[cdwg] Lustre 2.5.1 released

[Jones, Peter A]

We are pleased to announce that the Lustre 2.5.1 Release has been declared GA and is available for download<http://downloads.whamcloud.com/public/lustre/latest-maintenance-release/> . You can also grab the source from git<http://git.whamcloud.com/?p=fs/lustre-release.git;a=commit;h=741c803c9d84291045a248c4e166a98a367dd0e4>

** IMPORTANT SECURITY UPDATE **

Sites in production on Lustre 2.5.0 are recommended to upgrade to this release immediately in order to receive the fix for LU-4703/4704 unless ACL functionality has been disabled.

***

The release highlights are

LU-4620<https://jira.hpdd.intel.com/browse/LU-4620> Support for RHEL 6.5 servers and clients
LU-4703<https://jira.hpdd.intel.com/browse/LU-4703> / LU-4704<https://jira.hpdd.intel.com/browse/LU-4704>: setxattr now checks permissions when setting ACL xattrs which prevents unauthorized alteration of ACL rules.
LU-4152<https://jira.hpdd.intel.com/browse/LU-4152>: A correction has been made to remove the risk of MDT threads blocking until external action is performed on a file while re-exporting NFS under rare access patterns

Fuller details can be found in the change log<https://wiki.hpdd.intel.com/display/PUB/Changelog+2.5>

The following are known issues in the Lustre 2.5.1 Release:

LU-4638<https://jira.hpdd.intel.com/browse/LU-4638> : There is a bug in RHEL 6.5 which results in a leak associated with attempting to hardlink files. This is expected to be fixed in an upcoming RHEL 6.5 update.
LU-3833<https://jira.hpdd.intel.com/browse/LU-3833> : HSM does not check whether a file is sparse before archiving which could lead to unexpected results
LU-4159<https://jira.hpdd.intel.com/browse/LU-4159>: Lustre 2.4.x clients  are unable to access a released file

Work is in progress for these issues.

Please log any issues found in the issue tracking system<https://jira.hpdd.intel.com/>