Re: Multiple IOC

[Andrew Johnson <anj@aps.anl.gov>]

Robert Emery wrote:
> I have two IOC's running on one linux PC.  One is using the default 
> ports and I changed the other's port using:
>
> EPICS_CA_REPEATER_PORT=5070
> EPICS_CA_SERVER_PORT=5071

Do you realize that you don't actually have to do that to run multiple 
IOCs on the same workstation (unless that's not why you're seting the 
port numbers); almost everything will work properly if you just run them 
normally and ignore the warning message from iocInit.

The only time when things might not work is if you have CA clients 
connecting to these IOCs from a different subnet and thus that have 
their EPICS_CA_ADDR_LIST set to the IP address of the host.  In those 
circumstances you might just see slow connections, or some channels 
might never connect if you're unlucky.

> I have been able to get an edm screen to see pv's from both IOC's by 
> changing the environment variable:
>
> EPICS_CA_ADDR_LIST=nnn.nnn.nnn.nnn nnn.nnn.nnn.nnn:5071
>
> I have not been able to get the two IOC's to see each others PV's.  Any 
> ideas how I would be able to do this?

To answer that, think of each IOC as just another CA client; set its 
EPICS_CA_ADDR_LIST to include the other's IP:Port combination and it 
should connect properly.

- Andrew
--
When a distinguished but elderly scientist states that something is
possible, he is almost certainly right.  When he states that something
is impossible, he is very probably wrong.  -- Arthur C. Clarke