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[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-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 In addition to the thread overhead this results in the disk usage information being out of date for up to 10 minu...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-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
[HDFS-6910] Initial prototype implementation for replicas in memory using tmpfs - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-6910    Author: Arpit Agarwal, 2014-08-23, 22:13
[HDFS-6918] Investigate eviction from RAM disk via file truncation - HDFS - [issue]
...We proposed evicting blocks from RAM disk by just deleting the file. Assuming the client completes its read quickly the block will be deleted when the client closes its handle.Colin Patrick ...
http://issues.apache.org/jira/browse/HDFS-6918    Author: Arpit Agarwal, 2014-08-23, 21:58
[HDFS-6899] Allow changing MiniDFSCluster volumes per DN and capacity per volume - HDFS - [issue]
...MiniDFSCluster hardcodes the number of directories per volume to two. Propose removing the hard-coded restriction.It would be useful to limit the capacity of individual storage directories f...
http://issues.apache.org/jira/browse/HDFS-6899    Author: Arpit Agarwal, 2014-08-23, 16:07
[HDFS-5851] Support memory as a storage medium - HDFS - [issue]
...Memory can be used as a storage medium for smaller/transient files for fast write throughput.More information/design will be added later....
http://issues.apache.org/jira/browse/HDFS-5851    Author: Arpit Agarwal, 2014-08-23, 06:45
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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