Re: Crush rule check

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Thanks Wido.

I had found the show-utilization test, but had not seen show-mappings - that confirmed it for me.

thanks,
 Adrian


> -----Original Message-----
> From: Wido den Hollander [mailto:wido@xxxxxxxx]
> Sent: Monday, 12 December 2016 7:07 PM
> To: ceph-users@xxxxxxxxxxxxxx; Adrian Saul
> Subject: Re:  Crush rule check
>
>
> > Op 10 december 2016 om 12:45 schreef Adrian Saul
> <Adrian.Saul@xxxxxxxxxxxxxxxxx>:
> >
> >
> >
> > Hi Ceph-users,
> >   I just want to double check a new crush ruleset I am creating - the intent
> here is that over 2 DCs, it will select one DC, and place two copies on separate
> hosts in that DC.  The pools created on this will use size 4  and min-size 2.
> >
> >  I just want to check I have crafted this correctly.
> >
>
> I suggest that you test your ruleset with crushtool like this:
>
> $ crushtool -i crushmap.new --test --rule 6 --num-rep 4 --show-utilization $
> crushtool -i crushmap.new --test --rule 6 --num-rep 4 --show-mappings
>
> You can now manually verify if the placement goes as intended.
>
> Wido
>
> > rule sydney-ssd {
> >         ruleset 6
> >         type replicated
> >         min_size 2
> >         max_size 10
> >         step take ssd-sydney
> >         step choose firstn -2 type datacenter
> >         step chooseleaf firstn 2 type host
> >         step emit
> > }
> >
> > Cheers,
> >  Adrian
> >
> >
> >
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