Oracle RAC Training
In database computing, Oracle Real Application Clusters (RAC) — an option for the Oracle Database software produced by Oracle Corporation and introduced in 2001 with Oracle9i — provides software for clustering and high availability in Oracle database environments. Oracle Corporation includes RAC with the Enterprise Edition, provided the nodes are clustered using Oracle Clusterware.
Oracle RAC allows multiple computers to run Oracle RDBMS software simultaneously while accessing a single database, thus providing clustering.
In a non-RAC Oracle database, a single instance accesses a single database. The database consists of a collection of data files, control files, and redo logs located on disk. The instance comprises the collection of Oracle-related memory and background processes that run on a computer system.
In an Oracle RAC environment, 2 or more instances concurrently access a single database. This allows an application or user to connect to either computer and have access to a single coordinated set of data. The instances are connected within each other through an “Interconnect” which enables all the instances to be in sync in accessing the data.
Real Application Clusters harnesses the processing power of multiple interconnected computers. Real Application Clusters software and a collection of hardware known as a cluster unite the processing power of each component to create a robust computing environment.
Real Application Clusters is a breakthrough cluster software architecture with scalability and high availability features that exceed the capabilities of previous Oracle cluster-enabled software products. Real Application Clusters offers significant advantages for all system types. With the increased functionality of Real Application Clusters, all systems and applications can efficiently exploit clustered environments.
The Benefits of Real Application Clusters
Lower Overall Cost of Ownership
Real Application Clusters lowers the overall cost of ownership more effectively than other cluster database products. This is due in great part to the single-system image afforded by the Real Application Clusters architecture.
A scalable environment enables you to improve performance and add capacity by adding nodes. On some platforms you can add nodes dynamically while your cluster is running.
High availability refers to systems with redundant components that provide consistent, uninterrupted service, even during failures. In most high availability configurations, nodes are isolated from each other so that a failure on one node does not affect the entire system.
The concept of transparency implies that Real Application Clusters environments are functionally equivalent to single-instance Oracle database configurations. In other words, you do not need to make code changes to deploy applications on Real Application Clusters if your applications ran efficiently on single-instance Oracle configurations.
Buffer Cache Management
Oracle stores resources, such as data block information, in a buffer cache that resides in memory. Storing this information locally reduces database operations and disk I/O. Because each instance has its own memory, Real Application Clusters coordinates the buffer caches of multiple nodes while minimizing disk I/O.
Oracle row locking and multi-version read consistency provide a high degree of concurrency and throughput. Row locking ensures that transactions that modify different rows in the same data block do not need to wait for each other to commit.
Multiversion Read Consistency
Multiversion read consistency ensures that read operations do not block write operations and that write operations do not block read operations. Multiversion read consistency creates snapshots or read consistent versions of blocks that have been modified by a transaction that has not committed.
Recovery Manager, Online Backups, and Archiving
Real Application Clusters supports the full functionality of Recovery Manager (RMAN) and Oracle Enterprise Manager. Real Application Clusters also supports all Oracle backup and archiving features that are available in single-instance Oracle databases.
Focus Training Services Provides Oracle RAC Training with highly experienced trainers.
We are focusing to fill the gap of industry requirement and available resources.
at Focus Training Services we give hands on practice training on Oracle RAC and helps students to understand the complete Oracle Database and RAC
Our Training Programs –
- Oracle RAC
- Oracle DBA +RAC
Our Oracle Database Experts
Our RAC Experts
Mr. Siddharth Reddy
- More than 25 years of experience in training and development.
- worked with Oracle Technologies.
- 100+ Corporate training
- Trained 5000+ Candidates
Our RAC Experts
Mr. Innamullah Khan
- More than 17 years of experience in training and development.
- worked with HCL & Cognizant.
- 50+ Corporate training.
- Trained 5000+ Students