The pool that uses the (old) indep CRUSH rule will fail to peer...

On Thu, 5 Dec 2013, Loic Dachary wrote:

> 
> In PendingReleaseNotes:
> 
> >  - As part of fix for #6796, 'ceph osd pool set <pool> <var> <arg>' now
> >    receives <arg> as an integer instead of a string.  This affects how
> >    'hashpspool' flag is set/unset: instead of 'true' or 'false', it now
> >    must be '0' or '1'.
> >  
> > +- The behavior of the CRUSH 'indep' choose mode has been changed.  No
> > +  ceph cluster should have been using this behavior unless someone has
> > +  manually extracted a crush map, modified a CRUSH rule to replace
> > +  'firstn' with 'indep', recompiled, and reinjected the new map into
> > +  the cluster.  If the 'indep' mode is currently in use on a cluster,
> > +  the rule should be modified to use 'firstn' instead, and the
> > +  administrator should wait until any data movement completes before
> > +  upgrading.
> > +
> 
> What is the worst that can happen if someone overlooks this ?
> 
> ?
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> f]
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