Re: v0.75 released

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On Sat, 18 Jan 2014, Sage Weil wrote:
> On Sat, 18 Jan 2014, Alexandre Oliva wrote:
> > On Jan 15, 2014, Sage Weil <sage@xxxxxxxxxxx> wrote:
> > 
> > >  v0.75 291 files changed, 82713 insertions(+), 33495 deletions(-)
> > 
> > > Upgrading
> > > ~~~~~~~~~
> > 
> > I suggest adding:
> > 
> >   * All (replicated?) pools will likely fail scrubbing because the
> >     per-pool dirty object counts, introduced in 0.75, won't match.  This
> >     inconsistency is cleared by a pg repair; unfortunately this is about
> >     as expensive as a a deep-scrub, and it's not automatically scheduled
> >     or retried, like scrubs and deep-scrubs.
> > 
> > I suppose after the dirty counts are brought to sync, the next scrub
> > won't find inconsistent counts again, but I haven't got to that point
> > yet.
> 
> Whoops!  Yeah...
> 
> > What surprised me was the huge number of objects marked as dirty!  It
> > was at least 14k out of 70k objects in each data pool, and even more in
> > metadata pools, but it's not like I have messed with this many objects
> > recently.  Could something be amiss there?
> 
> The dirty state was introduced back in 0.71.  It's just the stats total 
> that was added in this release... that probably explains your situation.  
> 
> Which also means this will bite anybody who ran emperor, too.  I think I 
> need to introduce some pool flag or something indicating whether the dirty 
> stats should be scrubbed or not, set only on new pools?

Pushed wip-7184.  This still needs to be tested, but I probably won't get 
to it until Monday.  If someone wants to give it a go (on a non-production 
cluster), that'd be great!

sage
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