Re: map RBD into CephFS?

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* On 26 Feb 2014, Gregory Farnum wrote: 
> >> > q1. CephFS has a tunable for max file size, currently set to 1TB.  If
> >> > I want to change this, what needs to be done or redone?  Do I have to
> >> > rebuild, or can I just change the param, restart services, and be off?
> >>
> >> What version are you running? It varies on whether that's set at FS
> >> creation time or (on new enough code, but I don't remember when
> >> off-hand) can be set via the cli ("ceph mds set max_file_size
> >> <size_in_bytes>".
> >
> > 0.72.1.  Would it be safe to try this and see?  Or could that break
> > something?  I assume that I'll know it worked if I can create a 1.6T
> > file. :)
> 
> If it accepts the command, it worked properly. ;)

No dice -- "set" not supported.  I can set this directly in ceph.conf,
though, right?  This is the advice I've seen before.  Is a restart of
ceph-mds sufficient to make that work, or would something need to be
recreated?

-- 
       David Champion • dgc@xxxxxxxxxxxx • University of Chicago
Enrico Fermi Institute • Computation Institute • USATLAS Midwest Tier 2
                      OSG Connect • CI Connect
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