Share Email Print
cover

Proceedings Paper

Introducing high performance distributed logging service for ACS
Author(s): Jorge A. Avarias; Joao S. López; Cristián Maureira; Heiko Sommer; Gianluca Chiozzi
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The ALMA Common Software (ACS) is a software framework that provides the infrastructure for the Atacama Large Millimeter Array and other projects. ACS, based on CORBA, offers basic services and common design patterns for distributed software. Every properly built system needs to be able to log status and error information. Logging in a single computer scenario can be as easy as using fprintf statements. However, in a distributed system, it must provide a way to centralize all logging data in a single place without overloading the network nor complicating the applications. ACS provides a complete logging service infrastructure in which every log has an associated priority and timestamp, allowing filtering at different levels of the system (application, service and clients). Currently the ACS logging service uses an implementation of the CORBA Telecom Log Service in a customized way, using only a minimal subset of the features provided by the standard. The most relevant feature used by ACS is the ability to treat the logs as event data that gets distributed over the network in a publisher-subscriber paradigm. For this purpose the CORBA Notification Service, which is resource intensive, is used. On the other hand, the Data Distribution Service (DDS) provides an alternative standard for publisher-subscriber communication for real-time systems, offering better performance and featuring decentralized message processing. The current document describes how the new high performance logging service of ACS has been modeled and developed using DDS, replacing the Telecom Log Service. Benefits and drawbacks are analyzed. A benchmark is presented comparing the differences between the implementations.

Paper Details

Date Published: 19 July 2010
PDF: 10 pages
Proc. SPIE 7740, Software and Cyberinfrastructure for Astronomy, 77403G (19 July 2010); doi: 10.1117/12.857289
Show Author Affiliations
Jorge A. Avarias, National Radio Astronomy Observatory (United States)
Joao S. López, Univ. Técnica Federico Santa María (Chile)
Cristián Maureira, Univ. Técnica Federico Santa María (Chile)
Heiko Sommer, European Southern Observatory (Germany)
Gianluca Chiozzi, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 7740:
Software and Cyberinfrastructure for Astronomy
Nicole M. Radziwill; Alan Bridger, Editor(s)

© SPIE. Terms of Use
Back to Top