Excerpts from mail: 30-Apr-93 Failover on dual ported drives Perry E.
Metzger@lehman. (851)
> Howdy!
> We've been thinking about dual porting and mirroring some disks
> containing critical AFS read/write volumes. The idea would be that in
> case of disk or host failure, we could just fail over to the mirror
> copy or other host. Mirroring is easy -- on the suns we use, we
> already have software that will trick the system into seeing mirrors
> as one device.
Is that software Sun's Online DiskSuite? If so, you have the problem
that it has its own version of fsck that won't work on AFS partitions.
We wanted to use it to make AFS partitions that span multiple drives.
Sun claims that Transarc wasn't interested in modifying AFS fsck to
handle the DiskSuite stuff.
> Our question is this: how do we manage the host
> failover. One thing we were thinking of was somehow tricking
> the VLDB into thinking that the backup host is the home of the volume
> in case the primary host goes down -- but this may very well not be
> the right way to do this. We want the system to be as automated and
> fast as possible as the volumes in question are critical for
> production and can't go down for more than a minute or two. Any ideas
> from the list?
> Perry Metzger
> Lehman Brothers
Keith Gorlen
National Institutes of Health
Bethesda, MD 20892
Phone: (301) 496-1111
FAX: (301) 402-2867
Internet: [EMAIL PROTECTED]
