NDLI: Design Patterns for Internet-Scale Services

Content Provider	IEEE Xplore Digital Library
Author	Jinquan Dai
Copyright Year	2009
Abstract	There are dramatic differences between delivering software as services in the cloud for millions to use, versus distributing software as bits for millions to run on their PCs.First, "the data center is the computer". Services are developed to run on distributed data centers for high scalability, high availability and low latency. The data centers have a scale-out shared-nothing architecture (made up of thousands of independent, unreliable servers) and are distributed in geography. In addition, there is also a move to many small, cheap, independent and flaky data centers for cost and energy effectiveness. Therefore, the service needs to be programmed to have its data set to be partitioned and spread around independent servers, and to be replicated across independent servers and data centers.Second, "the application is always offline". Despite increasingly ubiquitous wireless connectivity, clients will be occasionally disconnected. In addition, due to increasingly ubiquitous service compositions and data integrations (e.g., SOA, mashup and widget), remote services or data will be occasionally unavailable to the applications (either in the cloud or on the clients). Consequently, the application needs to be programmed to work with an assumption that it is always offline, by making progress based on its local states as much as possible, and by interacting with remote partners asynchronously to reconcile their states.Therefore, Internet-scale services need new design patterns and programming models for the partitioned data set with many copies that are changed independently. This is a huge software challenge. Big websites spend 70% of their efforts on undifferentiated heavy lifting (e.g., partitioning, replication and scaling) versus 30% on differentiated value (feature) creation. This talk will review the challenges for Internet-scale services and some of the emerging solutions to address those challenges, based on our experience in building Internet-scale service platforms as well as the industry best practices.
Starting Page	1759
Ending Page	1759
File Size	215568
Page Count	1
File Format	PDF
ISBN	9781424434220
ISSN	10844627
DOI	10.1109/ICDE.2009.152
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-29
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Web and internet services Service oriented architecture Availability Data models Distributed computing Uncertainty Clouds Scalability Computer architecture Application software Computing M Service Cloud Computing Design Patterns Data Model
Content Type	Text
Resource Type	Article
Subject	Signal Processing Information Systems Software

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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