[lustre-discuss] 1.8 client on 3.13.0 kernel

Lewis Hyatt lhyatt at gmail.com
Tue Sep 8 11:18:43 PDT 2015

Thanks a lot for the response. Seems like we need to explore upgrading the 
servers. Do you happen to know how smooth that process is likely to be? We have 
lustre 1.8.8 on CentOS 5.4 there, I presume we need to upgrade the OS and then 
follow the upgrade procedure in the lustre manual, maybe it isn't such a big 
deal. Thanks again...


On 9/8/15 11:16 AM, Patrick Farrell wrote:
> Lewis,
> My own understanding is you are out of luck - the 1.8 client cannot realistically be brought forward to newer kernels.  Far too many changes over too long a period.
> As far as version compatibility, I believe no newer clients will talk to servers running 1.8.  If any will, they would be very early 2.x versions, which won't support your desired kernel versions anyway.
> Regards,
> Patrick
> ________________________________________
> From: lustre-discuss [lustre-discuss-bounces at lists.lustre.org] on behalf of Lewis Hyatt [lhyatt at gmail.com]
> Sent: Tuesday, September 08, 2015 9:06 AM
> To: lustre-discuss at lists.lustre.org
> Subject: [lustre-discuss] 1.8 client on 3.13.0 kernel
> Hello-
> We have a working 1.8 lustre cluster with which we are very happy. The object
> and metadata servers are running one of the recommended CentOS distributions
> (5.4), but the clients are all Ubuntu 10.04 LTS, with kernel 2.6.32. It is not
> feasible for us to change on the client side to a different distro other than
> Ubuntu, but we are about to go to Ubuntu 14, with kernel 3.13.0, for reasons
> unrelated to lustre. Unfortunately it seems that lustre 1.8 cannot be built on
> this kernel, we can't even get through the configure process without a large
> number of errors. The first one we hit is this:
> checking for /lib/modules/3.13.0-63-generic/build/include/linux/autoconf.h... no
> But various attempts to hack around the errors as they come up have not led to
> much success. Is this something we can hope to achieve? I thought I saw some
> threads about a series of patches to support this kernel in lustre 1.8 but I
> haven't been able to find anything conclusive. We are really hoping it is
> possible to upgrade our clients without touching the lustre servers, as we
> don't want to disturb that production system which has been very reliable for
> us, and we don't have much in-house expertise with lustre or CentOS. We were
> able to build a newer lustre client on the 3.13 kernel, but it seems it is not
> willing to interact with the 1.8 servers.
> Thanks for any advice, much appreciated.
> -Lewis
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