Title: Re: hardware specs
again, thank you so much for such a great and detailed answer.
you’ve helped a lot, and because of you, I have all my answers.
thank you again. : )
tahir
On 12/30/05 12:25 AM, "Daniel Liston" <dliston@sonny.org> wrote:
Your mileage may vary, but in terms of space, power, performance,
price, and heat, you may find the T1000 to be a better deal for
about the same price as the v210. In my opinion, they are both
noisy, but most people do not keep either one under their desk.
I have dequeued 375,000 messages from a Sun MTA on a sf440 class
server across a gigabit network to a Sun mailstore with the new
Niagra (CMT) processor and beta storage arrays in 30 minutes. I
doubt you will ever see this kind of performance when you have
forces outside your control acting against you, like destination
MX hosts off-line, DNS corruption, maximum recipient restrictions
with all the major online providers, etc.
To really answer your question, is the v210 big enough? That is
dependent on how many messages you need to send to your million
users each day, or how many lists with a million subscribers you
have. I like to err on the cautious side, but you need to do the
math. How many messages of what size to how many distribution
lists with how many zubscribers per day/week/month whatever?
You might be able to get more than 40 msg/sec off the system, but
even if you got 10 recipients per/msg successfully delivered,
100,000 / 40 is still 2,500 seconds, or about 42 minutes that has
to be dedicated to each distribution. Even getting 10 rcpt/msg
is a bit optimistic. Worst case scenario, going with a single
rcpt/msg, you are looking at 42 minutes stretching to 7 hours.
All these figures do not take into account the CPU or disk I/O
that would be required to queue the mail until delivered. The
way majordomo works, is one message to all one million recipients.
Very little disk space, but also makes delivery a serial process.
To optimize delivery, you create more messages with less addresses
per message to be delivered. This eats more CPU and more disk
just to prepare for delivery.
Sorry I could not give you an exact answer,
Dan Liston
Tahir Chaudry wrote:
> Dear Dan, thank you very much for your response. We are only sending
> out the mail, it is more of announcements only email.
>
> Thank you for a great insight about the bandwidth. Do you believe
> we need a bigger server if the bandwidth is under control?
>
> Thank you again,
>
> Tahir
>
>
> -----Daniel Liston said-----
>
> The server you are thinking of might be a bit weak for the size
> of the mailing list(s) you are considering. On the other hand,
> if you are running an announcement only (no replies or other
> interaction by your zubscribers), you might be looking at up to
> 40 msgs/sec output with a really fast MTA and 7Mbps connection.
> One outgoing distribution, on a 35k message requires 1.4Mbps of
> bandwidth to support 40 msg/sec.
>
> One of these lists distributing a 35k message would eat a full
> T1 pipe for over 7 hours. If you have varied bandwidth between
> sending and receiving data, it is your send pipe that can fill
> up. This calculation assumes a separate message for each and
> every recipient totalling 35Gb of data to move across the pipe.
>
> How long does it take you to copy 35Gb of data from one computer
> to another on your local (100Mbps?) network? Now factor in the
> speed of your internet connection.
>
> Dan Liston
>
> Tahir Chaudry wrote:
> > I need to setup a majordomo server for around 1 Million emails per user
> > list.
> >
> > we must use sun server. any idea what type of server would do the job?
> >
> > I was thinking V210 2x1.2GHz CPU plus 4 GB RAM.
> >
> > -- tahir
> >
>
>
-- tahir
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