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Re: [VOTE] Merge HDFS-6584 Archival Storage to trunk - HDFS - [mail # dev]
...+1I reviewed the feature design and have followed the development. It isready for merging into trunk.On Mon, Sep 8, 2014 at 1:03 AM, Nate Payne  wrote:CONFIDENTIALITY NOTICENOTICE: This...
   Author: Arpit Agarwal, 2014-09-09, 02:45
[HDFS-6862] Add missing timeout annotations to tests - HDFS - [issue]
...One or more tests in the following classes are missing timeout annotations. org.apache.hadoop.hdfs.server.namenode.TestValidateConfigurationSettings org.apache.hadoop.hdfs.server.namenode.ha...
http://issues.apache.org/jira/browse/HDFS-6862    Author: Arpit Agarwal, 2014-09-06, 15:06
[HDFS-6991] Notify NN of evicted block before deleting it from RAM disk - HDFS - [issue]
...When evicting a block from RAM disk to persistent storage, the DN should notify the NN of the persistent replica before deleting the replica from RAM disk. Else there can be a window of time...
http://issues.apache.org/jira/browse/HDFS-6991    Author: Arpit Agarwal, 2014-09-04, 21:28
[HDFS-6120] Fix and improve safe mode log messages - HDFS - [issue]
...In HA mode the SBN can enter safe-mode extension and stay there even after the extension period has elapsed but continue to return the safemode message stating that "The threshold has been r...
http://issues.apache.org/jira/browse/HDFS-6120    Author: Arpit Agarwal, 2014-09-04, 02:15
[HDFS-4905] Add appendToFile command to "hdfs dfs" - HDFS - [issue]
...A "hdfs dfs -appendToFile..." option would be quite useful for quick testing....
http://issues.apache.org/jira/browse/HDFS-4905    Author: Arpit Agarwal, 2014-09-04, 00:49
[HDFS-6930] Improve replica eviction from RAM disk - HDFS - [issue]
...The current replica eviction scheme is inefficient since it performs multiple file operations in the context of block allocation.A better implementation would be asynchronous eviction when f...
http://issues.apache.org/jira/browse/HDFS-6930    Author: Arpit Agarwal, 2014-09-03, 21:54
[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, 2014-09-02, 22:37
[HDFS-6975] Consider removing heavyweight synchronization for FsDataset operations - HDFS - [issue]
...Post HDFS-6482, I think we can remove the requirement for most operations to synchronize on the FsDatasetImpl object lock. Especially filesystem operations need not synchronize since block f...
http://issues.apache.org/jira/browse/HDFS-6975    Author: Arpit Agarwal, 2014-08-29, 23:29
[HDFS-6960] Bugfix in LazyWriter, fix test case and some refactoring - HDFS - [issue]
...LazyWriter has a bug. While saving the replica to disk we would save it under current/lazyPersist/. Instead it should be saved under the appropriate subdirectory e.g. current/lazyPersist/sub...
http://issues.apache.org/jira/browse/HDFS-6960    Author: Arpit Agarwal, 2014-08-29, 07:16
[HDFS-6931] Move lazily persisted replicas to finalized directory on DN startup - HDFS - [issue]
...On restart the DN should move replicas from the current/lazyPersist/ directory to current/finalized. Duplicate replicas of the same block should be deleted from RAM disk....
http://issues.apache.org/jira/browse/HDFS-6931    Author: Arpit Agarwal, 2014-08-29, 07:16
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB