[lustre-discuss] Running an older Lustre server (2.5) with a newer client (2.11)

[Raj]

Kirill
We are running 2.11.x clients on 2.5.x servers (Neo 2.0) in TDS environment
and haven’t seen any issues yet. Plan is to put it in production in a month
or so.
We also have 2.11.x servers(Neo 3.1-022). I am will be very keen to test
PFL  in a mix env of 2.7 and 2.11 clients. If anybody has tested this,
please let me know.

Thanks
-Raj
On Friday, August 30, 2019, Leonardo Saavedra <lsaavedr at nrao.edu> wrote:

> On 8/29/19 5:00 PM, Kirill Lozinskiy wrote:
>
> Hey Lustre fans!
>
> Is there anyone out there running Lustre server version 2.5.x with a
> Lustre client version 2.11.x? I'm curious if you are running this
> combination and whether or not you saw and gains or losses when you went to
> the newer Lustre client.
>
> We were running Lustre 2.7 client before and just recently went to 2.11.
> I'm trying to get a better understanding as to how common it is to have the
> version drift between the server and the client, as well as any positive or
> negative experiences.
>
> it works, no problem at all, in your client's logs you'll see a message
> like:
>
> ---
> [60010.976717] Lustre: Lustre: Build Version: 2.10.4
> [60011.029258] LNet: Added LNI 10.64.102.152 at tcp [8/256/0/180]
> [60011.029297] LNet: Accept secure, port 988
> [60011.042970] Lustre: Server MGS version (2.5.5.0) is much older than
> client. Consider upgrading server (2.10.4)
> ---
>
>
> --
> Leo Saavedra
> National Radio Astronomy Observatorywww.nrao.edu
> +1-575-8357033
>
>
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