NDLI: An optimal atomic broadcast protocol and an implementation framework

Content Provider	IEEE Xplore Digital Library
Author	Ezhilchelvan, P. Palmer, D. Raynal, M.
Copyright Year	2003
Description	Author affiliation: Dept. of Comput. Sci., Newcastle Univ., NSW, Australia (Ezhilchelvan, P.; Palmer, D.)
Abstract	Atomic broadcast (where all processes deliver broadcast messages in the same order) is a very useful group communication primitive for building fault-tolerant distributed systems. This paper presents an atomic broadcast protocol that can be claimed to be optimal in terms of failure detection, resilience, and latency. The protocol requires only the weakest of the useful failure detectors for liveness, and permits up to (n-1)/2 processes to crash in a system of n processes; at most two communication steps and n broadcasts are needed in a run during which process crashes and failure-suspicions do not occur. We also introduce the notion of notifying broadcast which can reduce the message overhead further in 'nice' runs in which all processes are operational and communication delays do not exceed the bound assumed. If nice runs persist, the average message overhead is just one broadcast. That is, the protocol extracts no message overhead for providing crash-tolerance if process failures and unanticipated fluctuations in communication delays do not occur. We are currently implementing our protocol as a CORBA (Common Object Request Broker Architecture) component. All known ORBs use IIOP as the standard protocol for inter-process communication, which in turn uses TCP/IP (transmission control protocol/Internet protocol) as the common transport protocol. It turns out that the notifying broadcast is easy to implement on top of the TCP transport layer.
Sponsorship	IEEE Tech. Committee on Distriubted Process. IFIP WG 10.4 on Dependable Comput. OMG
Starting Page	32
Ending Page	39
File Size	391688
Page Count	8
File Format	PDF
ISBN	0769519296
DOI	10.1109/WORDS.2003.1218063
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-01-17
Publisher Place	Mexico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Broadcasting Transport protocols Delay Computer crashes TCPIP Fault tolerant systems Resilience Detectors Fluctuations Communication standards
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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