Re: Session vars in a clustered environment

[Jay Sudowski - Handy Networks LLC]

Howard,

I've never used session vars in a clustered server setup, but I've read a
lot about doing it, so here goes nothing :-)
>
>
> I've never worked with session variables on clustered servers.  I read
> somewhere ... and can't remember where ... that I might have a problem
here.

You can setup the clustering server to use Sticky Sessions - though, this
isn't a truely load balanced solution.  Using load balancing, the idea is
that the load will be distributed over all the servers in the cluster.  With
sticky sessions, that happens only to a certain extent - once a user is
assigned to a server, the user stays on the server, regardless of the load
so that the session vars are preserved.
>
> What I want to do is have my forms (as I mentioned in a previous post)
> transform form vars over a series of submissions into session vars and
then
> collect the session vars at the end for input into the db.
>
> But this app is going to live on a server cluster.  Can I still do this?

If you're using Sticky Sessions, it should be fine.
>
> What about client vars?
>
> Aren't session vars stored in RAM and client vars in the registry (unless
> otherwise specified)?  And because of that, aren't they confined to a
single
> machine?
>
Configure CF server to store client variables in a database - storing client
vars in the registry is a bad idea in any setup beacuse if the registry hits
its max size, all sorts of undesireable things will happen :-(.  In a
clustered setup, if you setup CF to store the cient vars in the db, they
should be accessble to all the servers in the cluster.

- Jay
> What are my alternatives?
>
> H.
>
> =========================
> Howard Owens
> Web Producer
> InsideVC.com
> mailto:[EMAIL PROTECTED]
> =========================
>
>
>
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