NDLI: Always On: Architecture for High Availability Cloud Applications

Content Provider	IEEE Xplore Digital Library
Author	Anand, M.
Copyright Year	2012
Abstract	With the shift towards cloud computing, application availability becomes a valid concern. Cloud applications have to be taken down to address various hardware and software problems. Even thoug redundancy insulates applications from hardware errors, the software updates and patches still require the service to be taken down for the period of the update. Organizations generally use lowactivity hours to do software updates. This paper proposes architecture for constructing high-availability cloud applications that can be updated without shutting down the service. The paper discusses how the various components of application can be structured into request receiver nodes and request processor nodes. Request receivers receive the request and request processors act on the request. We provide a mechanism of detecting whether any worker or responder node is not working optimally and allow user to save the state and restart this particular node. Finally we present scenarios wherein these nodes can be upgraded either individually or in batches. This reduces dependency on administrators and operations engineers in data center thereby reducing the cost. The reduced cost can directly benefit cost sensitive emerging markets. Furthermore this improves the service level agreement (SLA) since the application will not have to be taken down for updates.
Starting Page	1
Ending Page	5
File Size	417695
Page Count	5
File Format	PDF
ISBN	9781467344210
e-ISBN	9781467344227
e-ISBN	9781467344203
DOI	10.1109/CCEM.2012.6354593
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-11
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cloud computing Receivers Computer architecture Routing Hardware 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

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