Re: [HPDD-discuss] strange message on mounting client 1.8.7 to lustre 2.5.3 servers
Hi Kurt,
On 03/24/2015 02:41 PM, Kurt Strosahl wrote:
While working the new lustre 2.5.3 file system I'm standing up
I see the below message in the logs for the client, and I was wondering what it means:
Lustre: Server MGS version (2.5.3.0) is much newer than client version (1.8.9)
Lustre: 11995:0:(obd_config.c:1127:class_config_llog_handler()) skipping 'lmv'
config: cmd=cf001,clilmv:lmv
Lustre: Server lustre2-MDT0000_UUID version (2.5.3.0) is much newer than client version
(1.8.9)
Is it just a result of the difference between client and server versions?
We are
seeing these messages, too. As far as I know, they are harmless
reminders that you just can't use some newly introduced features of the
lustre 2.x-branch when using 1.8 clients (i believe wide-striping is one
of these).
However, you can only upgrade the clients, when all servers are migrated
to 2.x. As long as you have to mount 1.8 file systems you need to stay
with the 1.8 clients.
In contrast to the above messages LU-3452 shows how the more severe case
looks like, i.e. when you explicitly enable a feature in Lustre 2, which
is not supported by the 1.8 clients (in that case it's the JobID feature).
best regards,
Martin