G'day again everybody,
>> Here's a theoretical question for those of you using PHP's inbuilt session
>> facilities...
>>
>> How do you "keep" your variables across redundant servers? Or,
>> isn't anybody out there hosting PHP-based services on grouped
>> servers?
>
> You are right, by default PHP stores session data in /tmp, but there are
> ways to change this. First of all, rsync seems to be the least reliable
> method, nfs seems better (i would not try it though). I have seen
> session-handling implemented with postgresql (and i think porting it on
> mysql isn't that hard...). You may want to take a look at
>
> http://www.php.net/manual/en/ref.session.php
Considering NFS is stateless, why do you consider it to be a more acceptable
solution to, say, rsync (which I personally don't like - but that's another
matter)?
> Also see http://freshmeat.net/search/?q=php+session, there are a few
> implementations of db storage for sessions.
>
> Needless to say, having sessions stored on a database makes them available
> across a cluster.
I should have been "clearer" in my original question. It really was meant as
a "what are others doing" - we've developed a MySQL-based session handler for
a client (without wanting to start a flame war, I'd prefer to be using
PostgreSQL but it isn't available on the client's selected hosting service).
In our case, the web-servers are clustered, but I'm told the back-end
databases aren't.
>From what I've been reading over the last few days, there aren't that many
people hosting their services on a clustered setup, so this shouldn't really
affect them. But, with the discussions that have been going on w.r.t.
authentication and session-handling, I thought I should bring it up.
Ciao.
--
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Daniel Baldoni BAppSc, PGradDipCompSci | Technical Director
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Phone/FAX: +61-8-9364-8171 | Applecross
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"Any time there's something so ridiculous that no rational systems programmer
would even consider trying it, they send for me."; paraphrased from "King Of
The Murgos" by David Eddings. (I'm not good, just crazy)
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