Grid Technology Overview
Grid computing combines computers from multiple administrative domains to reach a common goal, to solve a single task and may then disappear just as quickly.
One of the main strategies of grid computing is to use middleware to divide and apportion pieces of a program among several computers, sometimes up to many thousands. Grid computing involves computation in a distributed fashion, which may also involve the aggregation of large-scale cluster computing-based systems.
Oracle Enterprise Manager Grid Control
For managing lots of databases and application servers (according to Oracle Corporation, preferably in a grid solution) one could use the Oracle Enterprise Manager Grid Control. It can manage multiple instances of Oracle deployment platforms; the most recent edition also allows for management and monitoring of other platforms such as Microsoft .NET, Microsoft SQL Server, NetApp Filers, BEA weblogic and others. Partners and IT organizations can build extensions to Oracle Enterprise Manager, and make them available to other Enterprise Manager users via Oracle Enterprise Manager 10g Grid Control Extensions Exchange. System monitoring:
Enterprise Manager provides comprehensive, flexible, easy-to-use monitoring functionality that supports the timely detection and notification of impending IT problems to the intended users. It offers the most comprehensive monitoring from Oracle Database instances to Oracle Real Application Clusters to Oracle Application Server Farms and Clusters. OEM Grid Control comes with a comprehensive set of performance and health metrics that allow monitoring of key components in your environment such as applications, application servers, databases, as well as the back-end components on which they rely, such as hosts, operating systems and storage.
The architecture of the OEM for Grid Control has three distinct components:
- the collection agent (Oracle Management Agent or OMA)
- the aggregation agent (Oracle Management Server or OMS)
- the repository agent (Oracle Management Repository or OMR)
The OMA runs on the target host and collects information on the hardware, operating system, and applications that run on the target. The OMS runs on one or two servers and collects the data generated by the OMAs. The OMS pulls the information from the OMAs and aggregates the collections into the repository. The OMS also acts as the user-interface — by generating web-pages for database administrators to view the status of systems and services. The OMR comprises an instance of the Oracle database that stores the data collected by the OMS. Installers can make the OMR highly available or fault-tolerant by running it on an Oracle RAC instance across multiple nodes.
Key features of OEM Grid Control:
- System Monitoring
- Managing Groups
- Job System
- Information Publisher
- Compliance Management
- Extending Enterprise Manager
- Managing Targets
Before starting to install the Oracle Grid you need to download from the below mention link.
Oracle Grid 22.214.171.124.0
Kindly extract the three files into the same folders. if not then you will receive the error (figure 1.5)
I assume, you have already installed the below mention items.
- Oracle Database (11g R2)
- Oracle WebLogic Server. (10.3.2) this version of Weblogic server is compatible with 11g Grid. otherwise you have faced error (figure 1.4)
If not installed, then please go through the with below mention links.
Some important prerequisites need to be check before installing Oracle Grid 11g (126.96.36.199.0)
- Partitioning option is installed in the database. other wise error (figure 1.0)
- After installing Oracle 11g Database you need to deactivate the DB control using the below mention command. other wise error (figure 1.1)
emca -deconfig dbcontrol db -repos drop
- alter the value of session_cached_cursors must be equal to or greater than 200. other wise error (figure 1.2)
- alter the value of log_buffer must be equal to or greater than 10485760.
- alter the value of processes must be equal to or greater than 500.
- alter the tablespace size atleast 200 MB. other wise (figure 1.3)
After applying the above mention changes then you restart the database.
Now we are ready to install the Oracle Grid 11g.
Click on the setup file.
remove the checkbox and click Next.
Click on ignore All check box and then Next.
enter Weblogic username and password / nodemanager password then click Next.
Enter database information and click Next.
Please check the prerequisites. If you follow the prerequisites step then you will not faced those errors.
Enter SYSMAN password and click Next.
Enter Registration password, click on both the check box and click Next
Check the port and click Next.
Click Next to start installation.
Configuration in process.
Oracle Grid Installation completed. please save the necessary information into the notepad and click Close.
Weblogic running with Oracle Grid Control.
If you have any query, feel free to ask.
Lot more to come…………….