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Oracle RAC xxx

Oracle RAC Cluster Tips by Burleson Consulting

This is an excerpt from the bestselling book Oracle Grid & Real Application Clusters.  To get immediate access to the code depot of working RAC scripts, buy it directly from the publisher and save more than 30%.

Introduction to Oracle RAC and Grid

In this chapter, some key concepts of Grid Computing and the enabling technologies being introduced by Oracle, the leading Database vendor, will be introduced.

Today, Information Technology plays a vital role in shaping and conducting businesses all over the globe. With the explosive growth of computer dependent operations for its core and competitive advantage, commercial government and non-profit organizations are quite sensitive to the changes occurring in technology and as well the economics of its use.

In the last two decades, there has been a steady growth of server technology and, at the same time, many changes in its form and architecture.

Mainframes, Minis and powerful work-stations gave way to Server Clusters. Networking of computers is now reaching a new echelon with the advent of Grid Computing.

Parallel to the changes occurring in server technology space, business data accumulation has reached a new high. Structured business data stored in relational databases is the single most important asset for many enterprises. Most of the critical and non-critical operations depend on and make use of the information kept in databases. Databases have grown in size and complexity. To support large and scalable databases, the server platform and the associated storage and network technology have had to keep pace with these growing databases.

In research oriented projects, computer technology is now put to maximum use. Many varied applications such as drug discovery, operations research, electronic CAD, ecological modeling and Monte Carlo simulations are now driven by powerfully distributed computers.

Different architectures, centralized and de-centralized collaborative forms of computer infrastructure, are actively used.

Grid Computing is an emerging infrastructure that aims to provide a mechanism for sharing and coordinating the use of diverse computing resources. The word ?Grid? is used as an analogy with the electric power grid, which provides pervasive access to electricity. As Grid Computing makes long strides and impacts many organizations in the IT world with its utility-like access to computational resources, the question remains; can Grid Computing become something like the Electric Grid of the 20th century. While the state of Grid Computing is still in its infancy, there are definite signs of comparison, argues Rajkumar Buyya and Madhu Chetty.

Grid Computing is very well positioned to change the computing landscape in terms of the economics of computing. It can dramatically lower the cost of computing and extend the availability of computing resources.

As the time passes, Grid Computing, which was earlier mostly confined to research organizations and specific projects, is gradually making in-roads into commercial and business organizations. More and more IT vendors are formulating their Grid strategy and offering new solutions aimed at participating in this emerging computing era. Large IT vendors such as IBM, HP, Intel, Oracle, Sun and Dell have contributed to the growth of grid computing standards and to the realization of Grid goals and vision.

As such, this book is not about Grid Technology and Grid Concepts per se. The focus is more on Oracle?s Presence in Grid Space. There are good textbooks that deal more eloquently on the vision and concept of Grid Computing. In this book, Grid Concepts and detailed accounts of Oracle provided grid-enabling technologies will be presented. Oracle?s flagship grid-enabling product, Oracle Real Application Cluster (RAC), will be covered in detail. Oracle RAC is a Parallel Database server which is based on the shared disk model. Shared Disk is accessed by multiple nodes in the cluster configuration.

Oracle RAC database is an aggregation of Oracle Database Instances, thereby enhancing database computing power. This architecture provides a truly scalable and highly available framework to meet and support complex and large databases needed for the critical business and scientific operations. Oracle database instance is an accumulation of memory structures.

This is an excerpt from the bestselling book Oracle Grid & Real Application Clusters, Rampant TechPress, by Mike Ault and Madhu Tumma.

You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts.



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