4 Configuring Operating Systems for Oracle Grid Infrastructure on Linux

Complete operating system configuration requirements and checks for Linux operating systems before you start installation.

• Guidelines for Linux Operating System Installation
  Operating system guidelines to be aware of before proceeding with an Oracle installation.
• Reviewing Operating System and Software Upgrade Best Practices
  These topics provide general planning guidelines and platform-specific information about upgrades and migration.
• Reviewing Operating System Security Common Practices
  Secure operating systems are an important basis for general system security.
• About Installation Fixup Scripts
  Oracle Universal Installer detects when the minimum requirements for an installation are not met, and creates shell scripts, called fixup scripts, to finish incomplete system configuration steps.
• About Automatic Self Correction
  Automatic Self Correction feature provides resiliency to Oracle Grid Infrastructure by automatically identifying and correcting without user intervention for any fixable configuration issues found within the cluster.
• About Operating System Requirements
  Depending on the products that you intend to install, verify that you have the required operating system kernel and packages installed.
• Operating System Requirements for x86-64 Linux Platforms
  The Linux distributions and packages listed in this section are supported for this release on x86-64.
• Additional Drivers and Software Packages for Linux
  Information about optional drivers and software packages.
• Checking Kernel and Package Requirements for Linux
  Verify your kernel and packages to see if they meet minimum requirements for installation.
• Setting Clock Source for VMs on Linux x86-64
  Oracle recommends that you set the clock source to tsc for better performance in virtual environments (VM) on Linux x86-64.
• Installing the cvuqdisk RPM for Linux
  If you do not use an Oracle Database Preinstallation RPM, and you want to use the Configuration Verification Utility, then you must install the cvuqdisk RPM.
• Reviewing HugePages Memory Allocation
  Review this information if your operating system has HugePages enabled.
• Setting Transparent HugePages to madvise
  Transparent HugePages memory is enabled by default with Oracle Linux. However, for optimal performance, Oracle recommends that you set Transparent HugePages to madvise on all Oracle Database servers UEK7 and later kernels and not disable Transparent HugePages as was recommended in prior releases.
• Enabling the Name Service Cache Daemon
  To allow Oracle Clusterware to better tolerate network failures with NAS devices or NFS mounts, enable the Name Service Cache Daemon (nscd).
• Verifying the Disk I/O Scheduler on Linux 8 and Later Systems
  Disk I/O schedulers reorder, delay, or merge requests for disk I/O to achieve better throughput and lower latency.
• Using Automatic SSH Configuration During Installation
  To install Oracle software, configure secure shell (SSH) connectivity between all cluster member nodes.
• Setting Network Time Protocol for Cluster Time Synchronization
  You can use operating system configured network time protocol (NTP) such as chronyd or ntpd for time synchronization.
• Verifying Digital Signature and Integrity of Installation Archive Files
  Starting with Oracle Database 23ai, Oracle digitally signs the installation archive files with Oracle certificates to ensure the integrity of the packages before you deploy them in your environments.