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[HDFS-279] Generation stamp value should be validated when creating a Block - HDFS - [issue]
...In hdfs, generation stamps < GenerationStamp.FIRST_VALID_STAMP are reserved values but not valid generation stamps.  Incorrect uses of the reserved values may cause unexpected behavi...
http://issues.apache.org/jira/browse/HDFS-279    Author: Tsz Wo Nicholas Sze, 2014-07-22, 02:13
[HDFS-313] Threads in servers should not die silently. - HDFS - [issue]
...If there is an uncaught exception, some threads in a server may die silently. The corresponding error message does not show up in the log....
http://issues.apache.org/jira/browse/HDFS-313    Author: Tsz Wo Nicholas Sze, 2014-07-21, 18:52
[HDFS-6710] Archival Storage: Consider block storage policy in replica deletion - HDFS - [issue]
...Replica deletion should be modified in a way that the deletion won't break the block storage policy....
http://issues.apache.org/jira/browse/HDFS-6710    Author: Tsz Wo Nicholas Sze, 2014-07-21, 14:39
[HDFS-6679] Archival Storage: Bump NameNodeLayoutVersion and update editsStored test files - HDFS - [issue]
...HDFS-6677 changed fsimage for storing storage policy IDs.  We should bump the NameNodeLayoutVersion and as well fix the tests....
http://issues.apache.org/jira/browse/HDFS-6679    Author: Tsz Wo Nicholas Sze, 2014-07-21, 14:38
[HDFS-283] Improve datanode decommission monitoring performance - HDFS - [issue]
...The datanode decommission monitoring is not efficient.  There are rooms for improvement....
http://issues.apache.org/jira/browse/HDFS-283    Author: Tsz Wo Nicholas Sze, 2014-07-19, 01:18
[HDFS-328] "fs -setrep" should have better error message - HDFS - [issue]
...When the replication # is larger than dfs.replication.max (defined in conf), "fs -setrep" shows a meaningless error message.  For example,//dfs.replication.max is 512$ hadoop fs -setrep...
http://issues.apache.org/jira/browse/HDFS-328    Author: Tsz Wo Nicholas Sze, 2014-07-18, 21:14
[HDFS-6671] Archival Storage: Consider block storage policy in replicaiton - HDFS - [issue]
...In order to satisfy storage policy requirement, replication monitor in addition reads storage policy information from INodeFile when performing replication.  As before, it only adds rep...
http://issues.apache.org/jira/browse/HDFS-6671    Author: Tsz Wo Nicholas Sze, 2014-07-17, 12:57
[HDFS-5464] Simplify block report diff calculation - HDFS - [issue]
...The current calculation in BlockManager.reportDiff(..) is unnecessarily complicated.  We could simplify the calculation....
http://issues.apache.org/jira/browse/HDFS-5464    Author: Tsz Wo Nicholas Sze, 2014-07-16, 01:42
[HDFS-5284] Flatten INode hierarchy - HDFS - [issue]
...Currently, we have a complicated inode hierarchy for representing different states of a file or a directory.  For example,  when a file is being created, it is represented by an IN...
http://issues.apache.org/jira/browse/HDFS-5284    Author: Tsz Wo Nicholas Sze, 2014-07-15, 22:50
[HDFS-6670] Archival Storage: Add block storage policy - HDFS - [issue]
...Support block storage policy such as the table below.IDPolicy Name  File creation  Fallback storage for creation  Fallback storage for replication 12 Hot  All DISK &...
http://issues.apache.org/jira/browse/HDFS-6670    Author: Tsz Wo Nicholas Sze, 2014-07-14, 22:11
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