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[HDFS-6927] Add unit tests - HDFS - [issue]
...Add a bunch of unit tests to cover flag persistence, propagation to DN, ability to write replicas to RAM disk, lazy writes to disk and eviction from RAM disk....
http://issues.apache.org/jira/browse/HDFS-6927    Author: Arpit Agarwal, 2014-08-27, 23:52
[HDFS-6923] Propagate LazyPersist flag to DNs via DataTransferProtocol - HDFS - [issue]
...If the LazyPersist flag is set in the file properties, the DFSClient will propagate it to the DataNode via DataTransferProtocol....
http://issues.apache.org/jira/browse/HDFS-6923    Author: Arpit Agarwal, 2014-08-27, 23:34
[HDFS-6922] Add LazyPersist flag to INodeFile, save it in FsImage and edit logs - HDFS - [issue]
...Support for saving the LazyPersist flag in the FsImage and edit logs....
http://issues.apache.org/jira/browse/HDFS-6922    Author: Arpit Agarwal, 2014-08-27, 23:33
[HDFS-6955] DN should reserve disk space for a full block when creating tmp files - HDFS - [issue]
...HDFS-6898 is introducing disk space reservation for RBW files to avoid running out of disk space midway through block creation.This Jira is to introduce similar reservation for tmp files....
http://issues.apache.org/jira/browse/HDFS-6955    Author: Arpit Agarwal, 2014-08-27, 21:08
[HDFS-6921] Add LazyPersist flag to FileStatus - HDFS - [issue]
...A new flag will be added to FileStatus to indicate that a file can be lazily persisted to disk i.e. trading reduced durability for better write performance....
http://issues.apache.org/jira/browse/HDFS-6921    Author: Arpit Agarwal, 2014-08-27, 16:55
[HDFS-6936] The HttpFSFileSystem should also return the isLazyPersist flag in the FileStatus - HDFS - [issue]
...Per code review from Jitendra Nath Pandey on HDFS-6921, the HttpFSFileSystem should also return the isLazyPersist flag in the FileStatus....
http://issues.apache.org/jira/browse/HDFS-6936    Author: Arpit Agarwal, 2014-08-27, 16:55
Re: Updates on migration to git - HDFS - [mail # dev]
...I cloned the new repo, built trunk and branch-2, verified all the branchesare present. Also checked a few branches and the recent commit historymatches our existing repo. Everything looks go...
   Author: Arpit Agarwal, 2014-08-26, 22:29
[HDFS-6900] Eliminate DU thread per block pool slice - HDFS - [issue]
...We use one DU thread per block pool slice to compute disk usage information. In addition to the thread overhead this results in the disk usage information being out of date for up to 10 minu...
http://issues.apache.org/jira/browse/HDFS-6900    Author: Arpit Agarwal, 2014-08-26, 00:16
[HDFS-6581] Write to single replica in memory - HDFS - [issue]
...Per discussion with the community on HDFS-5851, we will implement writing to a single replica in DN memory via DataTransferProtocol.This avoids some of the issues with short-circuit writes, ...
http://issues.apache.org/jira/browse/HDFS-6581    Author: Arpit Agarwal, 2014-08-26, 00:01
[HDFS-6933] Skip checksum verification when reading from memory - HDFS - [issue]
...Checksum verification can be skipped when reading from replicas on local RAM disk....
http://issues.apache.org/jira/browse/HDFS-6933    Author: Arpit Agarwal, 2014-08-25, 11:49
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