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

Subject: CA client (on IOC) question
From: Ralph Lange <Ralph.Lange@bessy.de>
To: EPICS Core Talk <core-talk@aps.anl.gov>
Date: Tue, 08 Aug 2006 12:56:33 +0200
Hello Core,

looking at bad things happening and logs from our network switches it seems that the CA client that runs on the IOC does a name resolve request whenever any record with a link pointing into nirwana (aka an unconnected link) is being processed. Example: on IOC1, there are 100 records (scanned at 10 Hz) pointing to 100 other records sitting on IOC2. As soon as IOC2 is down, IOC1 broadcasts a name resolution request for those 100 channels 10 times a second.

Is that true? Is that smart?

Confused,
Ralph
(trying to find out why a single IOC going halfway down drives _all_ our IOCs into 95+ percent of cpu usage)


Replies:
Re: CA client (on IOC) question Andrew Johnson
RE: CA client (on IOC) question Jeff Hill

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