NDLI: Effective Quality-of-Service Policy for Capacity High-Performance Computing Systems

Content Provider	IEEE Xplore Digital Library
Author	Jokanovic, A. Sancho, J.C. Labarta, J. Rodriguez, G. Minkenberg, C.
Copyright Year	2012
Abstract	Current high-performance capacity systems run hundreds of applications concurrently sharing the same network resources. In this scenario, system throughput and hence system utilization is significantly affected by inter-application contention. Quality-of-service (QoS) mechanisms are traditionally used in the Internet to provide different levels of performance guarantees. However, we have not found in the literature the application of QoS techniques to reduce the impact of inter-application contention on contention-sensitive applications running in capacity high-performance computing (HPC) clusters. Only a small set of applications can benefit from the policies currently used. Applications are basically classified into two classes, namely latency-sensitive and bandwidth-sensitive applications. Instead, we propose a more efficient quality-of-service policy for HPC systems with InfiniBand network. This technique provides a wider classification of applications, and hence can leverage QoS mechanisms for a large number of applications resulting in an increase of system performance. The proposed QoS policy provides a method to effectively map applications to virtual lanes and applies effective bandwidth distribution for each of the lanes. Results obtained for slimmed fat-tree networks show that by segregating applications on virtual lanes a substantial reduction of inter-application contention by 59% can be achieved for typical scientific codes. Also, applications can be effectively grouped into one virtual lane based on a network utilization metric in case there are more applications than virtual lanes in the system. Moreover, further improvements are obtained by allocating a different bandwidth to each virtual lane. This technique will favor some applications without significantly degrading the others. We show that for HPC, contrary to Internet, QoS policies should favor applications that are less communication demanding.
Starting Page	598
Ending Page	607
File Size	340342
Page Count	10
File Format	PDF
ISBN	9781467321648
DOI	10.1109/HPCC.2012.86
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-25
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Measurement Quality-of-Service Quality of service Bandwidth Inter-application contention Channel allocation Throughput Internet Network contention InfiniBand interconnect
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

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