08-05-2009 09:48 AM
I have to an upgrade from 10.0 to 10.2.x and I would like to schedule an outage to do this - how long does it take to do upgrade of a pair of SIs?
08-05-2009 10:01 AM
It is possible to copy the images to the ServerIron during normal operation - the response times might decrease slightly but traffic should continue. You are going to see an outage as soon as you have to reload the ServerIron. The ServerIron is coming up pretty fast - I do have configs (some reals, some virtuals but not hundrets of them) with a reboot time of 80-95 seconds. To do the upgrade with ~ 2 minutes downtime from my point of view if you do prepare yourself well (have the command ready for cut and paste and so on).
I have done this already with close to no downtime taking about a cluster - all you need to do is to ensure at least one of them is available all the time.