> > - Clients are free to specify any desired value as the monitor
> > deadband, as long as the corresponding pv is triggering and its
> > primitive type is a number.
> > - On successful connection to a pv, the server may suggest related pvs
> > that contain suitable deadbands such as the corresponding MDEL and
> > ADEL fields, if such fields exist.
>
> Only the server tool can decide on its own when its data has changed, and
> therefore an event should be posted. Otherwise, we are forced to poll the
> data from the server and introduce additional overhead and also
> propagation delays.
>
> It is however desirable in future versions to allow the client to specify
> a wider deadband than what is used by the server tool to decide if its PV
> has changed. This is already on the list.
How do you propose implementing this for IOC databases ?
The decision for whether to post a monitor is made by the record, not by
the server.
How do you handle a client that requests a *smaller* deadband than the one
defined in the record ? Are you suggesting that records always post
monitors and let the server decide whether to actually send them out ?
Sounds like it could be a real performance hit.
We use custom records that implement multiple MDEL- and ADEL-like fields,
which we of course had to define new names for.
How would that be supported ?
----
Brian McAllister Controls Programmer/Beam Physicist
[email protected] MIT-Bates Linear Accelerator
(617) 253-9537 Middleton, MA
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