
>            Assignee: Manoj Govindassamy
>              Labels: hdfs-ec-3.0-nice-to-have
>             Fix For: 3.0.0-alpha3
>
>         Attachments: HDFS-10530.1.patch, HDFS-10530.2.patch, HDFS-10530.3.patch, HDFS-10530.4.patch,
HDFS-10530.5.patch
>
>
> This issue was found by [~tfukudom].
> Under RS-DEFAULT-6-3-64k EC policy, 
> 1. Create an EC file, the file was witten to all the 5 racks( 2 dns for each) of the
cluster.
> 2. Reconstruction work would be scheduled if the 6th rack is added. 
> 3. While adding the 7th rack or more racks will not trigger reconstruction work. 
> Based on default EC block placement policy defined in “BlockPlacementPolicyRackFaultTolerant.java”,
EC file should be able to be scheduled to distribute to 9 racks if possible.
> In *BlockManager#isPlacementPolicySatisfied(BlockInfo storedBlock)* , *numReplicas* of
striped blocks might should be *getRealTotalBlockNum()*, instead of *getRealDataBlockNum()*.



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