Sounds like a good plan. I'd be happy to help out.
Ken Jones
Matthew Herman wrote:
>
> This brings up an interesting point about the performance of vpopmail and
> possibly tuning options. Does anyone have information about how much of a
> load a server can handle using the different authentication backend provided
> by vpopmail. Currently, vpopmail supports, in some way, MySQL, Open LDAP,
> Oracle, Syabse(Inter7's spelling but I have a feeling they mean Sybase).
>
> I have many friends that have had *terrible* problems with LDAP. This is
> mainly due to a threads issue during queries to the LDAP server, which
> queues queries behind each other instead of parallel processing them.
>
> I am currently running the MySQL backend of vpopmail and find the
> performance acceptable but not impressive. I prefer the database option for
> a multitude of different reason so I am willing to compromise on speed. But
> I don't know how much I am compromising.
>
> The other options (Oracle and Sybase) are commercial packages and I don't
> have them hanging around.
>
> There are testing tools out there for http tests
> (http://www.softwareqatest.com/qatweb1.html#LOAD) . It would (probably with
> standard disclaimer) not be hard to modify these tools to do something
> similar except for a pop3 client. I looked through freshmeat and could not
> find any testing tools for pop3 or IMAP. Does anyone know of a pop3 testing
> tool? I find it hard to believe that nobody in the open source community
> has not had this same question before and done something about it.
>
> If the tools exist or it is created, what would be the suit of tests to
> performance evaluate a configuration and what are valid configuration
> (database server is local vs. database server accessed via a tcp/ip
> socket.). Here is my initial list to consider
>
> *Test*
> Pop 3 connections
> inbound Mail processing test
> outbound mail relay-open based on ip address obtained through pop
> authentication
>
> *Configurations*
> Qmail 1.03 with patches
> Vpopmail with .cdb option
> Vpopmail with mysql (server local)
> Vpopmail with open ldap (server local)
> Vpopmail with mysql (server distant)
> Vpopmail with open ldap (server distant)
>
> The other side of this question is what can be done to speed up the process
> of pop3 access. I don't have any answers here.
>
> Matthew
>
> -=
>
> -----Original Message-----
> From: michael [mailto:michael]On Behalf Of Michael Boman
> Sent: Tuesday, July 18, 2000 1:14 AM
> To: Bill Shupp
> Cc: VPopMail
> Subject: Re: Large Scale site questions..
>
> Bill Shupp wrote:
> >
> > Is anyone using vpopmail with 20,000+ users (multiple domains), offering a
> web
> > based client and allowing other POP clients? If so, what web-based client
> is
> > being used, and what kind of hardware is being used? We're going to be
> setting
> > up such a system for a customer, and I'm looking for any tips/advice that
> others
> > can offer.
> >
> > Thanks,
> >
> > Bill Shupp
>
> We have 41 domains and total around 250k accounts using .cdb to store
> our users. Why we don't use mySQL is because it would kill the mySQL
> database with the number of pop3 connections our users do.
>
> It's a cluster with 4 nodes running qmail+vpopmail and 2 NFS servers.
> Look at the attached 'dia' layout (the program 'dia' can be found at
> freshmeat.net).
>
> This is not a final layout, we already have plans to use LDAP to auth.
> our users and decentralize our servers, but vpopmail's LDAP module is
> not ready yet for it (ie: you can't create users or split them over
> several machines/cluster of machines).
>
> We used software, hardware and techniques from:
>
> http://www.qmail.org/
> =====================
> qmail, daemontools, ucspi-tcp etc.
>
> http://www.inter7.com/vpopmail/
> ===============================
> VPopMail auth. module
>
> http://www.inter7.com/qmailadmin/
> =================================
> Web based email administration
>
> http://www.inter7.com/sqwebmail/
> ================================
> WebMail interface.
>
> http://www.linux-ha.org/
> ========================
> High availability for linux.
>
> http://www.linuxvirtualserver.org/
> ==================================
> Load balancer ideas.
>
> http://www.f5.com/
> ==================
> BigIP load balancer.
>
> http://www.ibm.com/
> ===================
> 4x Netfinity 4000R (2x PIII 750 MHz CPU, 512 Mb RAM, 2x9 Gb UW-SCSI HDD)
> for the nodes
> 2x Netfinity 1000 (can't remember the specs - old recycled machines) for
> the NFS servers.
>
> http://www.inter7.com/qmail/
> ============================
> For 24x7 support.
>
> Best regards
> Michael Boman
>
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