How do you get zero down time doing this? We have sticky sessions on, so if we take a member of the cluster down, we loose like 50% of my users forcing them to relogin to the other member, in this case we have two memebers in the cluster.
DK On 6/9/05, Barney Boisvert <[EMAIL PROTECTED]> wrote: > > Application-scoped instances are a wonderful thing. And having a > clustered environment makes them easier to deal with, not harder, > because you can take a server out of the cluster, let it rebuild it's > in-memory instances without load, and then reinject it. Repeat for > the rest of the cluster, and you've got a zero-downtime upgrade. If > you've got a large cluster, best to take half the servers down, > upgrade them, then switch halves. As long as you don't need more than > half your servers to deal with the load (which you shouldn't, because > you should do upgrade under non-peak load, and most load cycles are > more than 50% deltas), you can do it all in two steps. > > Particularly with larger applications, instantiating a large number of > CFC instances on every request (rather than leaving them in the > application scope across requests) can be a real bottleneck. Hundreds > or thousands of milliseconds per request, if the instances need to do > complex initialization. Almost always better to cache the instances. > Just watch out for potential race conditions as multiple requests can > be accessing the shared instances at any given time. > > cheers, > barneyb > > On 6/9/05, Douglas Knudsen <[EMAIL PROTECTED]> wrote: > > I'd suggest keeping gateways with objects or purposes, having a > site-wide > > one will certainly tend to grow to immense porpotions. This from a bad > > experience following me around where I work. Also, IMHO, stay away from > > application scoped cfc instances unless you really really need them. > They > > are a PITA when you need to update the code, most notably when you are > in a > > clustered environment. > > > > DK > > -- > Barney Boisvert > [EMAIL PROTECTED] > 360.319.6145 > http://www.barneyb.com/ > > Got Gmail? I have 50 invites. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:209160 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
