TAILIEUCHUNG - Using Oracle Clusterware to Protect A Single Instance Oracle Database 11g

Due to its superiority such as low access latency, low en- ergy consumption, light weight, and shock resistance, the success of flash memory as a storage alternative for mobile computing devices has been steadily expanded into personal computer and enterprise server markets with ever increas- ing capacity of its storage. As it has been witnessed in the past several years, two-fold annual increase in the density of NAND flash memory is expected to continue until year 2012 [11]. Flash-based storage devices are now considered to have tremendous potential as a new storage medium that can replace magnetic disk and achieve much higher perfor- mance for enterprise database servers [10]. The trend in. | Using Oracle Clusterware to Protect A Single Instance Oracle Database 11g An Oracle Technical White Paper February 2008 Using Oracle Clusterware to Protect A Single Instance Oracle Database 11g Introduction This paper updates the existing paper Using Oracle Clusterware to Protect a Single Instance Oracle Database This paper alters the way in which Oracle Clusterware must protect the single instance database. The database is no longer being treated as a single resource. It must be failed over together with any other relevant resources. To achieve this the concept of a Resource Group for Oracle Clusterware is explained in this document. A resource group acts as a container for the managed resources. Oracle Clusterware starts all the contained resources on the same node and they are all failed over as a consolidated group dependencies exist between the various resources. A number of dependencies are created when the individual resources are registered with Oracle Clusterware. This guarantees that the order in which Oracle Clusterware starts these processes is correct. One key difference between the original scripts provided for Single Instance protection and these scripts is that they have been made generic. There is no longer any requirement to modify the scripts. Instead as the resources are registered with Oracle Clusterware extra parameters are provided as part of the crs_profile command line. These parameters are stored inside the Oracle Cluster Registry OCR and are specific to the individual resources. Oracle Clusterware then passes those parameters on to the action scripts when invoked. The listener script requires two parameters The location of the listener ORACLE_HOME The name of the listener. The database script requires two parameters The location of the database ORACLE_HOME which can be the same home as the listener The name of the instance. The scripts provided as part of this paper are sample code which can be used to base your own scripts on. These .

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