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[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-6932] Balancer and Mover tools should ignore replicas on RAM_DISK - HDFS - [issue]
...Per title, balancer and mover should just ignore replicas on RAM disk instead of attempting to move them to other nodes....
http://issues.apache.org/jira/browse/HDFS-6932    Author: Arpit Agarwal, 2014-10-18, 02:59
[HDFS-7100] Make eviction scheme pluggable - HDFS - [issue]
...We can make the eviction scheme pluggable to help evaluate multiple schemes....
http://issues.apache.org/jira/browse/HDFS-7100    Author: Arpit Agarwal, 2014-10-18, 02:57
[HDFS-7108] Fix unit test failures in SimulatedFsDataset - HDFS - [issue]
...HDFS-7100 introduced a few unit test failures due to UnsupportedOperationException in SimulatedFsDataset.getVolume....
http://issues.apache.org/jira/browse/HDFS-7108    Author: Arpit Agarwal, 2014-10-18, 02:57
[HDFS-7091] Add forwarding constructor for INodeFile for existing callers - HDFS - [issue]
...Since HDFS-6584 is in trunk we are hitting quite a few merge conflicts.Many of the conflicts can be avoided by some minor updates to the branch....
http://issues.apache.org/jira/browse/HDFS-7091    Author: Arpit Agarwal, 2014-10-18, 02:56
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