On Thu, 2006-03-23 at 23:18 -0600, Michael Borland wrote:
> Ernest,
>
> At APS we use alh for alarm handling (to alert operators to alarms and
> help them investigate alarms) and sddsalarmlog for alarm logging (for
> archival purposes and analysis). The text log files from alh are not that
> convenient for postprocessing and can get rather large (though this is not
> a big problem now as it was during commissioning).
> sddsalarmlog also
> optionally grabs the value of a related PV when the alarm goes off, which
> makes it easier to figure out what happened. Since the input files to
> sddsalarmlog are SDDS files, much of the maintenance is automated (e.g.,
> when PV names change or PVs are deleted). Since sddsalarmlog is not
> dependent on a GUI, we start/restart it with a cron job so it is
> "guaranteed" to always be running.
This is the behavior we need with respect to alarm logging.
>
> We have a Tcl/Tk application that allows analysis of sddsalarmlog output,
> giving time histograms, alarm history, alarm counts per PV, alarm overlap
> analysis, status word decoding, etc.
That is very useful. We will need the same here.
Thanks for sharing your experience.
Ernest
>
> --Michael
>
> ---------------------------------------------------------------------
> | Michael Borland, Ph. D. | Bldg 401/B2201 |
> | Senior Scientist | 9700 S. Cass Avenue |
> | APS Operations Division | Argonne, IL 60439 |
> | Argonne National Laboratory | |
> | [email protected] | (630) 252-4205 office |
> | | (630) 252-5703 FAX |
> ---------------------------------------------------------------------
> http://www.aps.anl.gov/asd/oag/oaghome.shtml
>
> On Thu, 23 Mar 2006, Ernest L. Williams Jr. wrote:
>
> > Hi everyone,
> >
> > Two questions:
> >
> > (1) How many sites used the EPICS AlarmHandler.
> >
> > (2) Has anyone changed the EPICS AlarmHandler to run in daemon mode or
> > as a service?
> >
> > This would be a useful mode when the logging option is used.
> >
> > So, basically we would need a commandline option to enable this and give
> > us an alhLogger, ah?
> >
> >
> >
> >
> > Thanks,
> > Ernest L. Williams Jr.
> > SNS Control Systems Group
> > ORNL
> >
> >
- References:
- AlarmHandler as a daemon or service Ernest L. Williams Jr.
- Re: AlarmHandler as a daemon or service Michael Borland
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