[PHP] high availability From: Alex Verstraeten (alex <email protected>)
Date: 11/07/00

Hey guys,

anyone ever applied the Linux Virtual Server (or any other similar)
architecture on webservers running php applications?
the Linux Virtual Server homepage, if anyone is interested, is
http://www.LinuxVirtualServer.org

I was wishing to implement something like that, but I'm not quite sure how
can php fit there, the basic idea of this architecture is to have a load
balancer box which handles connections (http/https in my case) from clients
and passes them on the the real servers. Those real servers can share a
distributed fault-tolerance filesystem like CODA. That way I can have a
single copy of the php scripts that will be used by all servers, now, I'm
wondering about the following issues:

- Does php works fine over a CODA filesystem ?

- will it be enough to just set the session.save_path on all servers to be
stored at my CODA filesystem so all webservers can share sessions
information or should I write a session class/function to store that info on
a shared SQL backend instead?

- what database do you think it will fit into this architecture? (something
with mature load-balancing, high-availability features)

- do you know any better alternatives to this architecture?

Any suggestions are very very welcome :))

Regards,
Alex Verstraeten
Buenos Aires, Argentina. 

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