NDLI: Llama: Distributed Multi-versioned Model Data Management for SCADA

Content Provider	IEEE Xplore Digital Library
Author	Jie, Wen Jiao, Dai Jizhong, Han Fangchun, Di Hu, Yan
Copyright Year	2014
Abstract	In Supervisory Control and Data Acquisition (SCADA) systems, it is of great significance maintaining all Model versions for tracking, diagnosing and recovering from the system shutdown. With the Model data increasing rapidly, traditional relational databases are not capable to cover the scalability issue, thus there comes up the more scalable NoSQL stores. However, integration to NoSQL brings up several new challenges: firstly NoSQL have little capacity on schema management of structured data, secondly Model has many versions but changes little, which lead to much unwanted redundancy, lastly, SQL supported on NoSQL could lead to a decline in access performance. We propose Llama, a distributed multi-versioned Model data management architecture to fix these problems. Llama provides general schema management to manage the schemas and attributes of structured data in NoSQL. Incremental version maintenance and time aggregation compression strategies are applied to reduce the average storage overhead. Furthermore, Llama reaches the current hot spot version Model with low-latency, with it cached in memory and write penetration implemented. Experiments show that the average storage overhead is reduced to 20% in Llama, and the read speed of hot spot is more than 10 times faster.
Starting Page	1968
Ending Page	1973
File Size	465382
Page Count	6
File Format	PDF
e-ISBN	9781479979813
DOI	10.1109/CSE.2014.359
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-12-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Write Penetration Multi-versioned Model Scalability Redundancy Schema Management SCADA systems Storage Optimization Relational databases Maintenance engineering Data models SCADA
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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