Hello Sage. I'm running xfs and crashes are rarely enough. When they do happen, I would rather just rebuild the entire cluster than bother with fsck anyway.
So can you show me how to turn off journalling using the xfs FileStore backend? :) Charles ------Original Message------ From: Sage Weil To: Charles 'Boyo Cc: ceph-users@lists.ceph.com Subject: Re: [ceph-users] Disabling OSD journals, parallel reads and eventual consistency for RBD Sent: Jun 13, 2014 00:29 On Thu, 12 Jun 2014, Charles 'Boyo wrote: > Hello list. > > Is it possible, or will it ever be possible to disable the OSD's > journalling activity? > > I understand it is risky and has the potential for data loss but in my > use case, the data is easily re-built from scratch and I'm really > bothered about the reduced throughput "wasted" on journalling. We are investigating alternative backends that do not require the journal. There are also half-baked plans to avoid the double-writes when running on btrfs. You definitely do not want to disable the journal or stick it on a ramdisk for ext4/xfs, though, or you will corrupt the OSD's data on crash. sage Sent from my BlackBerry® wireless handheld from Glo Mobile. _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
