By Syed Jaffar Hussain, Tariq Farooq, Riyaj Shamsudeen, Kai Yu
Professional Oracle RAC 12c is a hands-on ebook aiding you already know and enforce Oracle actual program Clusters (RAC), and to lessen the total-cost-of-ownership (TCO) of a RAC database. As a pro expert, you're most likely conscious of the significance of figuring out the technical info in the back of the RAC stack. This publication presents deep realizing of RAC thoughts and implementation info for you to follow towards your day by day operational practices. you may be guided in troubleshooting and warding off difficulty on your install. winning RAC operation hinges upon a fast-performing community interconnect, and this booklet dedicates a bankruptcy completely to that extremely important and simply missed subject.
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Additional info for Expert Oracle RAC 12c
Oracle Clusterware was originally introduced in Oracle 9i on Linux with the original name Oracle Clusterware Management Service. 2. Since Oracle 10g, Oracle Clusterware has been the required component for Oracle RAC. On Linux and Windows systems, Oracle Clusterware is the only clusterware we need to run Oracle RAC, while on Unix, Oracle Clusterware can be combined with third-party clusterware such as Sun Cluster and Veritas Cluster Manager. Oracle Clusterware combines a group of servers into a cluster environment by enabling communication between the servers so that they work together as a single logical server.
Log files to identify the root cause for the daemon startup failures. info Chapter 2 ■ Clusterware Stack Management and Troubleshooting This pointer should have been added automatically upon cluster installation and upgrade. In case no pointer is found, add the preceding entry toward the end of the file and as the root user start the cluster manually or initiate the inittab to start up these things automatically. If the ohasd pointer exists, the next thing to check is the cluster high availability daemon auto start configuration.
GPnP profile Clusterware Software Stack Beginning with Oracle 11gR2, Oracle redesigned Oracle Clusterware into two software stacks: the High Availability Service stack and CRS stack. Each of these stacks consists of several background processes. The processes of these two stacks facilitate the Clusterware. Figure 2-2 shows the processes of the two stacks of Oracle 12cR1 Clusterware. info Chapter 2 ■ Clusterware Stack Management and Troubleshooting Oracle Clusterware 12c Technology Stack Cluster Ready Service Technology Stack High Availability Service Technology Stack CRS CSS cssdagent ASM GPNPD GIPC CTSS EVM mDNS mDNS oraagent oraagent scriptagent ONS appagent orarootagent ologgerd osymond orarootagent Figure 2-2.