Hi Mark, The last time we did something like this was 2010 (we’re doing rolling refreshes now), so there are probably lots of better ways to do this than what we did, but we:
1) set up the new hardware 2) created new filesystems (so that we could make adjustments we wanted to make that can only be made at FS creation time) 3) used rsync to make a 1st pass copy of everything 4) coordinated a time with users / groups to do a 2nd rsync when they weren’t active 5) used symbolic links during the transition (i.e. rm -rvf /gpfs0/home/joeuser; ln -s /gpfs2/home/joeuser /gpfs0/home/joeuser) 6) once everybody was migrated, updated the symlinks (i.e. /home became a symlink to /gpfs2/home) HTHAL… Kevin On Oct 10, 2016, at 2:56 PM, mark.b...@siriuscom.com<mailto:mark.b...@siriuscom.com> wrote: Have a very old cluster built on IBM X3650’s and DS3500. Need to refresh hardware. Any lessons learned in this process? Is it easiest to just build new cluster and then use AFM? Add to existing cluster then decommission nodes? What is the recommended process for this? Mark This message (including any attachments) is intended only for the use of the individual or entity to which it is addressed and may contain information that is non-public, proprietary, privileged, confidential, and exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. This message may be viewed by parties at Sirius Computer Solutions other than those named in the message header. This message does not contain an official representation of Sirius Computer Solutions. If you have received this communication in error, notify Sirius Computer Solutions immediately and (i) destroy this message if a facsimile or (ii) delete this message immediately if this is an electronic communication. Thank you. Sirius Computer Solutions<http://www.siriuscom.com/> _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org<http://spectrumscale.org/> http://gpfsug.org/mailman/listinfo/gpfsug-discuss — Kevin Buterbaugh - Senior System Administrator Vanderbilt University - Advanced Computing Center for Research and Education kevin.buterba...@vanderbilt.edu<mailto:kevin.buterba...@vanderbilt.edu> - (615)875-9633
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