On Wed, Nov 27, 2002 at 11:50:14AM +0100, Jurgen Philippaerts wrote:
> Hi,
>
> We are planning to upgrade our pop3 server (currently running on a dual
> cpu Sun E450) to a more redundant solution.
> with at least two qpoppers running, and using somekind of centralized
> storage.
>
> Is there something i should keep in mind ? is there anyone on this list
> who has such a setup, and would like to share his/her experiences ?
Solve the "centralized storage" bit first. With Solaris at least you
should have a good NFS implementation.
Get one qpopper running on a separate server from the one where the
storage and user info is located, and test that out. Then you can add
several identical systems and laodbalance them.
> i would prefer multiple pop3 servers, behind a loadbalancer, all active,
> and doing their thing, on the same storage.
The loadbalancing part is easy. There are probably hundreds of
different solutions for this, hardware and software. I prefer the
"load balancing switch" type solution, e.g. Foundry ServerIron.
Getting the user login data to be shared also has several solutions,
and though I'm not that familiar with Solaris, I know your options
there should include LDAP and NIS+ (as well as simply slaving the
password file from the master server.)
The shared dynamically upated data storage is the only hard part, but
if you use the maildir patches to qpopper and run on NFS, I think you
should be OK.
-- Clifton
--
Clifton Royston -- LavaNet Systems Architect -- [EMAIL PROTECTED]
"As for yourself, ... I am well disposed to hope you may hitherto have
escaped many Vices of your Country. But by what I have gathered from
your own Relation, and the Answers I have with much Pain wringed and
extorted from you, I cannot but conclude the Bulk of your Natives to be
the most pernicious Race of little odious Vermin that Nature ever
suffered to crawl upon the Surface of the Earth."
- Jonathan Swift, _Gulliver's Travels_
