Hi Indra, The simplest way to do the fs and journal creation is to use the ceph-disk tool: ceph-disk prepare FSDDISK JOURNALDISK For example, ceph-disk prepare /dev/sdb # put fs and journal on same disk, or ceph-disk prepare /dev/sdb /dev/sdc # fs on sdb, journal on (a new part on) sdc It will create the partitions, label them, and then create the (by default, XFS) fs and initialize the journal. After that, udev magic will take care of all the mounting and starting of daemons for you. sage On Fri, 9 May 2014, Indra Pramana wrote: > Hi Sage, > Sorry to chip you in, do you have any comments on this? Since I noted you advised Tim Snider on > similar situation before. :) > > http://www.spinics.net/lists/ceph-users/msg05142.html > > Looking forward to your reply, thank you. > > Cheers. > > > > On Wed, May 7, 2014 at 11:31 AM, Indra Pramana <indra at sg.or.id> wrote: > Hi Craig and all, > > I checked S?bastien Han's blog post, it seems that the way how the journal was mounted is a > bit different, is it because the article was based on older version of Ceph? > > ==== > $ sudo mount /dev/sdc /journal > > $ ceph-osd -i 2 --mkjournal > 2012-08-16 13:29:58.735095 7ff0c4b58780 -1 created new journal /journal/journal for > object store /srv/ceph/osd2 > > $ sudo service ceph start osd.2 > === osd.2 === > Starting Ceph osd.2 on ceph03... > starting osd.2 at :/0 osd_data /srv/ceph/osd2 /journal/journal > ==== > > From what I can see, on all my OSD nodes in my Ceph cluster, the journal is mounted on > this folder (or file?) instead of /journal: > > /var/lib/ceph/osd/ceph-X/journal > > which in turns is a symbolic link to this file: > > lrwxrwxrwx 1 root root 58 Apr? 6 23:45 journal -> > /dev/disk/by-partuuid/3ff2c20c-6b58-41d3-9e7e-b3ec63c62c2f > > which in turns is a symbolic link to the journal partition on the device: > > lrwxrwxrwx 1 root root 10 May? 3 23:48 3ff2c20c-6b58-41d3-9e7e-b3ec63c62c2f -> ../../sdf1 > > I am using one SSD for journals for multiple OSDs within a node. Any advise on the > correct way how to mount and create the journal? Do I need to mount first, or create > first? Because I supposed that we need to mount to the partition *after* the journal is > created? > > I am using latest stable version of Dumpling (v0.67.7). > > Any advice is greatly appreciated. > > Thank you. > > > > On Wed, May 7, 2014 at 1:40 AM, Craig Lewis <clewis at centraldesktop.com> wrote: > On 5/6/14 03:34 , Gandalf Corvotempesta wrote: > > Hi to all, > I would like to replace a disk used as journal (one partition for each OSD) > > Which is the safest method to do so? > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > I haven't tried this yet, but I imagine that the process is similar to moving your > journal from the spinning disk to an SSD. > > S?bastien Han had a blog post about this: > http://www.sebastien-han.fr/blog/2012/08/17/ceph-storage-node-maintenance/ > > > > -- > > Craig Lewis > Senior Systems Engineer > Office +1.714.602.1309 > Email clewis at centraldesktop.com > > Central Desktop. Work together in ways you never thought possible. > Connect with us ? Website ?|? Twitter ?|? Facebook ?|? LinkedIn ?|? Blog > > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > >
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