[Lustre-discuss] Lustre 2.x support on vanilla kernels

Cory Spitz spitzcor at cray.com
Wed Jun 6 21:23:18 PDT 2012

FYI: Cray plans to deploy 2.2 at year's end and therefore we'll treat it 
as our maintenance branch.  It is true that not much has landed to b2_2 
since 2.2 was released, but Cray will be pushing patches to it including 
some that have already landed to b2_1 for 2.1.x.  It is our hope that we 
can catch it up and b2_2 will be a stable branch for others to use in 
production as Cray will.  We have not yet begun the push process but 
expect to begin shortly.  ORNL, I believe, has similar plans and James 
Simmons has already starting posting patches to b2_2 for review.


On 6/6/2012 6:08 PM, Andreas Dilger wrote:
> On Thu, 7 Jun 2012 01:55:35 +0400 Andrew Savchenko wrote:
>> On Wed, 6 Jun 2012 10:01:22 -0600 Andreas Dilger wrote:
>>> Note that Lustre 2.2 is not yet designated a maintenance release, so will not necessarily be getting fixes and updated releases. If this is for a production system, and you are not prepared to be making your own updates, you should stick with 2.1.x.
>>> The 2.1.2 release is imminent, but for now 2.1.1 is the latest maintenance release.
>> We're planning to use Lustre for production purposes in about half a
>> year. Until then it will be used for testing and to create client
>> packages and related build system parts.
>> So if 2.2 branch will be eventually put to maintenance, half a year
>> looks like a good time. If it may never become a maintained branch,
>> then I'll stick with 2.1 branch.
> Currently there is no plan to move away from 2.1.x as the maintenance branch.  The next long-term maintenance branch may not be until 2.3 or 2.4, but this will be decided in the future.  We definitely do not want to discourage testing and usage of Lustre 2.2 for experienced users that are already expecting to be doing maintenance themselves, but it has not been getting fixes for known issues that are landing on master and 2.1.x.
> Cheers, Andreas
> --
> Andreas Dilger                       Whamcloud, Inc.
> Principal Lustre Engineer            http://www.whamcloud.com/
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