[cdwg] Lustre 2.4.1 released

[Jones, Peter A]

We are pleased to announce that the Lustre 2.4.1 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=cdc7c0d0c7423a5e04926f9d72d9d4b42a29b0d3>

The release highlights are

LU-3415<https://jira.hpdd.intel.com/browse/LU-3415>: It is now possible to  upgrade from 1.8.x to 2.4.0 with quotas enabled without hitting an LBUG
<https://jira.hpdd.intel.com/browse/LU-3420>L<https://jira.hpdd.intel.com/browse/LU-3420>U-3420<https://jira.hpdd.intel.com/browse/LU-3420>: OI scrub will now be engaged after a file level backup running with DNE
<https://jira.hpdd.intel.com/browse/LU-3421>L<https://jira.hpdd.intel.com/browse/LU-3421>U-3421<https://jira.hpdd.intel.com/browse/LU-3421>: A case where OSTs might erroneously report ENOSPC has been identified and fixed
L<https://jira.hpdd.intel.com/browse/LU-3305>U-3305<https://jira.hpdd.intel.com/browse/LU-3305>: A metadata performance drop running with quotas enabled has been addressed

Fuller details can be found in the change log<https://wiki.hpdd.intel.com/display/PUB/Changelog+2.4>

The following are known issues in the Lustre 2.4.1 Release:

LU-3027<https://jira.hpdd.intel.com/browse/LU-3027>: A race condition can result in mis-reporting of file size
LU-3430<https://jira.hpdd.intel.com/browse/LU-3430> : A rare race can result in an LBUG on an OSS while running the orr policy for NRS
LU-3544<https://jira.hpdd.intel.com/browse/LU-3544>: Re-exporting Lustre over NFS from SLES11 SP2 has known issues
LU-3934<https://jira.hpdd.intel.com/browse/LU-3934>: Files created under Lustre 1.8.x could be inaccessible for a filesystem first upgraded to 2.1.x and then subsequently upgraded to 2.4.1 with a client remaining mounted. The workaround it to manually trigger an OI scrub after the upgrade.

Work is in progress for these issues.

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