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Data Replication

1997-03-10 Computers
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Release : 1997-03-10
Genre : Computers
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Data Replication by : Marie Buretta

Download or read book Data Replication written by Marie Buretta. This book was released on 1997-03-10. Available in PDF, EPUB and Kindle. Book excerpt: For enterprise-wide data replication that works, you'll find the right tools for the right job--right here Data Replication: Tools and Techniques for Managing Distributed Information is a step-by-step guide to replicated data implementation, covering everything from technologies and terms to design approaches used by major vendors like IBM and Sybase to the latest in alternative design strategies. Here's everything on selecting the right set of replication tools and designing and building databases that work effectively with these tools. In addition, the book provides: * Clear data distribution methodology and tips and techniques for designing databases that use replication efficiently * A work plan for building an in-house framework for replication * An application developer's work plan for implementing replication * Highlighted "Tips" and "Warnings" and a Decision * Tree that offers easy selection of the best replication alternatives * Concepts applicable to both vendor-supplied and in-house solutions * Illustrative case studies on such topics as using replication within the OLAP operational data store, and OLTP and mobile computing environments

Smarter Business: Dynamic Information with IBM InfoSphere Data Replication CDC

2012-03-12 Computers
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Release : 2012-03-12
Genre : Computers
Kind : eBook
Book Rating : 372/5 ( reviews)

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Book Synopsis Smarter Business: Dynamic Information with IBM InfoSphere Data Replication CDC by : Chuck Ballard

Download or read book Smarter Business: Dynamic Information with IBM InfoSphere Data Replication CDC written by Chuck Ballard. This book was released on 2012-03-12. Available in PDF, EPUB and Kindle. Book excerpt: To make better informed business decisions, better serve clients, and increase operational efficiencies, you must be aware of changes to key data as they occur. In addition, you must enable the immediate delivery of this information to the people and processes that need to act upon it. This ability to sense and respond to data changes is fundamental to dynamic warehousing, master data management, and many other key initiatives. A major challenge in providing this type of environment is determining how to tie all the independent systems together and process the immense data flow requirements. IBM® InfoSphere® Change Data Capture (InfoSphere CDC) can respond to that challenge, providing programming-free data integration, and eliminating redundant data transfer, to minimize the impact on production systems. In this IBM Redbooks® publication, we show you examples of how InfoSphere CDC can be used to implement integrated systems, to keep those systems updated immediately as changes occur, and to use your existing infrastructure and scale up as your workload grows. InfoSphere CDC can also enhance your investment in other software, such as IBM DataStage® and IBM QualityStage®, IBM InfoSphere Warehouse, and IBM InfoSphere Master Data Management Server, enabling real-time and event-driven processes. Enable the integration of your critical data and make it immediately available as your business needs it.

Specification and Analytical Evaluation of Heterogeneous Dynamic Quorum-Based Data Replication Schemes

2012-04-24 Computers
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Release : 2012-04-24
Genre : Computers
Kind : eBook
Book Rating : 813/5 ( reviews)

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Book Synopsis Specification and Analytical Evaluation of Heterogeneous Dynamic Quorum-Based Data Replication Schemes by : Christian Storm

Download or read book Specification and Analytical Evaluation of Heterogeneous Dynamic Quorum-Based Data Replication Schemes written by Christian Storm. This book was released on 2012-04-24. Available in PDF, EPUB and Kindle. Book excerpt: Data replication by employing quorum systems is an important concept to improve operation availability on data objects in distributed systems that have strong data consistency demands. These data replication schemes must be modeled and carefully evaluated with respect to different quality measures. Christian Storm addresses the former by a uniform data replication scheme specification method and realizes the latter by a comprehensive approach to the analytical evaluation of quorum-based data replication schemes. The system model allows to evaluate operation availability and other quality measures for the write as well as for the read operation.

