Experimental Physics and
Industrial Control System

[email protected] · Fri, 23 Feb 96 12:01:01 -0500

>>In addition it would help if any write action to the IOC's could be logged on a 
>>file. This would help to keep track and analyse problems. This would need an 
>>output channel from the CA-server on the IOC to a (i.e.) NFS-mounted disk.
>>The output would look like:
>>date time user@machine changed record from value to value
>
>This must of been discussed in the past.  Sorry if this is a rehash.

Yes, this is something I asked about 2 years ago -- a "write hook" to catch all
external writes to the database (which would catch all operator changes).  But I
prefer to do server side logging so that poorly behaved clients can't interfere
with the data integrity.  As to the knobbing problem, it is simple enough to 
implement something to collapse repeated writes to the same channel into a
single log output. (see also: previous discussions of err logging and filtering
repeating error messages).

Chip

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System