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Chapter 1 Oracle 10g Grid Computing

Before RAC

Oracle 8i OPS implementation brought in many significant changes. The significant new feature was the introduction of Cache Fusion technology; Cache Fusion is a concept where Cache (or SGA) from the multiple instances coordinate the buffers (or cache) and manage the database access.

Oracle 8i (OPS) introduced the initial phase of cache fusion. The data blocks were transferred from the SGA of one instance to the SGA of another instance without the need to write the blocks to disk. This was aimed at reducing the ‘ping’ overhead of data blocks. However, the partial implementation of cache fusion in Oracle 8i could help only in certain conditions.

With 9i RAC

With full implementation of Cache Fusion technology, the Oracle 9i RAC achieved a scalable and reliable parallel database status. RAC has removed many management issues and simplified installation procedures. Support for the cluster file system, in addition to the raw devices for the shared disk structures have simplified the physical storage administration. Oracle Enterprise Manager has been made cluster aware, and thus helps to better administer the RAC database .

Oracle 9i RAC has revamped the Oracle Parallel Server product and the OPS were aptly renamed as Real Application Cluster, hinting at the true parallel cluster. Table 1.4 summarizes the changes that occurred and new terminology used for RAC system.


For more information, see the book Oracle 11g Grid and Real Application Clusters 30% off if you buy it directly from Rampant TechPress . 

Written by top Oracle experts, this RAC book has a complete online code depot with ready to use RAC scripts.


Remote DBA Services

Burleson Consulting can offer world-class remote Oracle database support at super-affordable prices.

Our remote Oracle DBA service provides 100% of the remote Oracle database administration needs for your company, and includes 24x7 access to our staff of 100% OCP Certified Oracle DBAs. 

We require a 12 month service commitment and include the following services:

  • Initial configuration review and problem identification
  • Installation of Oracle statistics collection mechanisms and quarterly database growth summaries
  • Hourly monitoring of your Oracle database for pending problems
  • Periodic performance analysis & identification of tuning activities
  • Twenty Four hour Oracle emergency support
  • Reporting and resolving all serious Oracle alert log messages
  • Free use of the BC TablePack, ServerPack and AuditPack services
  • Quick response emergency support for production database outages
  • Four hours of free remote DBA support every month. You can use these free hours for any DBA activity, including database analysis, system design, production migrations or personal mentoring.

For more information, please visit www.oracle-training.cc or email info@remote-dba.net.

   
 
 
 

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