I asked them on twitter, let’s hope they elaborate on that.
But yeah, I bet someone "optimized" it with mount -o nobarrier …

Jan


> On 20 Jul 2015, at 14:56, Gregory Farnum <g...@gregs42.com> wrote:
> 
> "We responded immediately and confirmed the issue was related to filesystem 
> corruption on our storage platform. This incident impacted all block devices 
> on our Ceph cluster."
> 
> Just guessing from that, I bet they lost power and discovered their local 
> filesystems/disks were misconfigured to not be consistent in that scenario. 
> (Ie, they lost data which had been acked as safe-on-disk.) would love if they 
> discussed more what had actually gone wrong, though. (Note that they discuss 
> filesystem corruption on the storage platform, and that apparently that fs 
> corruption broke the block devices. If the ceph software was at fault I'd 
> expect them to phrase it the other way around.)
> -Greg
> On Mon, Jul 20, 2015 at 12:42 PM Dzianis Kahanovich <maha...@bspu.unibel.by 
> <mailto:maha...@bspu.unibel.by>> wrote:
> Reading on SourceForge blog, there are experienced ceph corruption. IMHO there
> will be good idea to know technical details. Version, what happened...
> 
> http://sourceforge.net/blog/sourceforge-infrastructure-and-service-restoration/
>  
> <http://sourceforge.net/blog/sourceforge-infrastructure-and-service-restoration/>
> 
> 
> --
> WBR, Dzianis Kahanovich AKA Denis Kaganovich, http://mahatma.bspu.unibel.by/ 
> <http://mahatma.bspu.unibel.by/>
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