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Subject: Re: gateway throttling events?
From: Gasper Jansa <gasper.jansa@cosylab.com>
To: Chris Timossi <catimossi@lbl.gov>
Cc: epics <tech-talk@aps.anl.gov>
Date: Tue, 08 Jan 2008 14:25:15 +0100
Hi Chris

The reason for this is that gateway no longer posts events with log event mask if 'archive' option is not used.
I can see that this can be interpreted as wrong behavior. It could be changed in a way that if 'archive' option is not used the gateway should posts all events with value/log mask which means that archiver would get all value changes dictated by MDEL and ADEL would be ignored.


Best Regards
Gasper

Chris Timossi wrote:

I'm using the latest version of the gateway with EPICS base 3.14.9 together with the Channel Archiver as a client. I'm curious why the Archiver records so much less data through the gateway than it does archiving the IOC data directly. I'd expect some difference, but it seems like the Archiver hardly sees any value-change events through the GW.


I'm looking at about 1000 PVs with the MDELs set such that events should be coming in at a high rate; in fact, the GW clientEventRate is 5000hz. But the archiver is missing almost all the value changes (though it does seem to catch severity changes). I'm using the 'no_cache' option but it doesnt make any difference.
I'm purposely not using the 'archive' option. I dont remember the older CA GW behaving this way.


Chris Timossi
Advanced Light Source
Lawrence Berkeley Laboratory





Replies:
Re: gateway throttling events? Janet Anderson

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