failure-domain=host
yes (or rack/room/datacenter/..), for regular clusters it's therefore
absolute no problem as you correctly assumed.
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Am Sa., 13. März 2021 um 13:08 Uhr schrieb Janne Johansson
<icepic.dz(a)gmail.com>om>:
>
> Den lör 13 mars 2021 kl 12:56 skrev Marc <Marc(a)f1-outsourcing.eu>eu>:
> > > A good mix of size and performance is the Seagate 2X14 MACH.2 Dual
> > > Actor 14TB HDD.
> > > This drive reports as 2x 7TB individual block devices and you install
> > > a OSD on each.
> >
> > My first thought was, wow quite nice this dual exposes itself as two drives. I
was always under the impression that it was just one single drive with just more iops.
> > But come to think of it, with such a solution you do create a failure domain
that ceph does not know about. With the default host failure domain the only problem is
that you have an increased risk of 2 drives failing at once.
> > Is it possible to configure this drive whether it exposes itself as two drives
or just one bigger-faster one?
>
> Well, if you run with failure-domain=host, then if it says "I have 8
> 14TB drives and one failed" or "I have 16 7TB drives and two failed"
> isn't going to matter much in terms of recovery, is it?
> It would mostly matter for failure-domain=OSD, otherwise it seems about equal.
>
> --
> May the most significant bit of your life be positive.