NDLI: Extensive experimentation with eACID

Content Provider	IEEE Xplore Digital Library
Author	Hussain, S. Qadir, M.A.
Copyright Year	2009
Description	Author affiliation: Center for Distributed and Semantic Computing, Mohammad Ali Jinnah University, Islamabad, Islamabad, Pakistan (Hussain, S.; Qadir, M.A.)
Abstract	Fault monitoring is one of the main activities of fault tolerant distributed systems. It is required to determine the suspected /crashed component and proactively take the recovery steps to keep the system alive. The main objective of the fault monitoring activity is to quickly and correctly identify the faults. A fault monitoring system which is quick to declare faults increases the chances of false alarms, i.e., declaration of a fault which is actually not a fault. Therefore, an ideal fault monitoring system needs to be as quick as possible in identification of faults without increasing the false alarms. Fault monitor typically detects faults by sending and receiving messages to remote objects and observing the time intervals between a message and its response. One of the major responsibilities of the monitor is to adapt these intervals according to the dynamic network and system conditions, and set them very close to the actual delays in the system. The adaptation of the delays, timeout and monitoring intervals, must not fluctuate with large amplitudes around the actual delays. Otherwise, the number of false alarms would increase or the identification of faults will be delayed. The adaptation should converge to the actual delays very fast. Adaptation of the monitoring interval in the same way as time outs adapt can not be defended. Sometimes, a distributed system (network or other components) may have abrupt change in their state for a very short duration (the transient behavior), the fault monitoring system should bypass these transients behavior, and otherwise the decisions taken on transients will have to be changed to other state very quickly which will add extra overheads both in taking the decision and then reverting it back. Our algorithm with the name of eACID (enhanced Adaptive Convergent Intelligent fault monitoring in Distributed systems), when compared with the best known algorithm, ADAPTATION [Sotama et al.], yielded 16% less false timeouts and 9% more utilization of responses. eACID adapts the timeout on the previous history which gives us a fair idea about the work load and we use it to our advantage. Our scheme does not take decisions on transient behaviors of the system.
Starting Page	377
Ending Page	382
File Size	449280
Page Count	6
File Format	PDF
ISBN	9781424456307
DOI	10.1109/ICET.2009.5353142
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-19
Publisher Place	Pakistan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	adaptation Computer crashes Distributed computing Delay timeout benchmark fault detectors Fault diagnosis Condition monitoring Fault detection Fault tolerant systems Detectors Object detection fault monitoring Remote monitoring
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in