Journals will default to being on-disk with the OSD if there is nothing specified on the ceph-deploy line. If you have a separate journal device, then you should specify it per the original example syntax.
Michael J. Kidd
Sr. Storage Consultant
Inktank Professional Services
Sr. Storage Consultant
Inktank Professional Services
On Fri, Mar 14, 2014 at 8:22 AM, Markus Goldberg <goldberg@xxxxxxxxxxxxxxxxx> wrote:
Sorry,
i should have asked a little bit clearer:
Can ceph (or OSDs) be used without journals now ?
The Journal-Parameter seems to be optional ( because of '[...]' )
Markus
Am 14.03.2014 12:19, schrieb John Spray:
Journals have not gone anywhere, and ceph-deploy still supports
specifying them with exactly the same syntax as before.
The page you're looking at is the simplified "quick start", the detail
on osd creation including journals is here:
http://eu.ceph.com/docs/v0.77/rados/deployment/ceph-deploy-osd/
Cheers,
John
On Fri, Mar 14, 2014 at 9:47 AM, Markus Goldberg
<goldberg@xxxxxxxxxxxxxxxxx> wrote:
Hi,
i'm a little bit surprised. I read through the new manuals of 0.77
(http://eu.ceph.com/docs/v0.77/start/quick-ceph-deploy/)
In the section of creating the osd the manual says:
Then, from your admin node, use ceph-deploy to prepare the OSDs.
ceph-deploy osd prepare {ceph-node}:/path/to/directory
For example:
ceph-deploy osd prepare node2:/var/local/osd0 node3:/var/local/osd1
Finally, activate the OSDs.
ceph-deploy osd activate {ceph-node}:/path/to/directory
For example:
ceph-deploy osd activate node2:/var/local/osd0 node3:/var/local/osd1
In former versions the osd was created like:
ceph-deploy -v --overwrite-conf osd --fs-type btrfs prepare
bd-0:/dev/sdb:/dev/sda5
^^^^^^^^^^ Journal
As i remember defining and creating a journal for each osd was a must.
So the question is: Are Journals obsolet now ?
--
MfG,
Markus Goldberg
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