InfoSphere Data Replication for DB2 for z/OS and WebSphere Message Queue for z/OS: Performance Lessons

2012-12-22 Computers
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Release : 2012-12-22
Genre : Computers
Kind : eBook
Book Rating : 952/5 ( reviews)

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Book Synopsis InfoSphere Data Replication for DB2 for z/OS and WebSphere Message Queue for z/OS: Performance Lessons by : Miao Zheng

Download or read book InfoSphere Data Replication for DB2 for z/OS and WebSphere Message Queue for z/OS: Performance Lessons written by Miao Zheng. This book was released on 2012-12-22. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the impact of workload and database characteristics on the performance of both DB2®, MQ, and the replication process is useful for achieving optimal performance.Although existing applications cannot generally be modified, this knowledge is essential for properly tuning MQ and Q Replication and for developing best practices for future application development and database design. It also helps with estimating performance objectives that take these considerations into account. Performance metrics, such as rows per second, are useful but imperfect. How large is a row? It is intuitively, and correctly, obvious that replicating small DB2 rows, such as 100 bytes long, takes fewer resources and is more efficient than replicating DB2 rows that are tens of thousand bytes long. Larger rows create more work in each component of the replication process. The more bytes there are to read from the DB2 log, makes more bytes to transmit over the network and to update in DB2 at the target. Now, how complex is the table definition? Does DB2 have to maintain several unique indexes each time a row is changed in that table? The same argument applies to transaction size: committing each row change to DB2 as opposed to committing, say, every 500 rows also means more work in each component along the replication process. This RedpaperTM reports results and lessons learned from performance testing at the IBM® laboratories, and it provides configuration and tuning recommendations for DB2, Q Replication, and MQ. The application workload and database characteristics studied include transaction size, table schema complexity, and DB2 data type.

Database Replication

2022-05-31 Computers
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Release : 2022-05-31
Genre : Computers
Kind : eBook
Book Rating : 397/5 ( reviews)

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Book Synopsis Database Replication by : Bettina Kemme

Download or read book Database Replication written by Bettina Kemme. This book was released on 2022-05-31. Available in PDF, EPUB and Kindle. Book excerpt: Database replication is widely used for fault-tolerance, scalability and performance. The failure of one database replica does not stop the system from working as available replicas can take over the tasks of the failed replica. Scalability can be achieved by distributing the load across all replicas, and adding new replicas should the load increase. Finally, database replication can provide fast local access, even if clients are geographically distributed clients, if data copies are located close to clients. Despite its advantages, replication is not a straightforward technique to apply, and there are many hurdles to overcome. At the forefront is replica control: assuring that data copies remain consistent when updates occur. There exist many alternatives in regard to where updates can occur and when changes are propagated to data copies, how changes are applied, where the replication tool is located, etc. A particular challenge is to combine replica control with transaction management as it requires several operations to be treated as a single logical unit, and it provides atomicity, consistency, isolation and durability across the replicated system. The book provides a categorization of replica control mechanisms, presents several replica and concurrency control mechanisms in detail, and discusses many of the issues that arise when such solutions need to be implemented within or on top of relational database systems. Furthermore, the book presents the tasks that are needed to build a fault-tolerant replication solution, provides an overview of load-balancing strategies that allow load to be equally distributed across all replicas, and introduces the concept of self-provisioning that allows the replicated system to dynamically decide on the number of replicas that are needed to handle the current load. As performance evaluation is a crucial aspect when developing a replication tool, the book presents an analytical model of the scalability potential of various replication solution. For readers that are only interested in getting a good overview of the challenges of database replication and the general mechanisms of how to implement replication solutions, we recommend to read Chapters 1 to 4. For readers that want to get a more complete picture and a discussion of advanced issues, we further recommend the Chapters 5, 8, 9 and 10. Finally, Chapters 6 and 7 are of interest for those who want get familiar with thorough algorithm design and correctness reasoning. Table of Contents: Overview / 1-Copy-Equivalence and Consistency / Basic Protocols / Replication Architecture / The Scalability of Replication / Eager Replication and 1-Copy-Serializability / 1-Copy-Snapshot Isolation / Lazy Replication / Self-Configuration and Elasticity / Other Aspects of Replication

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