Re: version 11 in plae upgrade and HDR

On 22 Apr, 01:28, "Neil Truby" <neil.tr...@ardenta.com> wrote: > <da...@smooth1.co.uk> wrote in message > > news:21f17bed-0c3a-4311-a7d5-ec3a0f09acdc@g30g2000yqc.googlegroups.com... > On 20 Apr, 14:13, "Neil Truby" <neil.tr...@ardenta.com> wrote: > > > > > "Nick Lello" <nick.le...@rentrakmail.com> wrote in message > > >news:mailman.140.1271749880.1071.informix-list@iiug.org... > > This is totally unsupported; but we managed to upgrade from 10.0.fc6 to > > 11.10.fc1 about 6 months ago in a similar situation (wide-area hdr, > > database > > too big to archive/restore over the network). > > > >> Here's what we did:- > > > All threads off, take both engines to quiescent mode > > Shutdown primary; onmode -yuck > > Shutdown secondary; onmode -yk > > Get the new Informix software in place on both servers (we have > > $INFORMIXDIR > > pointing to a symbolic link so we can upgrade easily) > > Bring up the primary -- allow all upgrade activity to complete > > Bring up the secondary --- internal upgrade processes + updated pages > > spooled through HDR appeared to perform the upgrade cleanly > > > >> I'll repeat, IBM in no way sanctioned or supported upgrading the HDR > > >> pair > > >> in this manner; we did this out of desperation to get the upgrade > > >> completed. > > > That's interesting. In depsperation, we might need to do this too ... > > This should be even easier using external backup and restore to > initiate HDR. > > http://publib.boulder.ibm.com/infocenter/idshelp/v10/index.jsp?topic=... > > >> 1. Create a third mirror for the primary at the secondary site (resync > > might take several days - fine) > > What kind of a mirror?  A SAN replication mirror (in our case, replicating > via 2Mbs IP from London to Sydney)? > Or, am I misunderstanding (probably!) ...? > > thanks Yes a SAN mirror, you did not state the the link was only 2MB, how much data do you have? How do you plan to reestablish replication if the secondary server suffers HBA failure and disk corruption?