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Date:      Mon, 04 Nov 2002 19:15:40 -0600
From:      Scott Gerhardt <scott@g-it.ca>
To:        <nbari@unixmexico.com>, <freebsd-isp@freebsd.org>
Subject:   Re: qmail + 1 million users
Message-ID:  <B9EC77DC.28E9%scott@g-it.ca>
In-Reply-To: <5.1.0.14.2.20021104175841.024c8b58@mail.centerone.com>

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Hmm, 1,000,000 users with 2MB quota each will require 2TB of disk space
minimum!  You will need an external fiber channel or similar storage array.




On 11/4/02 7:03 PM, "Ralph Forsythe" <rf-list@centerone.com> wrote:

> I can't really say on the load balancing, but for the other stuff:
>=20
> Your system is probably slow because of the swapping - that's a lot of
> continuous CPU and disk activity to slam it.  I'd say look at the total
> memory usage you have now (ram + swap), figure your growth in and scale
> accordingly leaving extra ram on top of that.  You should avoid swapping =
at
> all costs.
>=20
> The dual CPU is good, get the most you can afford there.  Your main
> bottleneck will be the disks - I recommend you actually run more than 2, =
if
> you can get a high performance RAID controller and several disks running
> the load will be split across the spindles and you'll see a major
> performance gain, plus data security.  With 1 million users I assume you
> can afford this.
>=20
> If you're load balancing you need to figure out how to replicate the data
> across servers.  That introduces a lot of complexity into the equation,
> since I'm sure there are multiple ways to accomplish what you need but
> finding the best one for your scenario and budget could be tricky...
>=20
> -rf
>=20
> At 04:17 PM 11/4/2002 -0600, you wrote:
>> Hi all
>>=20
>> i have almost 1 million users and i am using qmail with vpopmail
>> right now i have a compaq proliant 2 procesors p III and 1GB ram
>> users have 2MB Quota but the servers is geting slow, and i am using almo=
st
>> all my swap partition (85%) what hardware do you recomend for this serve=
r
>> and how can i balance the load on the server
>>=20
>> I am thinking on a dual xeon DELL poweredge 6600 with 6GB ram and two 73=
Gb
>> SCSI
>>=20
>> Thanks
>>=20
>>=20
>> -----------------------------------------
>> "UNIXMEXICO la comunidad *nix en todo M=E9xico!"
>> http://www.unixmexico.org/
>>=20
>>=20
>>=20
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>=20
>=20
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--=20
Scott Gerhardt, P.Geo.
Gerhardt Information Technologies [G-IT]



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