NDLI: Towards distributed storage resource management using flow control

Content Provider	ACM Digital Library
Author	Ahmad, Irfan Gulati, Ajay
Abstract	Deployment of shared storage systems is increasing with rapid adoption of virtualization technologies to provide flexible sharing, isolation, better management and high utilization of resources. Quality of service (QoS) in such environments is quite desirable for meeting IO demands of virtual machines. The lack of QoS support at typical storage arrays, simultaneous access by multiple hosts and concerns regarding under-utilization of resources makes this problem quite challenging. In this paper, we study the problem of providing fairness among hosts accessing a storage array in a distributed manner while maintaining high efficiency. Towards this goal, we investigate whether local latency estimates at each host can be used to detect overload and whether limiting host issue queue lengths can provide fairness across hosts. In principle, the approach is similar to mechanisms used by TCP at each host for flow control. Initial experiments and simulation results for control mechanism provide encouragement to develop a complete framework.
Starting Page	10
Ending Page	16
Page Count	7
File Format	PDF
ISSN	01635980
DOI	10.1145/1453775.1453779
Journal	ACM SIGOPS Operating Systems Review (OPSR)
Volume Number	42
Issue Number	6
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1975-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Io scheduling Flow control Disrtributed storage management
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Information Systems

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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