On Fri, Dec 5, 2014 at 4:25 PM, David Moreau Simard <dmsimard@xxxxxxxx> wrote: > What are the kernel versions involved ? > > We have Ubuntu precise clients talking to a Ubuntu trusty cluster without issues - with tunables optimal. > 0.88 (Giant) and 0.89 has been working well for us as far the client and Openstack are concerned. > > This link provides some insight as to the possible problems: Both servers and clients are Ubuntu Trusty. Kernel versions are a bit different: client: 3.13.0-39-generic #66 server: 3.13.0-32-generic #57 ceph version on both: 0.87 > http://cephnotes.ksperis.com/blog/2014/01/21/feature-set-mismatch-error-on-ceph-kernel-client > > Things to look for: > - Kernel versions > - Cache tiering > - Tunables > - hashpspool I have already read the blogpost, but I don't have much experience with tunables. >From what I understood I am missing: * CEPH_FEATURE_CRUSH_TUNABLES3 * CEPH_FEATURE_CRUSH_V2 but I don't know how to disable them, and I can't see them set in the crushmap I get from "ceph osd getcrushmap" .a. -- antonio.messina@xxxxxxxxxxx +41 (0)44 635 42 22 antonio.s.messina@xxxxxxxxx S3IT: Service and Support for Science IT http://www.s3it.uzh.ch/ University of Zurich Winterthurerstrasse 190 CH-8057 Zurich Switzerland _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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