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

Leonardo Saavedra lsaavedr at nrao.edu
Fri Aug 30 08:20:13 PDT 2019

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 

[60010.976717] Lustre: Lustre: Build Version: 2.10.4
[60011.029258] LNet: Added LNI at tcp [8/256/0/180]
[60011.029297] LNet: Accept secure, port 988
[60011.042970] Lustre: Server MGS version ( is much older than 
client. Consider upgrading server (2.10.4)

Leo Saavedra
National Radio Astronomy Observatory

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