In a standard Oracle configuration, a database can only be mounted by one instance but in a RAC environment, many instances can access a single database. These servers are inter-connected and cooperate as a single system. system and Oracle RAC software is the same as with a physical installation. Oracle Real Application clusters allow multiple instances to access a single database, the instances will be running on multiple nodes. Oracle Database Standard Edition Oracle Database Standard Edition delivers the unprecedented ease of use, power, and performance of Standard Edition One, with support for larger machines and clustering of services with Oracle Real Application Clusters (Oracle RAC). Real Application Clusters provide high availability because of the failover of connections in the event of a hardware failure or server connection failure. Oracle® Real Application Clusters Administration and Deployment Guide 12c Release 1 (12.1) E48838-12 July 2017 The advantage of Oracle RAC is that resources on both nodes are used by the database, and each node uses its own memory and CPU. • Deploying an Oracle RAC Database 12c Release 1 (12.1.0.2.0) with shared SAN disks • Using Oracle ASM disks with udev rules • Securing the Oracle RAC Database 12c environment with SELinux 1 Oracle Database 12c – supported on version 12.1.0.2.0 or higher on Red Hat Enterprise Linux 7 refarch-feedback@redhat.com 1 www.redhat.com Oracle® Database 2 Day + Real Application Clusters Guide 11g Release 2 (11.2) E17264-15 July 2014 [1]Oracle® Real Application Clusters Administration and Deployment Guide 11g Release 2 (11.2) E41960-04 June 2015 Storage layout guidelines for Oracle Database on VMware technology, with respect to the number of LUNs and maximizing I/O performance, are the same as with a physical installation. [1]Oracle® Real Application Clusters Installation Guide 11g Release 2 (11.2) for Microsoft Windows x64 (64-Bit) E48195-02 February 2015 RAC is the principal component for the Oracle Grid Architecture.It’s an option to the Oracle Database that provides High Availability (HA) and scalability to the Oracle Database without requiring any application changes.. From a system point of view, a group of independent servers defines a cluster. • Joel.Goodman@oracle.com • Application Development and Support 1976 to 1982 • Software Development and Consultancy 1983 to 1986 • IT Training Mainframe Technology 1986 to 1993 • Oracle Support 1994 to 1996 • Oracle University 1997 to Present • OCP DBA 1997 to Present -Releases 7.3 to 10g • Oracle 9i OCM DBA from 2002 10g from 2006 Oracle Maximum Availability Architecture Oracle RAC Database aware Applications – A Developer’s Checklist Page 3 of 22 Introduction This document is intended to be a checklist for Developers who expect their applications to run on Oracle Real Application Clusters (RAC) database. Oracle Database - Standard Edition - Version 19.6.0.0.0 to 21.1 [Release 19 to 20.0]: Desupport of Oracle Real Application Clusters (RAC) with Oracle Database Standa Oracle RAC is not included in the Standard Edition of releases Changes in Oracle Real Application Clusters 12c Release 1 (12.1) xxx 1 Introduction to Oracle RAC 1.1 Overview of Oracle RAC 1-1 1.2 Overview of Installing Oracle RAC 1-3 1.2.1 Understanding Compatibility in Oracle RAC Environments 1-4 1.2.2 Oracle RAC Database … Information is shared between nodes through the interconnect—the virtual private network.
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