Re: SNMP device support

["John A. Priller" <priller@frib.msu.edu>]

Some history of our SNMP driver:

I wrote a modification of the DESY SNMP driver when we got our first 
Wiener/ISEG/MPOD crate a few years back, just to add write support. I 
then undertook a much bigger re-write to give sets priority over reads 
in the transaction queues, as our operators were complaining about how 
unresponsive tuning was.   I was unaware of Sheng Peng's version at the 
time or perhaps I would have started with that.  I haven't dug into it 
to see what it does about prioritization.

At the moment we've got 7 MPOD crates we're using our NSCL/FRIB driver 
with but none are officially "production", they're in beamlines under 
development but they get a decent amount of use with some actual beam.   
I'm always happy to hear how it's working for others!

On 3/19/2013 12:17 PM, Eric Norum wrote:
> I looked at the various SNMP EPICS support modules when we received some Wiener VME crates a couple of months ago and decided that the MSU package from John Priller looked the best for documentation, capabilities and recent support.  I added a few minor changes and it's working well for us now.   The most important change is one that provides a mechanism for long OID strings in INP/OUT fields.  These changes have been folded into the distribution (version 1.0RC6).
>
> On Mar 19, 2013, at 3:19 AM, "Florian Feldbauer" <florian@ep1.ruhr-uni-bochum.de> wrote:
>
> > Dear all,
> >
> > for our low voltage power supply, we are thinking about using the Wiener MPod which is controlled via SNMP.
> >  From Wiener I know that there are some implementations for EPICS:
> > - The original devSNMP from DESY
> > http://www-mks2.desy.de/content/e4/e40/e41/e12212/index_ger.html
> > - An extension of the first one from John Priller
> > http://groups.nscl.msu.edu/controls/
> > - and a third one from Sheng Peng from Diamond light source
> > http://controls.diamond.ac.uk/downloads/misc/snmp.tgz
> >
> > Is there any great difference in those device supports? Especially between the second and third one?
> > Are there any recommendation which one to use?
> >
> > Best regards,
> > Florian
> >
> > --
> > ----------------------------------------
> > | Dr. Florian Feldbauer                |
> > |                                      |
> > | Helmholtz-Institut Mainz /           |
> > | Johannes Gutenberg-Universität Mainz |
> > | Johann-Joachim-Becher-Weg 45         |
> > | D-55128 Mainz                        |
> > |                                      |
> > | Office: 01/217                       |
> > | Phone:  (+49)6131 / 39-25829         |
> > ----------------------------------------

--
John A. Priller            | Phone : (517) 908-7375
MSU Cyclotron Laboratory   | Fax   : (517) 908-7126
640 S. Shaw Lane rm 1300D  | Email : priller@frib.msu.edu
East Lansing, MI 48824     | Web   : http://www.nscl.msu.edu/~priller/