If you are using Session Variables in a clustered environment, you must
enable session aware load-balancing. (forces the client not to be switched
between machines in the cluster, so the other machine(s) don't need to know
cfid/cftoken.)
>From: "Michael Paulsmeyer" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: RE: Session vars in a clustered environment
>Date: Wed, 17 May 2000 08:49:11 -0600
>
>I have one question dealing with client variables. The text at the end was
>taken from CF Help. I have a few questions...
>
>1. "If ID and token combinations already exist on each host in the
>cluster"
>How does each server know of the existence of other cfid/cftoken
>combinations on other servers?
>
>2. "common domain-level cookie" Where exactly is this domain-level cookie
>stored? In the client variable repository? ie. registry or db
>
>3. If a client is smart enough to ask me if two servers can create the
>same
>cfid/cftoken combination, am I supposed to say that CF 'magically' takes
>care of it?
>
>So, if anyone out there can explain exactly how this works I would greatly
>appreciate it.
>
>"ColdFusion 4.5 provides several client variable attributes in the
>CFApplication tag that allow you to maintain application state across a
>cluster when using server-side client variables. These attributes enable
>client variable management and set CFID and CFTOKEN cookies at the domain
>level (for example, .allaire.com). If ID and token combinations already
>exist on each host in the cluster, ColdFusion migrates the host-level
>cookies on each cluster member to the single, common domain-level cookie.
>Following the setting or migration of host-level cookies to a domain-level
>cookie, ColdFusion creates a new cookie (cfmagic) that tells ColdFusion
>that
>domain cookies have been set.
>
>This domain-level cookie allows a ColdFusion application to maintain
>specific client information across a server cluster."
>
>
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