Hi! >No, I was indeed talking about the ext4 journals, e.g. described here: ... >but the problem with the persistent device names is keeping me from trying it. So you assume 3-way setup in Ceph: first drive for filesystem data, second drive for filesystem journal and third drive for ceph journal? And what is the benefits? Ceph journalling already support transactional writes and ext4 journaling doesn't improve it anyway. Maybe it is useful to split iops onto a pair devices instead of one? It is a too complicated setup, I think. Megov Igor CIO, Yuterra ________________________________________ От: ceph-users <ceph-users-bounces@xxxxxxxxxxxxxx> от имени Burkhard Linke <Burkhard.Linke@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> Отправлено: 7 августа 2015 г. 17:37 Кому: ceph-users@xxxxxxxxxxxxxx Тема: Re: Different filesystems on OSD hosts at the samecluster Hi, On 08/07/2015 04:30 PM, Udo Lembke wrote: > Hi, > I use the ext4-parameters like Christian Balzer wrote in one posting: > osd mount options ext4 = "user_xattr,rw,noatime,nodiratime" > osd_mkfs_options_ext4 = -J size=1024 -E lazy_itable_init=0,lazy_journal_init=0 Thx for the details. > > The osd-journals are on SSD-Partitions (without filesystem). IMHO ext4 don't support an different journal-device, like > xfs do, but I assume you mean the osd-jounal and not the filesystem journal?! No, I was indeed talking about the ext4 journals, e.g. described here: http://raid6.com.au/posts/fs_ext4_external_journal_caveats/ The setup is tempting (both ext4 + OSD journal on SSD), but the problem with the persistent device names is keeping me from trying it. Regards, Burkhard _______________________________________________ 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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