Experimental Physics and Industrial Control System
Subject: |
Re: Limits on CA message size? |
From: |
[email protected] (Jeff Hill) |
Date: |
Tue, 17 May 94 14:03:34 MDT |
>
> Steve Lewis writes:
> > Note that some clients like dm carefully keep only one connection per IOC.
> > Others may not. Again, Jeff and/or Andy can confirm what the demand is
> > for each instance of a sequencer: It uses CA but not TCP/IP, therefore,
> > it may be smart enough to not need the buffer.
>
> Why is not CA responsible for this junk? Why should the user programs
> have to worry about it?
>
> If CA handled this problem itself, we would have this problem solved in one
> single place... once and for all.
>
Within one UNIX process CA opens only one TCP/IP virtual circuit to each
IOC communicated with. The problem is that some applications create
additional independent UNIX processes to manage additional process
variables. These applications may end creating duplicate TCP/IP
circuits.
Jeff
______________________________________________________________________
Jeffrey O. Hill Internet [email protected]
LANL MS H820 Voice 505 665 1831
Los Alamos, NM USA 87545 FAX 505 665 5107
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