On 27/12/14 20:32, Lindsay Mathieson wrote:
I see a lot of people mount their xfs osd's with nobarrier for extra performance, certainly it makes a huge difference to my small system. However I don't do it as my understanding is this runs a risk of data corruption in the event of power failure - this is the case, even with ceph? side note: How do I tell if my disk cache is battery backed? I have WD Red 3TB (WD30EFRX-68EUZN0) with 64M cache, but no mention of battery backup in the docs. I presume that means it isn't? :)
Yep. If you have 'em plugged into a RAID/HBA card with a battery backup (that also disables their individual caches) then it is safe to use nobarrier, otherwise data corruption will result if the server experiences power loss.
Regards Mark _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
