NDLI: Real-world performance modelling of enterprise service oriented architectures:delivering business value with complexity and constraints (abstracts only)

Content Provider	ACM Digital Library
Author	Brebner, Paul C.
Abstract	Performance and Scalability Modelling of real-world enterprise systems is challenging due to both the complexity and size of the system being modelled, and constraints imposed by real projects such as the need to provide business value, deadlines, and the accessibility, relevance, quality and quantity of available documentation and performance data. Our hypothesis is that enterprise Service Oriented Architectures (SOAs) are more amenable to performance modelling as services are more granular, visible, and measurable. Since 2007 we have developed, trialled and refined a method with model-driven tool support for directly modelling the performance and scalability of increasingly complex Service Oriented Architectures. This paper reports an illustrative experience modelling a large-scale production SOA Enterprise Service Bus (ESB) upgrade, focussing on lessons learnt related to the complexity and constraints of modelling in the real-world. The key observations are that model construction is a type of theory formation and therefore: (1) Models (functioning as theories) can be simple but powerful enough to model large complex SOAs within the boundaries of real project constraints; (2) Model formation can be incremental, starting with a simple model (as simple theories are easier to refute) and refining as required; (3) Building multiple competing models can be a useful approach if information is inadequate or ambiguous, as the rival models can be tested with the aim of discarding incorrect ones; (4) If insufficient information is available to build a single "über" model to answer all the performance questions, it is often possible to build multiple specialised models for different purposes.
Starting Page	12
Ending Page	12
Page Count	1
File Format	PDF
ISSN	01635999
DOI	10.1145/2160803.2160813
Journal	ACM SIGMETRICS Performance Evaluation Review (PERV)
Volume Number	39
Issue Number	3
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-01-10
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture 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
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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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