[Beowulf] Lustre Upgrades

[Jeff Johnson]

You're running 2.10.4 clients against 2.5.34 servers? I believe there are
notable lnet attrs that don't exist in 2.5.34. Maybe a Whamcloud wiz might
chime in but I think that version mismatch might be problematic.

You can do a testbed upgrade to test taking a ldiskfs volume from 2.5.34 to
2.10.4, just to be conservative.

--Jeff


On Mon, Jul 23, 2018 at 10:05 AM, Paul Edmon <pedmon at cfa.harvard.edu> wrote:

> My apologies I meant 2.5.34 not 2.6.34.  We'd like to get up to 2.10.4
> which is what our clients are running.  Recently we upgraded our cluster to
> CentOS7 which necessitated the client upgrade.  Our storage servers though
> stayed behind on 2.5.34.
>
> -Paul Edmon-
>
> On 07/23/2018 01:00 PM, Jeff Johnson wrote:
>
> Paul,
>
> 2.6.34 is a kernel version. What version of Lustre are you at now? Some
> updates are easier than others.
>
> --Jeff
>
> On Mon, Jul 23, 2018 at 8:59 AM, Paul Edmon <pedmon at cfa.harvard.edu>
> wrote:
>
>> We have some old large scale Lustre installs that are running 2.6.34 and
>> we want to get these up to the latest version of Lustre.  I was curious if
>> people in this group have any experience with doing this and if they could
>> share them.  How do you handle upgrades like this?  How much time does it
>> take?  What are the pitfalls?  How do you manage it with minimal customer
>> interruption? Should we just write off upgrading and stand up new servers
>> that are on the correct version (in which case we need to transfer the
>> several PB's worth of data over to the new system)?
>>
>> Thanks for your wisdom.
>>
>> -Paul Edmon-
>>
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>
>
> --
> ------------------------------
> Jeff Johnson
> Co-Founder
> Aeon Computing
>
> jeff.johnson at aeoncomputing.com
> www.aeoncomputing.com
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>
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-- 
------------------------------
Jeff Johnson
Co-Founder
Aeon Computing

jeff.johnson at aeoncomputing.com
www.aeoncomputing.com
t: 858-412-3810 x1001   f: 858-412-3845
m: 619-204-9061

4170 Morena Boulevard, Suite C - San Diego, CA 92117

High-Performance Computing / Lustre Filesystems / Scale-out Storage
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