Hi Alex, This set up seems close to what I am trying to achieve. With regards to this kind of replication: any prereqs need to be met in the target environment for this to work? for example, should disk devices naming on AIX be the same as in the source environment? when importing the mmsdrfs file, how is Scale going to know which disks should it assign to the cluster? by their hdisk name alone?
Thanks again, 2018-01-24 2:30 GMT-05:00 Alex Levin <[email protected]>: > Hi, > > We are using a similar type of replication. > I assume the site B is the cold site prepared for DR > > The storage layer is EMC VMAX and the LUNs are replicated with SRDF. > All LUNs ( NSDs ) of the gpfs filesystem are in the same VMAX replication > group to ensure consistency. > > The cluster name, IP addresses , hostnames of the cluster nodes are > different on another site - it can be a pre-configured cluster without > gpfs filesystems or with another filesystem. > Same names and addresses shouldn't be a problem. > > Additionally to the replicated LUNs/NSDs you need to deliver copy > of /var/mmfs/gen/mmsdrfs file from A to B site. > There is no need to replicate it in real-time, only after the change of > the cluster configuration. > > To activate site B - present replicated LUNs to the nodes in the DR > cluster and run mmimportfs as "mmimportfs fs_name -i copy_of_mmsdrfs" > > Tested with multiples LUNs and filesystems on various workloads - seems > to be working > > --Alex > > > On Wed, Jan 24, 2018 at 1:33 AM, Harold Morales <[email protected]> > wrote: > >> Thanks for answering. >> >> Essentially, the idea being explored is to replicate LUNs between >> identical storage hardware (HP 3PAR volumesrein) on both sites. There is an >> IP connection between storage boxes but not between servers on both sites, >> there is a dark fiber connecting both sites. Here they dont want to explore >> the idea of a scaled-based. >> >> >> _______________________________________________ >> 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 > >
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