On 9/19/06, Brent Nicholas <[EMAIL PROTECTED]> wrote:
I hate answering with "I thinks.." but I do recall in the Advanced CF Book for CF4.5 it had write up's on cluster cats in it for load balancing, I recall it talked about different techniques for making sessions portable. I'm guessing the new Advanced CF books might too.
If that's of help anyway.
Brent Nicholas - [EMAIL PROTECTED]
"I can't afford to make exceptions. Once word leaks out that a pirate has gone soft, people begin to disobey you, and then it's nothing but work, work, work, all the time."
-- Man in Black - Princess Bride
> Date: Wed, 20 Sep 2006 11:01:43 +1000
> From: [EMAIL PROTECTED]
> To: [email protected]
> Subject: [CFCDEV] pls forgiv OT: layer7 switches and sessions - is this correct?
>
> I'm sorry to post this question here but my regular CF list doesn't
> seem to have had much experiance in this area and I'm hoping someone
> here has. my knowledge of load balancing regarding application
> archetecture is rudamentary (at best)
>
>
> we've got a series of apps on clusters of two servers (each) with load
> balancing using Layer 7 switches. works great if one machine get's
> flakey, etc. this has all been done before I arrived.
>
> one thing that I'm a bit puzzled over, though, is all the apps have
> been designed without the use of session scope. in fact great reams of
> code have been written to handle authorisation via custom ISAPI
> components and headers to get around this, and is done on every
> request.
>
> it also means that ideas of using application- or server-scoped
> collections of data (or singleton components with state) can't be used
> (they could exist on one server and not on the other).
>
> is this correct? using load balancing like this precludes the use of
> shared scopes when it's needed across machines?
>
> is there any easy way** around this?
>
> note: these boxes are all CF6.1, although I am always looking for good
> reasons to get the boss to upgrade.
>
> (**something simplier than, say, getting webservices and/or gateways
> to communicate between machines - I'm thinking of the server-scoped
> singletons holding data)
>
> thank for your help
> barry.b
>
>
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