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[HDFS-5986] Capture the number of blocks pending deletion on namenode webUI - HDFS - [issue]
...When a directory that has large number of directories and files are deleted, the namespace deletes the corresponding inodes immediately. However it is hard to to know when the invalidated bl...
http://issues.apache.org/jira/browse/HDFS-5986    Author: Suresh Srinivas, 2015-04-21, 18:50
[HDFS-6186] Pause deletion of blocks when the namenode starts up - HDFS - [issue]
...HDFS namenode can delete blocks very quickly, given the deletion happens as a parallel operation spread across many datanodes. One of the frequent anxieties I see is that a lot of data can b...
http://issues.apache.org/jira/browse/HDFS-6186    Author: Suresh Srinivas, 2015-04-21, 04:57
[HDFS-6353] Check and make checkpoint before stopping the NameNode - HDFS - [issue]
...One of the failure patterns I have seen is, in some rare circumstances, due to some inconsistency the secondary or standby fails to consume editlog. The only solution when this happens is to...
http://issues.apache.org/jira/browse/HDFS-6353    Author: Suresh Srinivas, 2015-03-27, 16:42
[HDFS-3689] Add support for variable length block - HDFS - [issue]
...Currently HDFS supports fixed length blocks. Supporting variable length block will allow new use cases and features to be built on top of HDFS....
http://issues.apache.org/jira/browse/HDFS-3689    Author: Suresh Srinivas, 2015-03-17, 18:20
[HDFS-6118] Code cleanup - HDFS - [issue]
...HDFS code needs cleanup related to many typos, undocumented parameters, unused methods, unnecessary cast, imports and exceptions declared as thrown to name a few.I plan on working on cleanin...
http://issues.apache.org/jira/browse/HDFS-6118    Author: Suresh Srinivas, 2015-03-14, 01:04
[HDFS-2847] NamenodeProtocol#getBlocks() should use DatanodeID as an argument instead of DatanodeInfo - HDFS - [issue]
...DatanodeID is sufficient for identifying a Datanode. DatanodeInfo has a lot of information that is not required....
http://issues.apache.org/jira/browse/HDFS-2847    Author: Suresh Srinivas, 2015-03-10, 04:59
[HDFS-3092] Enable journal protocol based editlog streaming for standby namenode - HDFS - [issue]
...Currently standby namenode relies on reading shared editlogs to stay current with the active namenode, for namespace changes. BackupNode used streaming edits from active namenode for doing t...
http://issues.apache.org/jira/browse/HDFS-3092    Author: Suresh Srinivas, 2015-03-10, 04:36
[HDFS-1832] FSNamesystem#startFileInternal unnecessarily traverses the directory multiple times - HDFS - [issue]
...FSNamesystem#startFileInternal looks up Inode for a given path multiple times. A single lookup should be sufficient....
http://issues.apache.org/jira/browse/HDFS-1832    Author: Suresh Srinivas, 2015-03-10, 01:49
[HDFS-7568] Support immutability (Write-once-read-many) in HDFS - HDFS - [issue]
...Many regulatory compliance requires storage to support WORM functionality to protect sensitive data from being modified or deleted. This jira proposes adding that feature to HDFS.See the fol...
http://issues.apache.org/jira/browse/HDFS-7568    Author: Suresh Srinivas, 2015-02-26, 19:31
[HDFS-4167] Add support for restoring/rolling back to a snapshot - HDFS - [issue]
...This jira tracks work related to restoring a directory/file to a snapshot....
http://issues.apache.org/jira/browse/HDFS-4167    Author: Suresh Srinivas, 2015-02-05, 19:21
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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