By Steve Shaw, Julian Dyke
Step-by-step advisor for fitting 10g RAC on Linux. proceed to take advantage of it as a reference while fitting 11g RAC on Solaris 10 because the utilities are all of the comparable.
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Additional resources for Pro Oracle Database 10g RAC on Linux: Installation, Administration, and Performance (Expert's Voice in Oracle)
Other businesses have consolidated their database operations to a single global location that serves customers and employees around the world. These environments do not enjoy the luxury of regular maintenance windows. Applications and databases must be available at all times. RAC databases require a considerable additional investment in hardware, licenses, and management. Therefore, most sites only consider RAC for applications that must be highly available. Many customers initially considering purchasing the RAC option are interested in the increased scalability potentially offered by the option (covered in the next section).
The licenses may cost significantly more than comparable single-instance systems. So why are so many users interested in implementing RAC? Most users implement RAC to achieve either higher availability, greater scalability, or a combination of these. Other users implement RAC to simplify database management or to reduce the cost of ownership of their database systems. This section discusses the advantages and disadvantages of each of the perceived benefits of RAC. CHAPTER 1 INTRODUCTION TO RAC Cost of Ownership Advantages and Benefits Many users adopt RAC in order to reduce their overall IT cost structure.
The cost of the new RAC licenses provided a disincentive for existing OPS users to upgrade. This in turn meant that there were relatively few early RAC adopters with experience in running clustered databases. The RAC option is supported on a number of platforms, including Sun Solaris, Hewlett-Packard HP-UX and Tru64, IBM AIX, Microsoft Windows, and Linux. However, earlier versions of Linux lacked two features that are essential in a clustered environment: a cluster manager, and a clustered file system.