We present the design, implementation and evaluation of a
fully open-source, production-quality load-sharing and highly
available system, to address the problem of offering continously
available and reliable Internet services.
The proposed architecture is built on top of established open-source
technologies, like the FreeBSD Operating System, the Packet Filter
(PF), the Common Address Redundancy Protocol (CARP) and Python. Our
solution is complemented with a comprehensive and highly configurable
administration shell that coordinates the function
of the underlying system.
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Otenet
Kostas Zorbadelos is a Systems Developer. He is currently
with Otenet SA, the leading ISP in Greece, in its Systems and Services
Section. He is a UNIX and open source advocate. His scientific and
professional interests include systems administration, systems
evaluation and design of highly available and scalable internet
services. He holds a MSc and a BS in Computer Science from the
University of Athens, Greece, Department of Informatics and
Telecommunications.
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Otenet
Christos KK Loverdos is a Software Engineer, currently with Otenet SA.
His professional and research interests range from Digital Typesetting
to Programming Languages and Service-Oriented Computing. He likes
building flexible software and seeking ways to do so.
He was a member of the core team that lead the design and implementation
of the Athens 2004 Olympic Portal infrastructure (www.athens2004.com).
He holds an MSc and a BS in Computer Science from the
University of Athens, Greece, Department of Informatics and
Telecommunications.
One can view his homepage at www.ckkloverdos.com
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University of Athens
Alex Delis is a faculty member at the University of Athens, in Athens,
Greece. His research interests are in the areas of distributed
computing, real-time systems, networked databases, and evaluation of
computer systems. He holds a PhD and an MS in Computer Science from
the University of Maryland at College Park, MD and a diploma in
Computer Engineering from the University of Patras, in Patras,
Greece. He is a member of IEEE Computer Society, ACM, and the
Technical Chamber of Greece.
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