I had a problems between 2.9.0 servers and 2.10.1 clients. Actually from 2.10.1 clients I can list directories and files on my Lustre FS OSTs, but I am not able to access any file for reading or writing. I solved the problem decreasing the number of peer credits in ko2iblnd to 8 instead of 128, client side. This worked but I do not know exactly what is causing this problem. these are the errors I was getting.
Nov 21 11:23:35 psana101 kernel: Lustre: 2287:0:(client.c:2114:ptlrpc_expire_one_request()) @@@ Request sent has failed due to network error: [sent 1511292215/real 1511292215] req@ffff8801e8f08000 x1584330612541264/t0(0) o3->ffb11-OST000e-osc-ffff8806320a3000@172.21.52.66@o2ib2:6/4 lens 608/432 e 0 to 1 dl 1511292227 ref 2 fl Rpc:eX/2/ffffffff rc 0/-1 Nov 21 11:23:35 psana101 kernel: Lustre: 2287:0:(client.c:2114:ptlrpc_expire_one_request()) Skipped 366 previous similar messages Nov 21 11:23:35 psana101 kernel: Lustre: ffb11-OST000e-osc-ffff8806320a3000: Connection to ffb11-OST000e (at 172.21.52.66@o2ib2) was lost; in progress operations using this service will wait for recovery to complete On 11/9/17 3:13 PM, Dilger, Andreas wrote: > On Nov 9, 2017, at 05:27, Andrew Elwell <andrew.elw...@gmail.com> wrote: >>> My Lustre server is running the version 2.5 and I want to use 2.10 client. >>> Is this combination supported ? Is there anything that I need to be aware of >> 2 of our storage appliances (sonnexion 1600 based) run 2.5.1, I've >> mounted this OK on infiniband clients fine with 2.10.0 and 2.10.1 OK, >> but a colleague has since had to downgrade some of our clients to >> 2.9.0 on OPA / KNL hosts as we were seeing strange issues (can't >> remember the ticket details) > If people are having problems like this, it would be useful to know the > details. If you are using a non-Intel release, you should go through your > support provider, since they know the most details about what patches are > in their release. > >> We do see the warnings at startup: >> Lustre: Server MGS version (2.5.1.0) is much older than client. >> Consider upgrading server (2.10.0) > This is a standard message if your client/server versions are more than 0.4 > releases apart. While Lustre clients and servers negotiate the supported > features between them at connection time, so there should be broad > interoperability between releases, we only test between the latest major > releases (e.g. 2.5.x and 2.7.y, or 2.7.y and 2.10.z), it isn't possible to > test interoperability between every release. > > Cheers, Andreas > -- > Andreas Dilger > Lustre Principal Architect > Intel Corporation > > > > > > > > _______________________________________________ > lustre-discuss mailing list > lustre-discuss@lists.lustre.org > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org > _______________________________________________ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
