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[HDFS-5207] In BlockPlacementPolicy, update 2 parameters of chooseTarget() - HDFS - [issue]
...We should change chooseTarget(..., DatanodeDescriptor writer, ...) to chooseTarget (..., node writer, ...) as the only important property of writer is to identify other nodes' location relat...
http://issues.apache.org/jira/browse/HDFS-5207    Author: Junping Du, 2013-09-17, 14:24
[HDFS-5154] Fix several tests failure after HDFS-4987 - HDFS - [issue]
...HDFS-4987 add tracking multiple storage in NN which involve several UT failures, i.e. TestBlockManager, TestDataNodeDescriptor, etc....
http://issues.apache.org/jira/browse/HDFS-5154    Author: Junping Du, 2013-09-03, 06:51
[HDFS-3499] Make NetworkTopology support user specified topology class - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-3499    Author: Junping Du, 2013-07-02, 21:54
[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
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