Experimental Physics and
Industrial Control System

Steve Lewis <[email protected]> · Wed, 4 Feb 2009 07:11:59 -0800

At 6:46 PM -0700 2009/02/03, Jeff Hill wrote:

...long discussion omitted...

 - How would we actually like it to behave in the future.

Connect times should be as fast, and responsive to the appearance of a new
IOC, as possible without impacting overall network stability, but I suspect
that you are not surprised to hear that answer. I am actually quite
malleable to suggestions on how we can improve performance, but system
stability must be guaranteed as our first priority.

'...first priority'? I disagree.

While I appreciate the need to allow large sites to ensure network

stability *WITH PROPER CONFIGURATION* (and not too long ago SNS

presented a convincing field case), we should also allow a

knowledgeable EPICS administrator to configure a small test system to

achieve the historical fast reconnect times. Both scenarios are

equally important.

So my suggestion is: enable the historical behavior (using the

original code?) to take effect with the proper environment variables.

I could even live with conditional compilation (-DCA_BEST_RESPONSE vs

-DCA_MOST_STABILITY).

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System