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<== Date ==> <== Thread ==>

Subject: Re: Channel Access Gateway (Problems at the SLS)
From: "Martin L. Smith" <[email protected]>
To: "Dalesio, Leo `Bob`" <[email protected]>
Cc: [email protected]
Date: Mon, 10 Oct 2005 08:24:40 -0500
I have been administering the PV gateways (40 of them) at the APS
since the beginning of the PV gateway. There have been issues along the
way, however, at this time I feel that for at least the past year the
PV gateways at APS have been performing rather well.

There are currently no problems that I have seen that can be
attributed directly to the current PV gateway (version 2). I have
encountered problems in the past, but there has been nothing to prove
to me that they were being caused by the PV gateway.

Marty Smith


Dalesio, Leo `Bob` wrote:
Hi All,

A change of title would be a bit more precise (as well as sensative).

Airing issues is what a collaboration meeting does best when things are going well. It is a chance to explain what is going wrong for others. It would have been nice to see if anyone else is experiencing any of the reported problems. Is anyone?

Some of the things reported in this talk as bugs are simply the way that the gateway must work to actually limit traffic. For instance, if you connect to the same channel 5 times, one is periodic and the other is moniitor - the monitor is considered to be the most up to date value. If a large MDEL makes the value less useful for the application that wants to do a get - use a smaller MDEL to the gateway. It is fine to point out how a particular tool works in ways that were not expected by the user. It gives others a heads up.

It would be nice to go beyond the imperfect way we communicate and have a list of the issues posted and a response to whether or not the situation is the intentional implementation of the gateway and some pointers on how to get the tool to provide what you want, if the situation is a site specific problem that cannot be reproduced and perhaps some pointers fromt the community on a way to get more diagnostic information to further characterize the problem, and finally isolate anything that is a problem with the gateway so that people with very limited time that have provided very valuable support to the community can provide some help.

We have precedent for having these people come to your site and help you to diagnose the issue. This is normally done at the expense of the site requesting support. Even though it may be a problem in the code authored elsewhere, it is really important to remember that these are very large codes, supported almost entirely at the expense of some other project.

Bob




References:
Channel Access Gateway (Problems at the SLS) Dalesio, Leo `Bob`

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