Richard Reynolds wrote:
Just figured I'd ask,
and see if anyone here has any opinions on a starting distro for a
nearly mission critical but realtime embeded like system, I can easily
trade speed to get predictability, but cant compromise stability. Ive
currently got my eye on BlueCat but its not cheap and this project has
no $$ right now I know there are a zillion others or at least it feels
that way after spending a significant amount of time looking.
not sure how much it matters but ... I am currently set to run this on
an intel p3 based board
my biggest concerns are
I need USB support (1.1). I have not installed a smaller distro in a
while, but I think USB was more difficult. and as the USB has to be a
priority I suspect issues there. anyone know what I will run into driver
wise?
and size I dont have a lot of space for the OS 256mb for everything!
and getting at the unit, with no display/keyboard it leaves either
serial,ir or ethernet(thru crossover cord into laptop) to telnet/ssh
???better ideas??? into. though FWIW security is NOT an issue.
and I wont have any display to look to see how things are going, if they
are, and what broke if they are not. and lack of space might
significantly effect the amount of OS style logging being done.
You'd probably be best off doing a combination of using one of the USB-stick
distros and roll your own. Start with a USB stick distro that seems to best
fit your needs (just google for it, there are quite a few options here).
Then, replace the kernel with your own kernel with appropriate real-time
extensions. Not sure if the kernel with preemption will be sufficient for
you or something along the lines of RTAI. That's for you to figure out.
Good luck with it. I'll be interested to hear how your project progresses!
-Jon
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