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? :) -- Lindsay
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