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[HDFS-5479] Fix test failures in Balancer. - HDFS - [issue]
...Many tests failures w.r.t balancer as https://builds.apache.org/job/PreCommit-HDFS-Build/5360/#showFailuresLink shows....
http://issues.apache.org/jira/browse/HDFS-5479    Author: Junping Du, 2013-11-08, 23:35
[HDFS-5435] File append fails to initialize storageIDs - HDFS - [issue]
...Several NPE exceptions in append related operations is because forget setting storageIDs in initiate DataStreamer....
http://issues.apache.org/jira/browse/HDFS-5435    Author: Junping Du, 2013-10-28, 19:48
[HDFS-5426] Fix NPE in PBHelper - HDFS - [issue]
...According to https://builds.apache.org/job/PreCommit-HDFS-Build/5268/testReport/, 6 test failures in TestPBHelper due to NPE issues if not setting storageIDs before....
http://issues.apache.org/jira/browse/HDFS-5426    Author: Junping Du, 2013-10-25, 18:19
[HDFS-4885] Update verifyBlockPlacement() API in BlockPlacementPolicy - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-4885    Author: Junping Du, 2013-10-22, 14:50
[HDFS-4894] Multiple Replica Placement Policies support in one HDFS cluster - HDFS - [issue]
...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...
http://issues.apache.org/jira/browse/HDFS-4894    Author: Junping Du, 2013-10-11, 04:13
[HDFS-5208] Only clear network location cache on specific nodes if invalid NetworkTopology happens - HDFS - [issue]
...After HDFS-4521, once a DN is registered with invalid networktopology, all cached rack info in DNSToSwitchMapping will be cleared. We should only clear cache on specific nodes....
http://issues.apache.org/jira/browse/HDFS-5208    Author: Junping Du, 2013-09-26, 01:03
[HDFS-5237] Get rid of nodes' registration names - HDFS - [issue]
...Per discussion in HDFS-5208 and may be some other discussions before, Node's registration name is pretty confusing and shouldn't be used in production environment as topology resolving issue...
http://issues.apache.org/jira/browse/HDFS-5237    Author: Junping Du, 2013-09-24, 18:58
[HDFS-5254] Reconfigure DN's topology without restart DN - HDFS - [issue]
...In some cases (like: VM live migration in virtualization or SDN in cloud), the DN's network topology is changed in runtime. We should figure out some way to reconfigure it without stop/start...
http://issues.apache.org/jira/browse/HDFS-5254    Author: Junping Du, 2013-09-24, 08:36
[HDFS-5155] Deprecate API of getStorageID() and setStorageID() in DatanodeID as multiple storages - HDFS - [issue]
...StorageID is an unique number that associates the Datanodes blocks with a particular Datanode. To enable heterogeneous storage, we are supporting multiple storageIDs per DN, so previous APIs...
http://issues.apache.org/jira/browse/HDFS-5155    Author: Junping Du, 2013-09-20, 23:43
[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
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