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ifi-tr-92.23                   (available electronically as electra.ps.Z)

"The ELECTRA Approach to Object Oriented Distributed Programming"

Building reliable distributed software is difficult. 
In this paper we describe abstractions which help the
programmer in developing such software systems by means of object
oriented programming in C++. An object oriented toolkit called ELECTRA
is presented, which provides abstractions for remote method
calling, type secure object group communication, synchronization 
and other facilities. The paper also exemplifies how distributed
software can be developed in ELECTRA using the class library, 
the location-trader and the stub generator that are part of the toolkit.

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cache_management.ps.Z          (available electronically as cache_management.ps.Z)

"Cache Management Algorithms for Flexible Filesystems"

Cache management in flexible filesystems deals with the problem of
determining a cached file to be replaced when the local cachespace is 
exhausted.
In analogy to virtual memory management, several different algorithms exist
for managing cached files. In this paper we simulate the behavior
of First-In-First-Out (FIFO), Least Recently Used (LRU) , Least Frequently 
Used (LFU) and a variation of LFU we call the File Length Algorithm (LEN)
from the viewpoint of file access times, cache hit ratios and availability. 
The results of several simulation runs are presented and interpreted.

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1. through anonymous ftp from ftp.ifi.unizh.ch [130.60.48.8] in pub/techreports.
   Log in as "anonymous", use your email address as your password, specify
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2. Order paper copies from: 
   Institut fuer Informatik, Universitaet Zuerich, Frau Kerstin Reiher,
   Winterthurerstr. 190, CH-8057 Zuerich, Switzerland
   
Questions: tr@ifi.unizh.ch


-- 
Silvano Maffeis       CS Dept. University of Zurich, Switzerland
   RFC822: maffeis@ifi.unizh.ch            voice: +411 257 43 27
   X.400: /S=maffeis/OU=ifi/O=unizh/PRMD=SWITCH/ADMD=ARCOM/C=CH/
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