[cdwg] Lustre 2.5.0 released

[Jones, Peter A]

We are pleased to announce that the Lustre 2.5.0 Release has been declared GA and is available for download<http://downloads.whamcloud.com/public/lustre/latest-feature-release/> . You can also grab the source from git<http://git.whamcloud.com/?p=fs/lustre-release.git;a=commit;h=be39b2aa4bf1469db0c936d1415301dca3a1effc>

The major release includes a number of new features including:

Hierarchal Storage Management (HSM) (LU-<https://jira.hpdd.intel.com/browse/LU-3608>3608<https://jira.hpdd.intel.com/browse/LU-3608>) – allows data to be transferred between different storage types
Extended Attribute Cache (Xattr Cache) (LU-2869<https://jira.hpdd.intel.com/browse/LU-2869>) - improved performance when reading extended attributes

Fuller details can be found in the change log<https://wiki.hpdd.intel.com/display/PUB/Changelog+2.5>, the scope statement<https://wiki.hpdd.intel.com/display/PUB/Lustre+2.5+Scope+Statement> <https://wiki.hpdd.intel.com/display/PUB/Lustre+2.5+Scope+Statement> and the test matrix<https://wiki.hpdd.intel.com/display/PUB/Lustre+2.5> <https://wiki.hpdd.intel.com/display/PUB/Lustre+2.5>

The following is a known issues in the Lustre 2.5.0 Release:

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-4152<https://jira.hpdd.intel.com/browse/LU-4152>: Under rare access patterns while re-exporting NFS it is possible that MDT threads might block until external action is performed on a file
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 and it is likely that these will be addressed in the 2.5.1 release scheduled for Q1 2014.

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

We would like to thank OpenSFS<http://www.opensfs.org/> for their contributions towards the cost of the release and also to all Lustre community members who have contributed to the release with code and/or testing.