You can certainly use a similarly named device to back an OSD journal if the OSDs are on separate hosts. If you want to take a single SSD device and utilize it as a journal for many OSDs on the same machine then you would want to partition the SSD device and use a different partition for each OSD journal. You might consider using /dev/disk/by-id/foo instead of /dev/fioa1 to avoid potential device reordering issues after a reboot. Hope that helps, sorry if I misunderstood.
On Wed, Oct 9, 2013 at 7:03 AM, Andreas Bluemle <[email protected] > wrote: > Hi, > > to avoid confusion: the configuration did *not* contain > multiple osds referring to the same journal device (or file). > > The snippet from ceph.conf suggests osd.214 and osd.314 > both use the same journal - > but it doesn't show that these osds run on different hosts. > > > Regards > > Andreas Bluemle > > > On Wed, 9 Oct 2013 11:23:18 +0200 > Andreas Friedrich <[email protected]> wrote: > > > Hello, > > > > I have a Ceph test cluster with 88 OSDs running well. > > > > In ceph.conf I found multiple OSDs that are using the same SSD block > > device (without a file system) for their journal: > > > > [osd.214] > > osd journal = /dev/fioa1 > > ... > > [osd.314] > > osd journal = /dev/fioa1 > > ... > > > > Is this a allowed configuration? > > > > Regards > > Andreas Friedrich > > ---------------------------------------------------------------------- > > FUJITSU > > Fujitsu Technology Solutions GmbH > > Heinz-Nixdorf-Ring 1, 33106 Paderborn, Germany > > Tel: +49 (5251) 525-1512 > > Fax: +49 (5251) 525-321512 > > Email: [email protected] > > Web: ts.fujitsu.com > > Company details: de.ts.fujitsu.com/imprint > > ---------------------------------------------------------------------- > > > > > > > > -- > Andreas Bluemle mailto:[email protected] > ITXperts GmbH http://www.itxperts.de > Balanstrasse 73, Geb. 08 Phone: (+49) 89 89044917 > D-81541 Muenchen (Germany) Fax: (+49) 89 89044910 > > Company details: http://www.itxperts.de/imprint.htm > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Kyle
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