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jburdette

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I am in the process of setting up and rolling out Kerio MailServer 6. Does anyone have a good fomula or idea for bandwidth requirements. I going to have about 1500 mail accounts. I currently monitoring my network usage to see were I'm now, but before I roll out to so many users I want to make sure I have a large enough pipe.
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winkelman

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What kind of users? 1500 POP3 users or 1500 KOC users makes a rather large difference...
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jburdette

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1250 users are students and will be using the Kerio webmail and 250 are staff and faculty that will be using Outlook with Kerio connector\
Joe
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winkelman

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In my company, 60 simultaneous Webmail users use in total on average about 75-100 Kbits/sec, peaking to 800 Kbits/sec. These are 30 second averages, so actual peaks are a lot higher.

I estimate KOC users to take up double the bandwith of webmail users (perhaps someone should verify this figure).

So that would translate to you as about:
1.5-2.0 Mbit/sec average, peaking to 16 Mbit/sec for Webmail
0.7-0.9 Mbit/sec average, peaking to 7.2 Mbit/sec for KOC
2.2-2.9 Mbit/sec average, peaking to 23.2 Mbit/sec in total

These would be my very rough estimates based on my users.

Oh, and a tip: for so many users, buy the fastest hard disk subsystem money can buy... I would say, think simultaneous striping to multiple disks type of speeds.

Edit: my figures are based on all your users being logged in at once, not a very likely scenario perhaps.

[Updated on: Thu, 14 September 2006 17:37]

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