Experimental Physics and
Industrial Control System

Heinrich du Toit <[email protected]> · Mon, 08 Oct 2007 16:35:59 +0200

Why not put the aliasing in a PV gateway?

This way you don't have to change the IOC's
And you don't have to change and client sofware.
You simply need to change the software on one gateway.

just an idea :)

On Mon, 2007-10-08 at 10:01 -0400, Lawrence T. Hoff wrote:
> 	I may have been the one who initiated the
> discussion a few years ago. I encountered a situation
> which I believed was best addressed using server-side
> aliases. I created a patch to EPICS core (which could
> be loaded into a VxWorks system as a separate module),
> which implemented server-side aliases.
> 
> 	The other option, of course, is client-side.
> E.g. aliases could be managed within a name server.
> At facilities which use databases to map "system
> names" to PVs, such a system could be used for aliases
> as well. Perhaps one of these solutions works for
> you?
> 
> 	If you'd like to try the server-side solution,
> I can try to dig up the module. IIRC, it supported a command
> (the kind that would go in st.cmd) which defined an alias
> to an existing PV, a command to print out alias information,
> and the support to add that alias to all the infrastructure
> for name lookup inside an IOC.
> 
> HTH -- Larry
> 
> P.S. As near as I could tell, there was not universal
> enthusiasm for server-side aliases at that time. Maybe
> at next week's EPICS collaboration meeting the discussion
> could begin anew?
> 
> Lecorche Eric wrote:
> > Hi,
> > 
> > We are currently wondering about the ability of having PV aliases to 
> > help to keep naming coherence as seen from operators even though 
> > developments have been done by different people with different views, 
> > software internals, concepts or architecture etc ...
> > 
> > I looked within the tech-talk that some years ago, there were some 
> > discussions concerning this point. What is the current status now ? Is 
> > it possible to specify aliases to existing PVs ?
> > 
> > If so, how can this be achieved ? If not, are there some workarounds ?
> > 
> > Eric LÃcorchÃ
> > 
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System