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

Subject: Channel Archiving
From: john sinclair <sinclair@mail.phy.ornl.gov>
To: tech talk <tech-talk@aps.anl.gov>
Date: Mon, 15 Nov 1999 17:23:10 -0500 (EST)
I have been examining the channel archiver documentation and cannot
determine how to achieve a particular objective; let me explain what
we would like to do.

First, we want to log data at a rate of 1 sample per channel per hour for
examining long term trends. This, of course, is easy to do with the
software.

In addition, we want to log data at a rate of 1 sample per channel every
10 seconds. These samples are used as an event pre-trigger buffer; we do
not want to keep the data for more than a day or so.

I do not see a way to limit the number of files the archiver writes
or a way to manipulate files without destroying the internal pointer
consistency.

Am I missing something simple here? Does anyone else have similar
requirements?


John Sinclair
sinclair@mail.phy.ornl.gov
Oak Ridge National Lab
865-576-6362   865-574-1268 (fax)



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