The Oracle RAC option with Oracle Database enables you to cluster Oracle databases. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so they operate as a single system. Oracle Clusterware is a portable cluster management solution that is integrated with Oracle Database. Oracle Clusterware is a required. Oracle RAC databases differ architecturally from non-cluster Oracle databases in that each Oracle RAC database instance also has: At least one additional thread of redo for each instance An instance-specific undo tablespace
Main Oracle RAC Components
Oracle Clusterware and Oracle Real Application Clusters (RAC) are Oracle's strategic high availability and resource management database framework in a cluster environment, and an integral part of the Oracle MAA Silver reference architecture. A Real Application Clusters (RAC) Database has multiple database Instances hosted on a RAC Cluster. These instances access a single set of Database files on Shared Storage. Frequently the Shared storage is provided by an ASM instance local to the node hosting the RAC database instance. OracleRealApplicationClusters (RAC)is an option to theOracleDatabasethatprovides highavailability(HA)and scalability totheOracleDatabasewithout requiringany applicationchanges.Thereis noother solutioninthemarketthatprovides allthefeatures as OracleRAC. Enterprisestoday continuetogeneratemoreandmoredataat anunprecedentedpace. In database computing, Oracle Real Application Clusters ( RAC) — an option [1] 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.
RAC Architecture Oracle 12c INTERMEDIATE Skillsoft
Oracle Real Application Clusters (RAC) allow customers to run a single Oracle Database across multiple servers in order to maximize availability and enable horizontal scalability, while accessing shared storage. Overview of Oracle RAC Architecture and Processing1-18. Understanding Cluster-Aware Storage Solutions1-18. Oracle RAC and Network Connectivity 1-19 Overview of Using Dynamic Database Services to Connect to Oracle Databases 1-20 Overview of Virtual IP Addresses 1-20 Oracle Database 19c implements major improvements in the RAC architecture that enable applications to achieve many times better availability and scalability than just a few years ago. Together, these improvements create a new generation of Oracle RAC technology that is ready to meet the needs of next generation workloads and applications. Oracle Real Application Clusters (Oracle RAC) enables an Oracle database to run across a cluster of servers, providing fault tolerance, performance, and scalability with no application changes necessary. Oracle RAC provides high availability for applications by removing the single point of failure with a single server.
oracle technology lovers blog Oracle RAC Basics
Overview of Oracle RAC Architecture and Processing Overview of Automatic Workload Management Overview of Installing Oracle RAC Overview of Managing Oracle RAC Environments Overview of Oracle RAC A cluster comprises multiple interconnected computers or servers that appear as if they are one server to end users and applications. Technical Article A guide for defining, designing, and delivering a successful Oracle RAC project. Oracle Real Application Clusters (RAC) is the premier database clustering solution in the RDBMS market space. Oracle RAC's configuration options and features offer companies a wide range of flexibility for designing their high-availability solutions.
Check loss and recovery of OCR and voting disks. Remove a node from the cluster. Add a node to the cluster. Practice patches/upgrades of the installation. You should try rolling and non-rolling patches. Practice backup/recovery of a RAC database. Block media recovery. Datafile and tablespace recovery. The overall architecture of Oracle Real Application Cluster is as follows. The requirements for the RAC Installation are as follows. 1- Two or More Servers: They can be both Physical server and Virtual machine. It is recommended using Linux or Unix instead of Windows for the Oracle RAC installation.
Oracle DBA Quick Notes Oracle 10g Database Architecture............
Oracle RAC enables you to cluster an Oracle database. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so they operate as a single system. Oracle Clusterware is a portable cluster management solution that is integrated with Oracle Database. Oracle Clusterware is also a required component for using Oracle RAC. A Reference Architecture for Implementing an Oracle RAC Database on Oracle Servers, Switches, and SAN Storage Hardware 1. After Linux is installed, install Oracle FS Path Manager. For detailed instructions, consult the Oracle FS Path Manager Release 4 Installation Guide for Linux. 2. Configure HugePages.
