Re: Calculating bandwidth Requirements
- From: "Mike Lowery" <selfspam@xxxxxxxxxxxxxxxx>
- Date: Thu, 28 Apr 2005 13:54:56 -0700
Don't forget network overhead. If your network packets are small (< 1500 bytes)
or get fragmented (usually the case) then there's extra overhead per packet. I
know that for UDP packets it's generally around 48 bytes per packet. If you're
sending say 30 packets per second, that's an extra 48 x 30 = 1.4KB/s. Not a
lot, but it may matter when bandwidth is tight.
The best way to measure actual bandwidth is to sniff your network using tools
like Ethereal.
"Bill Burns" <wilhelm_here@spamdotyahoodotcom> wrote in message
news:uNWv00oRFHA.2252@xxxxxxxxxxxxxxxxxxxxxxx
> Hi,
>
> Your bandwidth requirements are dictated by the bitrates of your content
> times the number of clients you want to have simultaneously connected.
>
> To work backwards, a T1 is roughly 1536k. Divide this by the bitrate of your
> content.
>
> For instance, if your video stream is a 256k bitrate, then the maximum
> number of clients you could support is 6. If you have a 64k audio file, then
> the maximum clients you could have simultaneously is 24.
>
> If you want to guarantee a minimum number of clients for each piece of
> content, you would need to create 2 publishing points, and limit the number
> of connections.
>
> For example, using the 256k video bitrate, and the 64k audio bitrate:
> If you want to guarantee at least 4 simultaneous users for each:
>
> Publishing point: /video/
> connection limit: 5 (5x256=1280k)
>
> Publishing point: /audio/
> connection limit: unlimited
>
> This would guarantee at least 256k (4 audio connections) for your audio
> point - and up to the full bandwidth if no one is viewing video (up to 24
> connections). It also limits your simultaneous video users to 5.
>
> Thanks,
> Bill
>
>
> "Bad Beagle" <badbeagle@xxxxxxx> wrote in message
> news:eZ3V7WCRFHA.2736@xxxxxxxxxxxxxxxxxxxxxxx
> >I currently have a Windows 2003 Server - 1.5 GB RAM, Xeon 3.06 GHz
> >processor. This servers sits in my DMZ and I am streaming 1 video stream
> >and 1 audio stream. I currently have the limits set to 110 players and
> >30000 kbps bandwidth. Can someone please tell me how to calculate the
> >bandwidth requirements so that I make the best use of my available
> >bandwidth? My internet feed is a T1. At this point I cannot use
> >multicast.
> >
>
>
.
- References:
- Calculating bandwidth Requirements
- From: Bad Beagle
- Re: Calculating bandwidth Requirements
- From: Bill Burns
- Calculating bandwidth Requirements
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