An Architect's vision

• Increase IT responsiveness and efficiency. • Reduce capital expenditures and operational overhead. • Provide greater business flexibility through an on-demand, pay-as-you-go model that scales with your business. • Get more choice in providers — use in-house or third-party vendors. • Free up IT resources for innovation. • Automatic updates • Remote access

The database architecture called shared-disk, which eliminates the need to partition data, is ideal for cloud databases. Shared-disk databases allow clusters of low-cost servers to use a single collection of data, typically served up by a Storage Area Network (SAN) or Network Attached Storage (NAS). All of the data is available to all of the servers, there is no partitioning of the data. As a result, if you are using two servers, and your query takes .5 seconds, you can dynamically add another server and the same query might now take .35 seconds. In other words, shared-disk databases support elastic scalability.

The database architecture called shared-disk, which eliminates the need to partition data, is ideal for cloud databases. Shared-disk databases allow clusters of low-cost servers to use a single collection of data, typically served up by a Storage Area Network (SAN) or Network Attached Storage (NAS). All of the data is available to all of the servers, there is no partitioning of the data.

add - Adds a component to the Oracle Restart configuration. config - Displays the Oracle Restart configuration for a component. disable - Disables management by Oracle Restart for a component. enable - Reenables management by Oracle Restart for a component. getenv - Displays environment variables in the Oracle Restart configuration for a database, Oracle ASM instance, or listener. modify - Modifies the Oracle Restart configuration for a component. remove - Removes a component from the Oracle Restart configuration. setenv - Sets environment variables in the Oracle Restart configuration for a database, Oracle ASM instance, or listener. start - Starts the specified component. status - Displays the running status of the specified component. stop - Stops the specified component. unsetenv - Unsets environment variables in the Oracle Restart configuration for a database, Oracle ASM instance, or listener.

Install the operating system package cvuqdisk. Without cvuqdisk, Cluster Verification Utility cannot discover shared disks, and you receive the error message "Package cvuqdisk not installed" when you run Cluster Verification Utility. Use the cvuqdisk rpm for your hardware (for example, x86_64, or i386). To install the cvuqdisk RPM, complete the following procedure: 1. Locate the cvuqdisk RPM package, which is in the directory rpm on the installation media. If you have already installed Oracle Grid Infrastructure, then it is located in the directory grid_home/rpm. 2. Copy the cvuqdisk package to each node on the cluster. You should ensure that each node is running the same version of Linux. 3. Log in as root. 4. Use the following command to find if you have an existing version of the cvuqdisk package: 5. # rpm -qi cvuqdisk If you have an existing version, then enter the following command to deinstall the existing version: # rpm -e cvuqdisk 6. Set the environment varia...

Check on all the nodes ifconfig -a

Oracle clusterware and ASM now are installed into the Same Oracle Home, and is now called the grid infrastructure install. Raw devices are no longer supported for use for anything (Read oracle cluster registry, voting disk, asm disks), for new installs. OCR and Voting disk can now be stored in ASM, or a certified cluster file system. The redundancy level of your ASM diskgroup (That you choose to place voting disk on) determines the number of voting disks you can have. You can place Only One voting disk on an ASM diskgroup configured as external redundancy Only Three voting disks on an ASM diskgroup configured as normal redundancy Only Five voting disks on an ASM diskgroup configured as high redundancy The contents of the voting disks are automatically backed up into the OCR ACFS (Asm cluster file system) is only supported on Oracle Enterprise Linux 5 (And RHEL5), not on OEL4. There is a new service called cluster time synchronization service that can keep the clocks o...