Traces Synchronization in Distributed Networks
Joint Authors
Dagenais, Michel R.
Clément, Eric
Source
Journal of Computer Networks and Communications
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-07-20
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Information Technology and Computer Science
Abstract EN
This article proposes a novel approach to synchronize a posteriori the detailed execution traces from several networked computers.
It can be used to debug and investigate complex performance problems in systems where several computers exchange information.
When the distributed system is under study, detailed execution traces are generated locally on each system using an efficient and accurate system level tracer, LTTng.
When the tracing is finished, the individual traces are collected and analysed together.
The messaging events in all the traces are then identified and correlated in order to estimate the time offset over time between each node.
The time offset computation imprecision, associated with asymmetric network delays and operating system latency in message sending and receiving, is amortized over a large time interval through a linear least square fit over several messages covering a large time span.
The resulting accuracy is such that it is possible to estimate the clock offsets in a distributed system, even with a relatively low volume of messages exchanged, to within the order of a microsecond while having a very low impact on the system execution, which is sufficient to properly order the events traced on the individual computers in the distributed system.
American Psychological Association (APA)
Clément, Eric& Dagenais, Michel R.. 2009. Traces Synchronization in Distributed Networks. Journal of Computer Networks and Communications،Vol. 2009, no. 2009, pp.1-11.
https://search.emarefa.net/detail/BIM-988562
Modern Language Association (MLA)
Clément, Eric& Dagenais, Michel R.. Traces Synchronization in Distributed Networks. Journal of Computer Networks and Communications No. 2009 (2009), pp.1-11.
https://search.emarefa.net/detail/BIM-988562
American Medical Association (AMA)
Clément, Eric& Dagenais, Michel R.. Traces Synchronization in Distributed Networks. Journal of Computer Networks and Communications. 2009. Vol. 2009, no. 2009, pp.1-11.
https://search.emarefa.net/detail/BIM-988562
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-988562