Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Wed, 5 Sep 2007 12:13:48 -0500

Ralph said:

> ChannelWatcher only replaces the "save" part of that system: the 
> original AutoSaveRestore writes the data directly from the IOC to a 
> file, while the ChannelWatcher is a daemon on a remote system, that 
> collects the data through channel access to write it locally to file.

I believe that the save part of AutoSaveRestore also uses channel
access, so that it does not need to be running on the same IOC that
hosts PVs being saved.  It could be run on another machine, and so in
that sense is like ChannelWatcher.

Mark

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Ralph Lange
> Sent: Tuesday, September 04, 2007 3:58 AM
> To: Heinrich du Toit
> Cc: EPICS Tech Talk
> Subject: Re: channelwatcher vs BURT
> 
> Hello Heinrich,
> 
> You are correct:
> 
> BURT is about saving and restoring snapshots. You have pre-configured 
> lists of channels, and the operator decides at a certain 
> moment to take 
> a snapshot of the listed channels' values. This snapshot is 
> saved as (a 
> set of) file(s), and can be restored to the channels at a later time.
> 
> AutoSaveRestore is about having channels keep their values during a 
> reboot. You have similar pre-configured lists of channels, but the 
> values are continuously saved to file, and the IOC loads the 
> most recent 
> values back during startup.
> 
> ChannelWatcher only replaces the "save" part of that system: the 
> original AutoSaveRestore writes the data directly from the IOC to a 
> file, while the ChannelWatcher is a daemon on a remote system, that 
> collects the data through channel access to write it locally to file.
> 
> There are GUI interfaces to BURT: Thomas Birke wrote one 
> (TCL/TK) that 
> we use at BESSY ([email protected]), Steve Singleton 
> recently wrote 
> a new GUI with similar features (python), which is in use at Diamond. 
> (He was giving a talk at the last EPICS meeting, you will find his 
> slides on the meeting page.)
> 
> Hope this helps,
> Ralph
> 
> 
> Heinrich du Toit wrote:
> > Hi
> >
> > Am I correct in saying that channel watcher and BURT does 
> not do exactly
> > the same thing?
> >
> > channel watcher will make sure PVs keep values between IOC reboots
> > (crashes/powertrips)
> >
> > while BURT can be used if we have multiple/different setups for PVs
> > inside IOCs.
> >
> > So actually both is needed?
> >
> > Is there some kind of GUI interface to manage BURT?
> > So that operators can easily switch between different configs?
> >
> > -Heinrich
> >
> >   
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System