> -----Original Message----- > From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of > Marek Dohojda > Sent: 01 December 2015 19:34 > To: Wido den Hollander <wido@xxxxxxxx> > Cc: ceph-users@xxxxxxxxxxxxxx > Subject: Re: OSD on a partition > > Well so here is my problem. I want to move journal to SSD, but I have no > more Disk slots available, and the SSD I do have is used for my higher IO > OSDs. Hence I don?t want to lose my OSD. > > So my thought was to partition the SSD into 10G and the rest with the ?rest? > being used for OSD, while the 10G be used for Journal. However I can?t find > a reliable way to put OSD on a partition which is why I am wondering if there > is a way to do it. I'm wondering if you can stop the SSD OSD, unmount, shrink the partition, add the extra journal partition, start the OSD. Then stop the disk based OSD, flush the journal, move to new partition on SSD and then start it. > > Alernatively I could put the Journal on the SSD itself (it is ext4 file system) but > not sure if that wouldn?t be bad from perspective of Ceph to do. > > Down the road I will have more SSD but this won?t happen until new budget > hits and I can get more servers. > > > > > On Dec 1, 2015, at 12:11 PM, Wido den Hollander <wido@xxxxxxxx> > wrote: > > > > On 12/01/2015 07:29 PM, Marek Dohojda wrote: > >> I am looking through google, and I am not seeing a good guide as to > >> how to put an OSD on a partition (GPT) of a disk. I see lots of > >> options for file system, or single physical drive but not partition. > >> > >> http://dachary.org/?p=2548 > >> > >> This is only thing I found but that is from 2 years ago and no > >> comments if this works or not. > >> > >> Is there a better guide/best practice for such a scenario? > >> > > > > Well, what is the thing you are trying to achieve? All tools want full > > disks, but an OSD doesn't want it persé. It just wants a mount point > > where it can write data to. > > > > You can always manually bootstrap a cluster if you want to. > > > >> > >> > >> > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@xxxxxxxxxxxxxx > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > > > > > > -- > > Wido den Hollander > > 42on B.V. > > Ceph trainer and consultant > > > > Phone: +31 (0)20 700 9902 > > Skype: contact42on > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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