athlon guidance

From: Joe Briggs (
Date: Sun Jun 01 2003 - 17:57:47 EST

I am attempting to build a 16-camera surveillance system with 8
2-channel multiplexed frame-grabber channels each.. Each channel is read
at at about 5 frames per second, the image converted into JPEG and
saved, and an MPEG-1 clip made at the same time (lots of storage, yes).
I typically use a small IDE drive for my OS, and a 2-drive RAID-0 built
with WD120JB 8-MB cache drives. I have learned the hard way that
regular IDE RAID controllers of the Promise type loose interrupts and
result in disk corruption, whereas the 3-ware (with its SCSI-like
hardware) are reliable. There is a LOT of processing and storage going
on here, and I have had good luck on my 8-camera systems using a
GigaByte GA7VAXP with AMD2400XP processors, but average about 10% CPU
utilization for each active (detected motion, now capturing and
encoding) channel. So when all 8 cameras are active, I sustain about
80% or more total CPU loading. Typically never more than 5 are active
at the same time. My question is how can I scale up to get 16 camera
channels? I use Debian Woody 2.4.19 with Reiserfs (good job Hans!).

The fastest Athlon that I can get is a AMD3200 XP with 400 Mhz FSB. On
the other hand, I can use the Tyan 2466 Dual Athlon board, but MP
processors only have a 266 Mhz FSB and the fastest speed is the 2800
MP. So, given the nature of the CPU and data intensive application,
which is the faster platform: a slower 2800/266 MHZ FSB dual processor
or a single 3200/400 MHZ FSB processor?

All suggestions and analysis welcomed.


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This archive was generated by hypermail 2b29 : Sat Jun 07 2003 - 22:00:15 EST