On Wed, Dec 16, 2009 at 3:19 PM, Richard Brittain <[email protected]> wrote: > We have some large data volumes not backed up in any way other than a daily > replicate to a different server. The users normally access the volume via > an explicit RW mount point. > > My question is, if I want to drain a volume of all RW volumes so I can do > kernel updates etc. without a user-visible outage, is there any way to > effectively swap the RW and RO volumes. > Something like: > Lock RW > Release to bring RO in sync > Make RW 'offline' > Promote RO to RW in the VLDB > Demote old RW to RO in the VLDB > Unlock
I could imagine a tool which took the volume offline, rewrote the volume header, changed the VLDB entry to invert the IDs, and put it back online. There's no such tool that I know of now. However, once they're in sync, you might be able to vos clone the readonly on the non-rw site to an rw, then update the vldb. i'd have to read code/try it. _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
