RE: Dynamic Loading and Unloading of EPICS Device Support and Record.

["Geng, Zheqiao" <gengzq@slac.stanford.edu>]

Hi Andrew, Leo,

   Thank you very much for your kind suggestions and helpful information!

   I will read the existing EPICS documents and follow Leo's suggestion - starting with
adding records dynamically. I will do some test to investigate feasibility/difficulties
to do that. Hope I can tell something after some time.

   The discussions are really helpful. The idea of restarting IOC with and adjusted database
file could be an good alternative for the uTCA application :)

   Thanks again for everybody!

Best wishes,
Qiao

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Zheqiao Geng
SLAC National Accelerator Laboratory
2575 Sand Hill Road, Mail Stop 64, Menlo Park, CA 94025-7015, USA
phone:  +1(650)926-4262                               
e-mail: gengzq@slac.stanford.edu
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  


-----Original Message-----
From: Andrew Johnson [mailto:anj@aps.anl.gov] 
Sent: Wednesday, September 08, 2010 12:58 PM
To: core-talk@aps.anl.gov; Geng, Zheqiao; Williams Jr., Ernest L.
Subject: Re: Dynamic Loading and Unloading of EPICS Device Support and Record.

On Wednesday 08 September 2010 14:06:04 Marty Kraimer wrote:
>
> Sounds like a really big job.

I agree.  I really think the idea of restarting the IOC with an adjusted 
database file would be *much* simpler to implement.

Maybe it would even be worth looking at running one IOC per removable device, 
then you just shut down the relevant IOC before taking it out.  I don't think 
a uTCA crate can contain more than a handful of cards, so one IOC per card 
should fit quite easily.

- Andrew
-- 
The best FOSS code is written to be read by other humans -- Harald Welte