Hi All, We recently moved all of our metadata off of spinning hard drives to SSD’s via restriping. You can restripe only a specific pool with the “-P” option, so if you have only your metadata disks in the system pool then you can definitely do this…
Kevin, who does not work for IBM… ;-) > On Dec 10, 2015, at 7:56 AM, Jonathan Buzzard <[email protected]> wrote: > > On Thu, 2015-12-10 at 13:46 +0000, Luke Raimbach wrote: >> Hi All, >> >> Some years ago I remember adding more metadata SSDs to a GPFS 3.5 file >> system (system pool with MD only disks) and then trying to restripe the >> metadata. >> >> It didn’t work and I asked about it, only to discover that metadata >> doesn't get restriped. >> >> Has this changed? Does it matter if MD is not restriped? I ask because >> I'll probably want to add more MD SSDs to a new system in the near >> future. >> > > Hum, that is I believe inaccurate. Metadata does get restriped in at > least the case where you move it from one set of disks to another set of > disks. It should also get restriped it you change the replication > factor. However I am pretty sure that it gets restriped without the > necessity to move it from one set of disks to another as well. > > The caveat is that you cannot restripe *just* the metadata. You have to > restripe the whole file system... Or at least that used to be the case > and maybe why you have the idea the metadata didn't get restriped. > Whether this has changed in 4.x is another matter that perhaps someone > from IBM can answer. > > JAB. > > -- > Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk > Fife, United Kingdom. > > > _______________________________________________ > 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
