Re: [Motion-user] Requirements x performance x max. number of cameras

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Hello,

I could reliably capture about 80 netcams at 320x240 on a dual Athlon MP 2800 CPU system with a framerate of about 2 frames-per-second.  This kept the CPU around 70-80% with little motion.  When motion was detected on several cameras at once, the CPU would peg at 100% - so I'm sure I was pushing it too hard.

If you want 15 fps with 40 netcams - go ahead and mulitply that out.  You'd need something pretty serious - especially if you want pre/post buffer recording where lots of data needs to be written to the disk at once.

You'd probably be happier - if not absolutely need - at least two very fast disks in RAID-0 or three in RAID-5 to keep from dropping frames from multiple simultanious cameras recording 15fps each. 

----- Original Message ----
From: Freitas Freitas <ca...@gm...>
To: mot...@li...
Sent: Wednesday, August 2, 2006 3:35:23 PM
Subject: [Motion-user] Requirements x performance x max. number of cameras

Hi,

     I was wondering about how many cameras can I use in a machine at
the same time. I am thinking, at this moment, about netcams. So, I
would like to know if its possible to someone to tell me about real
cases with motion, related to how many cams x performance x total of
cams.

     I have a PII 266, 192MB RAM, using 2 usb cams ( framerate 5 fps
and webcam at 1 fps ) and a TVIP100 ( same framerates ). It is working
fine, and the machine is running Apache (nph-mjprox) either. So, I was
thinking, what kind of machine I would need if I plug, for example, 40
netcams to motion, with 320x240 or 640x480, at 15 fps (at least),
capturing all movements all the time?

     I would appreciatte if someone could help me.

     Thank you for your attention,

Freitas

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