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[HDFS-6111] Avoid duplicate entries in Block Scan verification logs - HDFS - [issue]
...Duplicate entries could be generated in datanode verification logs if the datanode gets shutdown during the rolling of scan verification logs.If this happens multiple times in huge cluster, ...
http://issues.apache.org/jira/browse/HDFS-6111    Author: Vinayakumar B, 2015-03-09, 08:42
[HDFS-6147] New blocks scanning will be delayed due to issue in BlockPoolSliceScanner#updateBytesToScan(..) - HDFS - [issue]
...New blocks scanning will be delayed if old blocks deleted after datanode restart.Steps:1. Write some blocks and wait till all scans over2. Restart the datanode3. Delete some of the blocks4. ...
http://issues.apache.org/jira/browse/HDFS-6147    Author: Vinayakumar B, 2015-03-09, 08:41
[HDFS-7210] Avoid two separate RPC's namenode.append() and namenode.getFileInfo() for an append call from DFSClient - HDFS - [issue]
...Currently DFSClient does 2 RPCs to namenode for an append operation.append() for re-opening the file and getting the last block, getFileInfo() Another on to get HdfsFileStateIf we can combin...
http://issues.apache.org/jira/browse/HDFS-7210    Author: Vinayakumar B, 2015-03-02, 17:02
[HDFS-7832] Show 'Last Modified' in Namenode's 'Browse Filesystem' - HDFS - [issue]
...new UI no longer shows the last modified time for a path while browsing.This could be added to make browse file system more useful....
http://issues.apache.org/jira/browse/HDFS-7832    Author: Vinayakumar B, 2015-02-26, 15:26
Re: Block creation in HDFS - HDFS - [mail # dev]
...Hi abhishek,Is Your partitions of same sizes? If yes, then you can set that as blocksize.If not you can use the latest feature.. variable block size.To verify your use case.You can close the...
   Author: Vinayakumar B, 2015-02-17, 10:25
[HDFS-7703] Support favouredNodes for the append for new blocks - HDFS - [issue]
...Currently favorNodes is supported for the new file creation, and these nodes are applicable for all blocks of the file.Same support should be available when file is opened for append.But, ev...
http://issues.apache.org/jira/browse/HDFS-7703    Author: Vinayakumar B, 2015-02-13, 05:38
[HDFS-7690] Avoid Block movement in Balancer and Mover for the erasure encoded blocks - HDFS - [issue]
...As striped design says, its would be more fault tolerant if the striped blocks reside in different nodes of different racks. But Balancer and Mover may break this by moving the encoded block...
http://issues.apache.org/jira/browse/HDFS-7690    Author: Vinayakumar B, 2015-01-29, 03:49
[HDFS-7683] Combine usages and percent stats in NameNode UI - HDFS - [issue]
...In NameNode UI, there are separate rows to display cluster usage, one is in bytes, another one is in percentage.We can combine these two rows to just display percent usage in brackets....
http://issues.apache.org/jira/browse/HDFS-7683    Author: Vinayakumar B, 2015-01-28, 15:24
[HDFS-7560] ACLs removed by removeDefaultAcl() will be back after NameNode restart/failover - HDFS - [issue]
...Default ACLs removed using removeDefaultAcl() will come back after Namenode restart/switch....
http://issues.apache.org/jira/browse/HDFS-7560    Author: Vinayakumar B, 2014-12-23, 15:31
[HDFS-7456] De-duplicate AclFeature instances with same AclEntries do reduce memory footprint of NameNode - HDFS - [issue]
...As discussed  in HDFS-7454 here, de-duplication of AclFeature helps in reducing the memory footprint of the namenode....
http://issues.apache.org/jira/browse/HDFS-7456    Author: Vinayakumar B, 2014-12-23, 15:31
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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