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From: "Gangumalla, Uma" <uma.gangumalla@intel.com>
To: "hdfs-dev@hadoop.apache.org" <hdfs-dev@hadoop.apache.org>
Subject: RE: [Vote] Merge The HDFS XAttrs Feature Branch (HDFS-2006)  to
 Trunk
Thread-Topic: [Vote] Merge The HDFS XAttrs Feature Branch (HDFS-2006)  to
 Trunk
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Date: Wed, 21 May 2014 13:08:04 +0000
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Thanks a lot for participating in this vote.

With 4  +1's( from Me, Andrew Wang, Chris and Colin) and no -1, the vote ha=
s passed for the merge.

I will do the merge shortly to trunk.

Regards,
Uma

-----Original Message-----
From: Gangumalla, Uma [mailto:uma.gangumalla@intel.com]=20
Sent: Wednesday, May 14, 2014 6:17 PM
To: hdfs-dev@hadoop.apache.org
Subject: [Vote] Merge The HDFS XAttrs Feature Branch (HDFS-2006) to Trunk

Hello HDFS Devs,
  I would like to call for a vote to merge the HDFS Extended Attributes (XA=
ttrs) feature from the HDFS-2006 branch to the trunk.
  XAttrs are already widely supported on many operating systems, including =
Linux, Windows, and Mac OS. This will allow storing attributes for HDFS fil=
e/directory.
  XAttr consist of a name and a value and exist in one of 4 namespaces: use=
r, trusted, security, and system. An XAttr name is prefixed with one of the=
se namespaces, so for example, "user.myxattr".
  Consistent with ongoing awareness of Namenode memory usage, the maximum n=
umber and size of XAttrs on a file/directory are limited by a configuration=
 parameter.
  The design document contains more details and can be found here: https://=
issues.apache.org/jira/secure/attachment/12644341/HDFS-XAttrs-Design-3.pdf
  Development of this feature has been tracked in JIRA HDFS-2006: https://i=
ssues.apache.org/jira/browse/HDFS-2006
  All of the development work for the feature is contained in the "HDFS-200=
6" branch: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-200=
6
 As last tasks, we are working to support XAttrs via libhdfs, webhdfs as we=
ll as other minor improvements.
  We intend to finish those enhancements before the vote completes and othe=
rwise we could move them to top-level JIRAs as they can be tracked independ=
ently. User document is also ready for this feature.
  Here the doc attached in JIRA:  https://issues.apache.org/jira/secure/att=
achment/12644787/ExtendedAttributes.html
 The XAttrs feature is backwards-compatible and enabled by default. A clust=
er administrator can disable it.
Testing:
 We've developed more than 70 new tests which cover the XAttrs get, set and=
 remove APIs through DistributedFileSystem and WebHdfsFileSystem, the new X=
Attr CLI commands, HA, XAttr persistence in the fsimage and related.
  Additional  testing plans are documented in: https://issues.apache.org/ji=
ra/secure/attachment/12644342/Test-Plan-for-Extended-Attributes-1.pdf
  Thanks a lot to the contributors who have helped and participated in the =
branch development.
  Code contributors are Yi Liu, Charles Lamb, Andrew Wang and Uma Maheswara=
 Rao G.
 The design document incorporates feedback from many community members: Chr=
is Nauroth, Andrew Purtell, Tianyou Li, Avik Dey, Charles Lamb, Alejandro, =
Andrew Wang, Tsz Wo Nicholas Sze and Uma Maheswara Rao G.
 Code reviewers on individual patches include Chris Nauroth, Alejandro, And=
rew Wang, Charles Lamb, Tsz Wo Nicholas Sze and Uma Maheswara Rao G.

  Also thanks to Dhruba for bringing up this JIRA and thanks to others who =
participated for discussions.
This vote will run for a week and close on 5/21/2014 at 06:16 pm IST.

Here is my +1 to start with.
Regards,
Uma
(umamahesh@apache.org<mailto:umamahesh@apache.org>)