>I'm no expert on this yet, and have not run session replication myself, >but when I was investigating this, many people warned of very high >network traffic for the replication (depending on how large your >sessions are).
I've only had this be a problem with sites running large amounts structures in memory. A MachII application comes to mind. It had TONS of data stored in the shared scopes. However, we maintain two clusters at 4 machines each with the a similar scenario as to what you have created. And this is for shared services. Of the failures we've had since moving to this model (late 2006), none have lead back to session replication. In addition, the JRun team has vastly improved the memory overhead with shared session copies in ColdFusion 8 with JRun updater 7. It no longer has to copy the entire object, but just those pieces which have changed. That, and the calls to accomplish the request have been reduced from 4 to 1. It's in the release notes for the updater. I'm moving all of our MX7 instances to this updater to take advantage of this. Matthew Williams Geodesic GraFX www.geodesicgrafx.com/blog ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;160198600;22374440;w Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:300008 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
