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[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, 2014-12-17, 05:04
[HDFS-7481] Add ACL indicator to the "Permission Denied" exception. - HDFS - [issue]
...As mentioned in comment in HDFS-7454 add an ACL indicator similar to "ls" output....
http://issues.apache.org/jira/browse/HDFS-7481    Author: Vinayakumar B, 2014-12-10, 15:55
[HDFS-7384] 'getfacl' command and 'getAclStatus' output should be in sync - HDFS - [issue]
...getfacl command will print all the entries including basic and extended entries, mask entries and effective permissions.But, getAclStatus FileSystem API will return only extended ACL entries...
http://issues.apache.org/jira/browse/HDFS-7384    Author: Vinayakumar B, 2014-12-09, 17:28
[HDFS-7349] Support DFS command for the EC encoding - HDFS - [issue]
...Support implementation of the following commandshdfs dfs -convertToEC <path>   <path>: Converts all blocks under this path to EC form (if not already in EC form, and if...
http://issues.apache.org/jira/browse/HDFS-7349    Author: Vinayakumar B, 2014-12-08, 10:01
[HDFS-7454] Reduce memory footprint for AclEntries in NameNode - HDFS - [issue]
...HDFS-5620 indicated a GlobalAclSet containing unique AclFeature can be de-duplicated to save the memory in NameNode. However it was not implemented at that time.This Jira re-proposes same im...
http://issues.apache.org/jira/browse/HDFS-7454    Author: Vinayakumar B, 2014-12-05, 17:22
[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, 2014-12-01, 05:16
[HDFS-6114] Block Scan log rolling will never happen if blocks written continuously leading to huge size of dncp_block_verification.log.curr - HDFS - [issue]
...1. BlockPoolSliceScanner#scan() will not return until all the blocks are scanned. 2. If the blocks (with size in several MBs) to datanode are written continuously then one iteration of Block...
http://issues.apache.org/jira/browse/HDFS-6114    Author: Vinayakumar B, 2014-12-01, 03:11
[HDFS-5146] JspHelper#bestNode() doesn't handle bad datanodes correctly - HDFS - [issue]
...JspHelper#bestNode() doesn't handle correctly if the chosen datanode is down.    while (s == null) {      if (chosenNode == null) {     &nbs...
http://issues.apache.org/jira/browse/HDFS-5146    Author: Vinayakumar B, 2014-11-25, 08:03
[HDFS-7410] Support CreateFlags with append() to support hsync() for appending streams - HDFS - [issue]
...Current FileSystem APIs include CreateFlag only for the create() api, and some of these (SYNC_BLOCK) are for only client side and will not be stored in metadata of the file. So append() oper...
http://issues.apache.org/jira/browse/HDFS-7410    Author: Vinayakumar B, 2014-11-25, 06:25
Clarification related to ACL with setPermission - HDFS - [mail # dev]
...Hi,Here is the scenario.1. owner : *user1, *ownerGroup: *group1**2. /dir *have permissions set 700 (rwx------) using setPermission().3. Now another Named group ACL has been set to allow acce...
   Author: Vinayakumar B, 2014-11-11, 18:28
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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