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Date: Sat, 24 May 1997 12:32:46 -0400
To: Jack Wenger <info@bentreality.com>
From: dennis <dennis@etinc.com>
Subject: Re: Clients per Bandwidth
Cc: freebsd-isp@FreeBSD.org
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At 01:46 PM 5/24/97 +1000, Daniel O'Callaghan wrote:
>
>
>On Fri, 23 May 1997, Jack Wenger wrote:
>
>> I'm trying to figure out how many virtual domains to put on a 128 ISDN
>> connected box. I've got a P133 w/ 64Mb ram, and a good fast SCSI subsystem.
>> So, is there a decent way to figure out when I need to move up the
bandwidth
>> ladder?
>> In other words, I wanna know how many concurrent requests I can handle. We
>> DON'T have anyone dialing in, just hosting web sites. 
>
>You can work it out yourself.  Average request is 10-15 kbytes.
>128k ISDN can handle 60 MB/hour at 100%.  To stay within the comfort range
>say 30 MB/hour, or 2-3000 requests/hour.
>
>It really is pretty basic mathematics, and you should also play around 
>with the figures to work out how much each average request costs you to 
>deliver in bandwidth terms.
>
>You should consider selling some *inbound* services (not a lot, but some) 
>or else you will be only half utilising your paid-for capacity.

Its basically a crapshoot (as you only need 1 "killer" site to trash the
whole 
equation). A bandwidth manager can help eliminate this possibility and
also allow you to sell chunks of bandwidth and price your services
accordingly.

Dennis