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[HDFS-3498] Make Replica Removal Policy pluggable and ReplicaPlacementPolicyDefault extensible for reusing code in subclass - HDFS - [issue]
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...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...
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http://issues.apache.org/jira/browse/HDFS-3498
Author: Junping Du,
2013-06-13, 22:35
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[HDFS-4895] Add a function of "-fixmisplaced" to fsck for fixing blocks in mistaken placed - HDFS - [issue]
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http://issues.apache.org/jira/browse/HDFS-4895
Author: Junping Du,
2013-06-08, 01:45
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[HDFS-4885] Update verifyBlockPlacement() API in BlockPlacementPolicy - HDFS - [issue]
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...verifyBlockPlacement() has unused parameter -srcPath as its responsibility just verify single block rather than files under a specific path. Also the return value (int) does not make sense a...
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http://issues.apache.org/jira/browse/HDFS-4885
Author: Junping Du,
2013-06-07, 20:20
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[HDFS-4884] Provide a way to enforce new Block Placement Policy on existing data after switching from old one - HDFS - [issue]
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...The BlockPlacementPolicy (BPP) is extensible and already multiple instances in system: BlockPlacementPolicyDefault, BlockPlacementPolicyWithNodeGroup, BlockPlacementPolicyRAID, etc. When clu...
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http://issues.apache.org/jira/browse/HDFS-4884
Author: Junping Du,
2013-06-07, 00:25
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[HDFS-4894] Multiple Replica Placement Policies support in one HDFS cluster - HDFS - [issue]
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...We should allow multiple BPPs co-existing on the same HDFS cluster for different purpose of data and different types of application, i.e. we should allow some old, infrequently accessed data...
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http://issues.apache.org/jira/browse/HDFS-4894
Author: Junping Du,
2013-06-07, 00:24
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[HDFS-4886] Override verifyBlockPlacement() API in BlockPlacementPolicyWithNodeGroup - HDFS - [issue]
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...Each block placement policy instance should override this method, so fsck can identify illegal placement for blocks....
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http://issues.apache.org/jira/browse/HDFS-4886
Author: Junping Du,
2013-06-06, 16:30
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[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]
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...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...
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http://issues.apache.org/jira/browse/HDFS-4240
Author: Junping Du,
2013-06-03, 06:51
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[HDFS-3495] Update Balancer to support new NetworkTopology with NodeGroup - HDFS - [issue]
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...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...
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http://issues.apache.org/jira/browse/HDFS-3495
Author: Junping Du,
2013-06-03, 06:29
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[HDFS-3601] Implementation of ReplicaPlacementPolicyNodeGroup to support 4-layer network topology - HDFS - [issue]
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...A subclass of ReplicaPlacementPolicyDefault, ReplicaPlacementPolicyNodeGroup was developed along with unit tests to support the four-layer hierarchical topology.The replica placement strateg...
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http://issues.apache.org/jira/browse/HDFS-3601
Author: Junping Du,
2013-06-03, 06:00
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[HDFS-3941] Backport HDFS-3498 and HDFS3601: update replica placement policy for new added "NodeGroup" layer topology - HDFS - [issue]
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...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...
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http://issues.apache.org/jira/browse/HDFS-3941
Author: Junping Du,
2013-05-15, 06:16
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