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[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, 2014-08-30, 00:01
[HDFS-6843] Create FSDataInputStream & FSDataOutputStream isEncrypted() method - HDFS - [issue]
...FileStatus should have a 'boolean isEncrypted()' method. (it was in the context of discussing with AndreW about FileStatus being a Writable).Having this method would allow MR JobSubmitter do...
http://issues.apache.org/jira/browse/HDFS-6843    Author: Charles Lamb, 2014-08-29, 23:52
[HDFS-6976] hadoop_verify_secure_prereq's results aren't checked in bin/hdfs - HDFS - [issue]
...Just need an else + exit in the secure_service stanza....
http://issues.apache.org/jira/browse/HDFS-6976    Author: Allen Wittenauer, 2014-08-29, 23:46
[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-6376] Distcp data between two HA clusters requires another configuration - HDFS - [issue]
...User has to create a third set of configuration files for distcp when transferring data between two HA clusters.Consider the scenario in [1]. You cannot put all of the required prope...
http://issues.apache.org/jira/browse/HDFS-6376    Author: Dave Marion, 2014-08-29, 22:50
[HDFS-6978] Directory scanner should correctly reconcile blocks on RAM disk - HDFS - [issue]
...It used to be very unlikely that the directory scanner encountered two replicas of the same block on different volumes.With memory storage, it is very likely to hit this with the following s...
http://issues.apache.org/jira/browse/HDFS-6978    Author: Arpit Agarwal, 2014-08-29, 22:44
[HDFS-6840] Clients are always sent to the same datanode when read is off rack - HDFS - [issue]
...After HDFS-6268 the sorting order of block locations is deterministic for a given block and locality level (e.g.: local, rack. off-rack), so off-rack clients all see the same datanode for th...
http://issues.apache.org/jira/browse/HDFS-6840    Author: Jason Lowe, 2014-08-29, 22:31
[HDFS-6958] Fix the condition of reporting failures in BlockPoolSlice - HDFS - [issue]
...BlockPoolSlice#addToReplicsMap() should log the failure for the operation that deletes restart metadata file. The current code did the opposite, log the failures on succeed deletion:if (rest...
http://issues.apache.org/jira/browse/HDFS-6958    Author: Lei, 2014-08-29, 21:51
[HDFS-5114] getMaxNodesPerRack() in BlockPlacementPolicyDefault does not take decommissioning nodes into account. - HDFS - [issue]
...If a large proportion of data nodes are being decommissioned, one or more racks may not be writable. However this is not taken into account when the default block placement policy module inv...
http://issues.apache.org/jira/browse/HDFS-5114    Author: Kihwal Lee, 2014-08-29, 21:12
[HDFS-6865] Byte array native checksumming on client side (HDFS changes) - HDFS - [issue]
...Refactor FSOutputSummer to buffer data and use the native checksum calculation functionality introduced in HADOOP-10975....
http://issues.apache.org/jira/browse/HDFS-6865    Author: James Thomas, 2014-08-29, 17:37
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