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[HDFS-7252] small refinement to the use of isInAnEZ in FSNamesystem - HDFS - [issue]
...In FSN#startFileInt, EncryptionZoneManager#getEncryptionZoneForPath is invoked 3 times (dir.isInAnEZ(iip), dir.getEZForPath(iip), dir.getKeyName(iip)) in following code, actually we just nee...
http://issues.apache.org/jira/browse/HDFS-7252    Author: Yi Liu, 2014-10-18, 14:58
[HDFS-6995] Block should be placed in the client's 'rack-local' node if 'client-local' node is not available - HDFS - [issue]
...HDFS cluster is rack aware.Client is in different node than of datanode,but Same rack contains one or more datanodes.In this case first preference should be given to select 'rack-local' node...
http://issues.apache.org/jira/browse/HDFS-6995    Author: Vinayakumar B, 2014-10-18, 14:58
[HDFS-7242] Code improvement for FSN#checkUnreadableBySuperuser - HDFS - [issue]
...checkUnreadableBySuperuser is to check whether super user can access specific path. The code logic is not efficient. It does iteration check for all user, actually we just need to check supe...
http://issues.apache.org/jira/browse/HDFS-7242    Author: Yi Liu, 2014-10-18, 14:58
[HDFS-7112] LazyWriter should use either async IO or one thread per physical disk - HDFS - [issue]
...The LazyWriter currently uses synchronous IO and a single thread. This limits the throughput to that of a single disk. Using either async overlapped IO or one thread per physical disk will i...
http://issues.apache.org/jira/browse/HDFS-7112    Author: Arpit Agarwal, 2014-10-18, 03:05
[HDFS-7090] Use unbuffered writes when persisting in-memory replicas - HDFS - [issue]
...The LazyWriter thread just uses FileUtils.copyFile to copy block files to persistent storage. It would be better to use unbuffered writes to avoid churning page cache....
http://issues.apache.org/jira/browse/HDFS-7090    Author: Arpit Agarwal, 2014-10-18, 03:04
[HDFS-7171] Fix Jenkins failures in HDFS-6581 branch - HDFS - [issue]
...Jenkins flagged a few failures with the latest merge patch.Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/8269//testReport/Findbugs warnings: https://builds.apache.org/job/...
http://issues.apache.org/jira/browse/HDFS-7171    Author: Arpit Agarwal, 2014-10-18, 03:04
[HDFS-7129] Metrics to track usage of memory for writes - HDFS - [issue]
...A few metrics to evaluate feature usage and suggest improvements. Thanks to Suresh Srinivas for some of these suggestions. Number of times a block in memory was read (before being ejected) A...
http://issues.apache.org/jira/browse/HDFS-7129    Author: Arpit Agarwal, 2014-10-18, 03:03
[HDFS-7159] Use block storage policy to set lazy persist preference - HDFS - [issue]
...Now that HDFS-6584 feature is ready and supports block storage policies on both files and directories, we can make use of Storage Policies to store the LAZY_PERSIST preference.This only affe...
http://issues.apache.org/jira/browse/HDFS-7159    Author: Arpit Agarwal, 2014-10-18, 03:03
[HDFS-7155] Bugfix in createLocatedFileStatus caused by bad merge - HDFS - [issue]
...FsDirectory.createLocatedFileStatus fails to initialize the blockSize.Likely caused by a bad merge....
http://issues.apache.org/jira/browse/HDFS-7155    Author: Arpit Agarwal, 2014-10-18, 03:02
[HDFS-7144] Fix findbugs warnings in RamDiskReplicaTracker - HDFS - [issue]
...Two more findbugs warnings: Bad practice Warningsorg.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskReplicaTracker$RamDiskReplica.deleteSavedFiles() ignores exceptional return valu...
http://issues.apache.org/jira/browse/HDFS-7144    Author: Tsz Wo Nicholas Sze, 2014-10-18, 03:01
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