paul at nfg
Nov 10, 2008, 5:09 AM
Post #2 of 2
(597 views)
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ezayen [at] gmail wrote:
> Hi all,
>
> I wanted first to congratulate all the dbmail developers abour the
> product that i find as the perfect mail solution.
>
> I work for an ISP, we are using open source software in 90% of our
> production platform.
>
> we are planning migration our mail solution (the last proprietary piece
> in the platform) to an open source solution.
>
> I'm considering using dbmail for mail storage.
>
> Some numbers :
> - 50.000 to 200.000 mailbox
> - 1TB to 4TB storage
> - 100-400 message per minute
> - 1000-4000 POP3 connection per minute
> - 50-300 Webmail (IMAP) connection per minute
>
> So my questions are:
> 1 - is it realistic to deploy dbmail (now 2.2.10) for such a platform?
It is, but use an island model manage the limit response times on the
database. Heavy concurrency on a single store will probably lead to IO
bottlenecks in the disk seeks. This does depend on concurrency levels of
course.
> 2 - should i wait until the 2.4 release which as i read in the wiki will
> improve scalability by multithreading and database connection pooling?
2.4 is aimed at much improved behaviour under heavy concurrencies. So
yes: it will help a lot because the number of database connections will
be much lower even under high loads.
> 3 - What is the hardware sizing necessary for deploing such a platform?
fast disks, plenty disk splindles, fat network pipes for the database
backend. The dbmail frontends don't need a lot, esp on 2.3.x. But the
exact specs depend a lot on the user load of course.
--
________________________________________________________________
Paul Stevens paul at nfg.nl
NET FACILITIES GROUP GPG/PGP: 1024D/11F8CD31
The Netherlands________________________________http://www.nfg.nl
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