Thomas,
As a general rule, Lustre only supports mixing versions on servers for rolling upgrades. - Patrick ________________________________ From: lustre-discuss <[email protected]> on behalf of Thomas Roth <[email protected]> Sent: Wednesday, April 24, 2019 3:54:09 AM To: [email protected] Subject: [lustre-discuss] 2.10 <-> 2.12 interoperability? Hi all, OS=CentOS 7.5 Lustre 2.10.6 One of the OSS (one OST only) was upgraded to zfs 0.7.13, and LU-11507 forced an upgrade of Lustre to 2.12 Mounts, reconnects, recovers, but then is unusable, and the MDS reports: Lustre: 13650:0:(mdt_handler.c:5350:mdt_connect_internal()) test-MDT0000: client test-MDT0000-lwp-OST0002_UUID does not support ibits lock, either very old or an invalid client: flags 0x2041401043000020 So far I have not found any hints that these versions would not cooperate, or that I should have set a certain parameter. LU-10175 indicates that the ibits have some connection to data-on-mdt which we don't use. Any suggestions? Regards, Thomas -- -------------------------------------------------------------------- Thomas Roth Department: Informationstechnologie Location: SB3 2.291 GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 1, 64291 Darmstadt, Germany, www.gsi.de Commercial Register / Handelsregister: Amtsgericht Darmstadt, HRB 1528 Managing Directors / Geschäftsführung: Professor Dr. Paolo Giubellino, Ursula Weyrich, Jörg Blaurock Chairman of the Supervisory Board / Vorsitzender des GSI-Aufsichtsrats: State Secretary / Staatssekretär Dr. Georg Schütte _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
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