On Tue, May 09, 2000 at 07:38:14PM -0700, John Armstrong wrote:
> Lots of folks are saying the running File based sessions over NFS is
> problematic. We are doing it without any noticeable issues so far but
> I am _very_ curious as to what we need to watch out for. I'd like to
> meet the evil before I have to do battle with it if you get my drift.
> If anyone has any insight with some fairly specific examples that
> would be awesome. We're running our sessions off of a Network
> Appliance Filer and so far performance is fantastic as is data
> integrity..
The only problems that I've seen are 'hot' files that get accessed by
multiple httpd processes simultaneously. In the Apache::ASP
environment that would be Application, and it's internal housekeeping
database of sessions.
User session data tends to be accessed serially, i.e. only one web
request is reading/writing to it at a given moment. If you have
frames this assumption is invalid. Watch out for frames combined with
scripts. You will expose locking and/or data corruption when you do
this.
--
Paul Lindner
[EMAIL PROTECTED]
Red Hat Inc.
