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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, 2014-12-23, 15:31
[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-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-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
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
[HDFS-7368] Support HDFS specific 'shell' on command 'hdfs dfs' invocation - HDFS - [issue]
...hadoop fs is the generic implementation for all filesystem implementations, but some of the operations are supported only in some filesystems. Ex: snapshot commands, acl commands, xattr comm...
http://issues.apache.org/jira/browse/HDFS-7368    Author: Vinayakumar B, 2014-11-06, 13:27
Why Mover moves only one replica in one iteration ? - HDFS - [mail # dev]
...Hi,Why we cant schedule all replica's movement together in one iteration.?I have seen while executing test, it needs one iteration to schedulemovement of each replica of a block from one sto...
   Author: Vinayakumar B, 2014-10-31, 14:33
[HDFS-6995] Block should be placed in the client's 'rack-local' node if 'client-local' node is not available - HDFS - [issue]
...HDFS cluster is rack aware.Client is in different node than of datanode,but Same rack contains one or more datanodes.In this case first preference should be given to select 'rack-local' node...
http://issues.apache.org/jira/browse/HDFS-6995    Author: Vinayakumar B, 2014-10-28, 04:39
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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