Re: Scalable

2010-02-16 Thread Victor Duchovni
On Mon, Feb 15, 2010 at 04:56:44PM +0200, Timo Sirainen wrote: On 13.2.2010, at 0.41, Victor Duchovni wrote: No, this is largely irrelevant. What matters is the IMAP performance they expect, that IMAP servers are reasonably CPU and memory intensive. From what I've seen is that IMAP

Re: Scalable

2010-02-15 Thread Timo Sirainen
On 13.2.2010, at 0.41, Victor Duchovni wrote: No, this is largely irrelevant. What matters is the IMAP performance they expect, that IMAP servers are reasonably CPU and memory intensive. From what I've seen is that IMAP servers normally take less than 1% CPU load (mainly Dovecot, but I'd

Scalable

2010-02-12 Thread Jonathan Tripathy
Hi Folks, How scaleable is postfix and dovecot, using mysql for user databases, on one server? My current server has 256MB RAM (It's a VM on slicehost). How many users do you think that will handle? How much RAM/CPU would I need to host 600 users? Please remember, that due to the nature of

Re: Scalable

2010-02-12 Thread Aaron Wolfe
On Fri, Feb 12, 2010 at 12:14 PM, Jonathan Tripathy jon...@abpni.co.uk wrote: Hi Folks, How scaleable is postfix and dovecot, using mysql for user databases, on one server? My current server has 256MB RAM (It's a VM on slicehost). How many users do you think that will handle? How much

Re: Scalable

2010-02-12 Thread Stan Hoeppner
Aaron Wolfe put forth on 2/12/2010 11:39 AM: It might be better to think in terms of messages per hour than number of users. Most importantly, who are these users? Are they customers? Members of some society or club? Will these be their primary email accounts or secondary, tertiary, etc?

Re: Scalable

2010-02-12 Thread Victor Duchovni
On Fri, Feb 12, 2010 at 05:14:30PM -, Jonathan Tripathy wrote: My current server has 256MB RAM (It's a VM on slicehost). How many users do you think that will handle? Is more RAM substantially more expensive? 256 MB is rather meek these days. With physical servers, one typically gets 16GB

Re: Scalable

2010-02-12 Thread Jonathan Tripathy
Hi Everyone, Thanks for all the comments. The reason why I said 256MB RAM, is because that is currently what my VM has... If I were to take out a dedicated server with: 2.8 Dual Core 2GB RAM how much would that handle? My customer is a business, with 600 staff, however I think they just

Re: Scalable

2010-02-12 Thread Aaron Wolfe
On Fri, Feb 12, 2010 at 4:50 PM, Jonathan Tripathy jon...@abpni.co.uk wrote: Hi Everyone, Thanks for all the comments. The reason why I said 256MB RAM, is because that is currently what my VM has... If I were to take out a dedicated server with: 2.8 Dual Core 2GB RAM how much would

Re: Scalable

2010-02-12 Thread Victor Duchovni
On Fri, Feb 12, 2010 at 05:17:26PM -0500, Aaron Wolfe wrote: If you want to give your client good advice, you will have to measure their mail flow in a meaningful way. How many messages per second, minute, hour, day do you need to handle? How many concurrent SMTP sessions? Do they even care

Re: Scalable

2010-02-12 Thread Victor Duchovni
On Fri, Feb 12, 2010 at 06:24:59PM -0500, Aaron Wolfe wrote: If spam filtering is going to be used, it would be wise to consider those requirements as well. A host with 256MB of RAM is not going to be doing much heavy lifting with content inspection. -- Viktor. P.S. Morgan Stanley