About five years ago (I think) Apple slipped a volume manager[1] in on the unsuspecting. :) If you have a Mac, you might have noticed that the mount type/pattern changed with Lion. CoreStorage was the beginning of building the infrastructure to change a million(?) Macs and several hundred million iPhones and iPads under the users’ noses. :)
Has anyone seen list of the features that would require the on-disk upgrade? If there isn’t one yet, I think that the biggest failing is not not publishing it — the natives are restless and it’s not like IBM wouldn’t know... [1] This is what Apple calls it. If you’ve ever used AIX or Linux you’ll just chuckle when you look at the limitations. -- Stephen > On Nov 29, 2017, at 11:51 AM, Buterbaugh, Kevin L > <kevin.buterba...@vanderbilt.edu> wrote: > > Hi All, > > Well, actually a year ago we started the process of doing pretty much what > Richard describes below … the exception being that we rsync’d data over to > the new filesystem group by group. It was no fun but it worked. And now > GPFS (and it will always be GPFS … it will never be Spectrum Scale) version 5 > is coming and there are compelling reasons to want to do the same thing over > again … despite the pain. > > Having said all that, I think it would be interesting to have someone from > IBM give an explanation of why Apple can migrate millions of devices to a new > filesystem with 99.999999% of the users never even knowing they did it … but > IBM can’t provide a way to migrate to a new filesystem “in place.” > > And to be fair to IBM, they do ship AIX with root having a password and Apple > doesn’t, so we all have our strengths and weaknesses! ;-) > > Kevin > — > Kevin Buterbaugh - Senior System Administrator > Vanderbilt University - Advanced Computing Center for Research and Education > kevin.buterba...@vanderbilt.edu - (615)875-9633 > >> On Nov 29, 2017, at 10:39 AM, Sobey, Richard A <r.so...@imperial.ac.uk> >> wrote: >> >> Could we utilise free capacity in the existing filesystem and empty NSDs, >> create a new FS and AFM migrate data in stages? Terribly long winded and >> frought with danger and peril... do not pass go... ah, answered my own >> question. >> >> 😊 >> >> Richard >> >> -----Original Message----- >> From: gpfsug-discuss-boun...@spectrumscale.org >> [mailto:gpfsug-discuss-boun...@spectrumscale.org] On Behalf Of Jonathan >> Buzzard >> Sent: 29 November 2017 16:35 >> To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org> >> Subject: Re: [gpfsug-discuss] Online data migration tool >> >> On Wed, 2017-11-29 at 11:00 -0500, Yugendra Guvvala wrote: >>> Hi, >>> >>> I am trying to understand the technical challenges to migrate to GPFS >>> 5.0 from GPFS 4.3. We currently run GPFS 4.3 and i was all exited to >>> see 5.0 release and hear about some promising features available. But >>> not sure about complexity involved to migrate. >>> >> >> Oh that's simple. You copy all your data somewhere else (good luck if you >> happen to have a few hundred TB or maybe a PB or more) then reformat your >> files system with the new disk format then restore all your data to your >> shiny new file system. >> >> Over the years there have been a number of these "reformats" to get all the >> new shiny features, which is the cause of the grumbles because it is not >> funny and most people don't have the disk space to just hold another copy of >> the data, and even if they did it is extremely disruptive. >> >> JAB. >> >> -- >> Jonathan A. Buzzard Tel: +44141-5483420 >> HPC System Administrator, ARCHIE-WeSt. >> University of Strathclyde, John Anderson Building, Glasgow. G4 0NG > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
