Cyrus aggregate compatibility.

[Bron Gondwana]

>From 2.3 to 2.4 upgraded automatically.

>From x to 2.5 doesn't upgrade automatically at the moment.  You have to run
reconstruct -V max on the folder afterwards.

Maybe for the XFER case we should upgrade automatically... I'll talk to Ellie
about that when she gets in today.  She's the 2.5 maintainer now.

Bron .

On Tue, Apr 21, 2015, at 08:51 AM, Andrew Morgan wrote:
> Does an XFER automatically upgrade the mailbox to the new format?  I don't 
> remember having performance problems when I moved users from a v2.3 
> backend to a new v2.4 backend (a long time ago).
> 
>  	Andy
> 
> On Tue, 21 Apr 2015, Bron Gondwana wrote:
> 
> > I would wait for 2.5.1, which should be out in a day or so.  There were
> > some XFER bugs in 2.5.0.
> >
> > The IO hit will have to be taken regardless, it's just deferred
> > slightly.  The 2.5 backend will work with 2.2 proxies just fine, though
> > of course most of the new features won't be visible to your clients,
> > because 2.2 gives a much reduced capability string.
> >
> > Longer term, we're looking at a full unified clustering system which might
> > still include murder or might be totally separate.  It's going to be very nice,
> > but it will only work for 3.0+ servers.
> >
> > Bron.
> >
> > On Tue, Apr 21, 2015, at 08:07 AM, Michael Sofka wrote:
> >> On 2015-04-20 17:16, ktm at rice.edu wrote:
> >>> On Mon, Apr 20, 2015 at 05:11:00PM -0400, Michael D. Sofka wrote:
> >>>> Under the scenario, would 2.5 work better?
> >>>>
> >>>> Mike
> >>>>
> >>> Hi Mike,
> >>>
> >>> In our case, the unconstrained I/O caused by the mandatory mailbox
> >>> format conversion on first use would have necessitated a prolonged
> >>> service outage to prevent overloading the system. 2.5 will allow you
> >>> to schedule your conversions while the system is functional. This
> >>> may not be a concern for you.
> >>
> >>
> >> Hum, it might....  This would drive up the load on the 2.4 system as
> >> I'm moving mailboxes?
> >>
> >> This project is driven entirely by the state of the SAN disks.  They
> >> are either old with controller errors, or expensive to keep on
> >> service, or needed elsewhere in a chain of updates.  Plan B is to
> >> clone the existing
> >> 2.3 server, but if I can get a new OS and application image in the
> >>   process, I will be a happy camper.  But even doing that is exceeding
> >>   my mandate.
> >>
> >> But if a 2.5 image will work with 2.2 front-end proxies, the deferred
> >> conversion is worth considering.  I do anticipate the moves being off-
> >> hours, but even off-hours is busy.
> >>
> >> Mike
> >>
> >>
> >> --
> >> Michael D. Sofka               sofkam at rpi.edu C&MT Sr. Systems
> >> Programmer,   Email, TeX, Epistemology Rensselaer Polytechnic
> >> Institute, Troy, NY.  http://www.rpi.edu/~sofkam/
> >>
> >> ----
> >> Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info:
> >> http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe:
> >> https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
> >
> >
> > --
> >  Bron Gondwana
> >  brong at fastmail.fm
> > ----
> > Cyrus Home Page: http://www.cyrusimap.org/
> > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/
> > To Unsubscribe:
> > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
> >


-- 
  Bron Gondwana
  brong at fastmail.fm