Transaction Processing in Large Database Systems

TP Monitor

Presented by Jin Fei Yin, Shuai Liu

Transaction processing in large database The role of transaction processing monitors

Topics

Transactions Properties ---> ensure Reliability

Transaction processing monitors (Purpose & Architecture)

Three popular monitor products(features and benefits) - Tuxedo from BEA Systems - Microsoft Transaction Server - CICS from IBM

Criteria for choosing/applying TPM

Overview

* DefinitionA program that monitors a transaction as it passes from one stage in a process to another. (Operating System for TP)

* Functionality1) Manage the transfer of data 2) Manage applications programs that serve data 3) Guarantee all databases are updated as a single unit

E.g. Tour agency

Transaction processing (TP) monitor

* Purpose - ' Manage transactions from their point of origin, on the client, across one or more servers and then back to the original client '

- 'ensure the ACID properties of transactions'

Transaction processing (TP) monitor (Cont'd)

Application architecture that use a transaction processing monitor consists of three parts

1) A graphic interface layer(on client's computer)2) An application layer(on numerous separate application servers)3) A data layer(on separate database servers)

Architecture of the application system

Architecture of the application system (cont'd)

Solving problems regarding to high volumes of transactions - airline reservations, security systems - customer service, order/delivery process systems

Efficient & Effective Managment - Using resources efficiently(lower hardware requirements) - Reduced downtimes(increased profits)

Higher Scalablity - Building systems with three-tier architecture (development and maintenance time is reduced)

TPM - Utility & Merit

Case Study

Product Origin Features CompatibilityTuxedo(BEA)

administrate online e-commerce transaction processing systems

C, C++, CORBA C++, C#, Visual BasicTCP/IP, Java

MTS(MS) support for transactions to be easily implemented in other applications

distributed SQL transaction support through application code

Microsoft Visual Basic, Visual C++, Visual J++

CICS(IBM)

provide transaction processing for IBM mainframes

screen displays developments seperated from terminal knowledge

COBOL, C, C++, Java

CostsResource compatibility: compatible with current resourcesPlatform support: supports the existing platformInternet support: If requiredStaff expertise: compatible with familiar PLUsability: easy to learn and useCompany future: maintenance & upgrading

TPM - Choosing Criterion

a) Efficiency lies in managing processes with very high volume of transactions

b) Not reasonable to apply toSystems with few users/low drain on processes

TPM - Utility Scope

The uses of TPM within a large database systemo Serviceo Architectureo Products Comparisono Criteriao Scope

Summary

References• BEA Systems 2006, BEA Tuxedo® 9.1, viewed 29 September 2006,

http://www.bea.com/framework.jsp?CNT=features.htm&FP=/content/products/tux/• Begg,C & Connolly, T 2002, Database Systems: A Practical Approach to Design, Implementation, and Management, Pearson Education,

England.• Carnegie Mellon Software Engineering Institute, Client/Server Software Architectures: An Overview, viewed 23 September 2006,

http://www.sei.cmu.edu/str/descriptions/clientserver_body.html• IBM 2006, CICS: Customer information control system, viewed 25 September 2006, http://www-306.ibm.com/software/htp/cics/• Krakowiak, S 2003, What is middleware, viewed 22 September 2006, http://middleware.objectweb.org/• Kroenke, D 2004, Database Processing: Fundamentals, Design, and Implementation, Pearson Education, New Jersey.• Micromax Information Services 1999, 'TP Monitors', viewed 28 September 2006, http://n-tier.com/articles/tp.html• Microsoft 2006, MTS Documentation, viewed 30 September 2006,

http://windowssdk.msdn.microsoft.com/en-us/library/ms704722.aspx• Nance, W 1997, Balance the load with Transaction Server, viewed 24 September 2006, http://www.byte.com/art/9706/sec6/art1.htm• Pachowicz, P, 'Client/Server Architectures and Applications', viewed 23 September 2006, http://teal.gmu.edu/~ppach/sp06/TCOM510-

Part-1.ppt• Plew,R & Stephens, R 2003, Sams Teach Yourself SQL in 24 Hours, Sams Publishing• Skeen, D, Unblocking commit protocols, University California, viewed 26 September 2006,

http://delivery.acm.org/10.1145/590000/582339/p133-skeen.pdf?key1=582339&key2=6273669511&coll=&dl=ACM&CFID=15151515&CFTOKEN=6184618

• Strahl, M, Using Microsoft Transaction Server with VFP, viewed 22 September 2006, http://www.west-wind.com/presentations/mts/mts.htm

04/19/23