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[HDFS-3498] Make Replica Removal Policy pluggable and ReplicaPlacementPolicyDefault extensible for reusing code in subclass - HDFS - [issue]
...ReplicaPlacementPolicy is already a pluggable component in Hadoop. However, the Replica Removal Policy is still nested in BlockManager that need to be separated out into a ReplicaPlacementPo...
http://issues.apache.org/jira/browse/HDFS-3498    Author: Junping Du, 2013-06-13, 22:35
[HDFS-4895] Add a function of "-fixmisplaced" to fsck for fixing blocks in mistaken placed - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-4895    Author: Junping Du, 2013-06-08, 01:45
[HDFS-4884] Provide a way to enforce new Block Placement Policy on existing data after switching from old one - HDFS - [issue]
...The BlockPlacementPolicy (BPP) is extensible and already multiple instances in system: BlockPlacementPolicyDefault, BlockPlacementPolicyWithNodeGroup, BlockPlacementPolicyRAID, etc. When clu...
http://issues.apache.org/jira/browse/HDFS-4884    Author: Junping Du, 2013-06-07, 00:25
[HDFS-4886] Override verifyBlockPlacement() API in BlockPlacementPolicyWithNodeGroup - HDFS - [issue]
...Each block placement policy instance should override this method, so fsck can identify illegal placement for blocks....
http://issues.apache.org/jira/browse/HDFS-4886    Author: Junping Du, 2013-06-06, 16:30
[HDFS-4240] In nodegroup-aware case, make sure nodes are avoided to place replica if some replica are already under the same nodegroup - HDFS - [issue]
...In previous implementation for HADOOP-8468, 3rd replica is avoid to place on the same nodegroup of 2nd replica. But it didn't provide check on nodegroup of 1st replica, so if 2nd replica's r...
http://issues.apache.org/jira/browse/HDFS-4240    Author: Junping Du, 2013-06-03, 06:51
[HDFS-3495] Update Balancer to support new NetworkTopology with NodeGroup - HDFS - [issue]
...Since the Balancer is a Hadoop Tool, it was updated to be directly aware of four-layer hierarchy instead of creating an alternative Balancer implementation. To accommodate extensibility, a n...
http://issues.apache.org/jira/browse/HDFS-3495    Author: Junping Du, 2013-06-03, 06:29
[HDFS-3601] Implementation of ReplicaPlacementPolicyNodeGroup to support 4-layer network topology - HDFS - [issue]
...A subclass of ReplicaPlacementPolicyDefault, ReplicaPlacementPolicyNodeGroup was developed along with unit tests to support the four-layer hierarchical topology.The replica placement strateg...
http://issues.apache.org/jira/browse/HDFS-3601    Author: Junping Du, 2013-06-03, 06:00
[HDFS-3941] Backport HDFS-3498 and HDFS3601: update replica placement policy for new added "NodeGroup" layer topology - HDFS - [issue]
...With enabling additional layer of "NodeGroup", the replica placement policy used in BlockPlacementPolicyWithNodeGroup is updated to following rules:0. No more than one replica is placed with...
http://issues.apache.org/jira/browse/HDFS-3941    Author: Junping Du, 2013-05-15, 06:16
[HDFS-4282] TestEditLog.testFuzzSequences FAILED in all pre-commit test - HDFS - [issue]
...Caught non-IOException throwable java.lang.RuntimeException: java.io.IOException: Invalid UTF8 at 9871b370d70a  at org.apache.hadoop.io.UTF8.toString(UTF8.java:154)  at org.apache....
http://issues.apache.org/jira/browse/HDFS-4282    Author: Junping Du, 2013-05-03, 18:22
[HDFS-4653] 4 unit tests in TestFcHdfsSymlink failed on trunk - HDFS - [issue]
...4 Failed Tests:org.apache.hadoop.fs.TestFcHdfsSymlink.testCreateWithPartQualPathFailsorg.apache.hadoop.fs.TestFcHdfsSymlink.testCreateLinkUsingRelPathsorg.apache.hadoop.fs.TestFcHdfsSymlink....
http://issues.apache.org/jira/browse/HDFS-4653    Author: Junping Du, 2013-04-04, 00:56
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