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Overload Protection for CORBA Systems with Time Constraints

Författare:
Publiceringsår: 2002
Språk: Engelska
Publikation/Tidskrift/Serie: NetRG Publications
Dokumenttyp: Rapport
Förlag: [Publisher information missing]

Sammanfattning

Scalable and reliable distributed object-oriented computing (DOC) middleware

systems is an important technology in, for example, telecommunications service

logic and distributed web servers. The Common Object Request Broker Architecture

(CORBA), developed by the Object Management Group (OMG) is a speci

cation of a common platform for DOC systems. CORBA acts as middleware,

by inserting itself between the Operating System (OS) layer and the Application

layer on a host. CORBA provides support for transparent interaction of objects

situated on different nodes. The original CORBA specications had no support

for timing constraints in applications and very little support in the terms of performance

optimizations. Present extension to CORBA include support for real-time

applications and a number of performance enhancements such as load balancing.

However, no work so far address the issue of overload in a CORBA system. This

paper presents a discussion of overload issues in distributed CORBA systems with

time-constrained tasks. First a performance model of a CORBA system is introduced.

Second, overload in distributed CORBA systems is discussed. Third, a

number of classic overload protection mechanisms are applied to the performance

model and investigated using simulation. The simulations show that even by using

very simple protection mechanism, a good throughput can be achieved.

Nyckelord

  • Communication Systems
  • Electrical Engineering, Electronic Engineering, Information Engineering

Övriga

Published
  • Tele- och datakommunikationssystem: Performance Analysis of distributed Applications
  • Tele- och datakommunikationssystem-lup-obsolete

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