On Tue, 19 Jun 2018 23:59:01 -0700 (PDT), Roger Law 
declaimed the following:


>Thanks for your reply.
>I didn't know that there are rpi cams out there.  But still, I don't
understand why I must not consider rpi as a small server. As far as I'm
concerned, normal performance problem should be solved by replacing a better
hardware component. In another word,
 what I have achieved on PC should work just fine on rpi, as long as I found a
correct model of rpi.

 What component are you envisioning changing? The processor/graphics on
an RPI is a single chip ("SoC" - System on Chip). Heck, the graphics
processor side is responsible for booting the ARM side! The Ethernet isn't
-- it's a USB to Ethernet adapter built onto the board, so limited to USB
traffic (and interference from other USB peripherals).

 The current fastest RPi is the 3B+ -- which, while being a 64-bit
quad-core, is hobbled by the standard OS release(s) still being 32-bit (to
be compatible across the line) It is only 1.4GHz, with 1GB of RAM.{There
may be 64-bit OS out there, but you are responsible for configuring it to
run}.

 About the only "component" you can work with is to add a USB hard-drive
for dynamic/updating data -- that will save the SD card from premature
wear-out if you have a lot of file updates (logging) taking place, and give
you a space to put a swap file (you do NOT want to run a swap on the SD
card).


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 Wulfraed                 Dennis Lee Bieber         AF6VN
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