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From: rys@inf.ethz.ch (Michael Rys)
Newsgroups: comp.sys.sequent
Subject: File caching algorithms of the Sequent Symmetry (DYNIX)
Message-ID: <29142@neptune.inf.ethz.ch>
Date: 3 Jun 91 11:07:29 GMT
Sender: news@neptune.inf.ethz.ch
Reply-To: rys@inf.ethz.ch (Michael Rys)
Organization: ETH, Zurich
Lines: 13

I have to time some parallel algorithms which heavily depend on file access.
To measure the real impact of an unbuffered file access, I would like to know
how the file cache works for a Sequent Symmetry under DYNIX 3.0.17 (12 proc).
Is the replacement strategy LRU, LFU? Global, per user or per processor? 

FYI: I am using the uSystem library of UofWaterloo for file handling.

Any information is greatly appreciated.

Michael Rys
Inst. fuer Informationssysteme
Fachgruppe Datenbanken
ETH Zuerich