You must complete certain operating system tasks on your servers before you install Oracle Grid Infrastructure for a Cluster and Oracle Real Application Clusters.
The values provided in this chapter are for installation minimums only. Oracle recommends that you configure production systems in accordance with planned system loads.
Perform these tasks to gather your current system information.
Use the control panel to check the available RAM on each server.
The minimum required RAM is 4 gigabyte (GB) for Oracle Grid Infrastructure for a Cluster installations, including installations where you plan to install Oracle RAC.
To determine the physical RAM size, for a computer, you can use either of the following methods:
Virtual memory (also known as a paging file) stores information that cannot fit in RAM, the main memory for the computer. All processes share the paging files, and a lack of space in the paging files can prevent processes from allocating memory.
Oracle recommends that you set the paging file size to match the amount of RAM available on the server, up to a maximum of 16 GB. If possible, split the paging file into multiple files on multiple physical devices. This configuration encourages parallel access to virtual memory, and improves the software performance.
To determine whether your computer is running a 64-bit (x64) Windows operating system, perform these steps.
To view your processor type (32-bit or 64-bit), perform these steps.
If the value for System Type is x64-based PC, then you have a 64-bit system.
If the value for System Type is x86-based PC, then you have a 32-bit system.
Additional disk space on a cluster file system is required for the Oracle Grid Infrastructure Management Repository, Oracle Cluster Registry (OCR) and voting files used by Oracle Clusterware.
If you are installing Oracle RAC, then you must configuration additional disk space for:
The Oracle RAC software and log files
The shared data files and, optionally, the shared Fast Recovery Area in an Oracle ASM disk group
If you use standard redundancy for Oracle Clusterware files, which is 3 Oracle Cluster Registry (OCR) files and 3 voting files, then you should have at least 2 GB of disk space available on three separate physical disks reserved for storing the Oracle Clusterware files in Oracle ASM.
Note:You cannot install OCR or voting files (Oracle Clusterware files) on raw partitions. You can install Oracle Clusterware files only on Oracle ASM. Raw devices can be used as Oracle ASM disks.
To ensure high availability of OCR or voting files on Oracle ASM, you need to have at least 2 GB of disk space for Oracle Clusterware files in three separate failure groups, with at least three physical disks. Each disk must have at least 1 GB of capacity to ensure that there is sufficient space to create Oracle Clusterware files.
If the temp space and the Grid home are on the same file system, then add together their respective requirements for the total minimum space required for that file system.
Oracle recommends that you choose the Oracle Grid Infrastructure Management Repository option when installing Oracle Grid Infrastructure. When you choose this option, OUI configures a Oracle Grid Infrastructure Management Repository database on one of the nodes in the cluster.
Starting with Oracle Grid Infrastructure 12c Release 188.8.131.52, installation of the Oracle Grid Infrastructure Management Repository is no longer optional and it is installed automatically.
To determine the amount of available free disk space, there are two methods you can use:
Diskmgmt.mscto open the Disk Management graphical user interface (GUI).
The amount of disk space available in the TEMP directory is equivalent to the total amount of free disk space, minus what is needed to install the Oracle software.
Note:The temporary directory must reside in the same directory path on each node in the cluster.
You must have 1 GB of disk space available in the
TEMP directory. If you do not have sufficient space, then first delete all unnecessary files. If the temporary disk space is still less than the required amount, then increase the partition size of the disk or set the
TEMP environment variable to point to a different hard drive. Ensure the environment variables
TMP both point to the location of the
TEMP directory, for example:
TEMPenvironment variable in the user variables list.
Verify that servers where you install Oracle Grid Infrastructure meet the minimum requirements for installation.
Select servers with the same instruction set architecture as cluster members.
Ensure servers run the same operating system binary.
Oracle Grid Infrastructure installations and Oracle Real Application Clusters (Oracle RAC) support servers with different hardware in the same cluster. Your cluster can have nodes with CPUs of different speeds or sizes, but Oracle recommends that you use nodes with the same hardware configuration.
Oracle recommends that if you configure clusters using different configuration, that you categorize cluster nodes into homogenous pools as part of your server categorization management policy.
See Also:Oracle Clusterware Administration and Deployment Guide for more information about server state and configuration attributes, and about using server pools to manage resources and workloads
Each system must meet certain minimum hardware and memory requirements.
Table 2-1 Minimum Hardware and Memory Requirements for Oracle Grid Infrastructure Installation
Oracle Grid Infrastructure installations: At least 4 gigabyte (GB) of physical RAM for Oracle Grid Infrastructure for a cluster installations, including installations where you plan to install Oracle RAC
Virtual memory (swap)
If your server has between 4 GB and 16 GB of RAM, then you should configure a paging file of at least the same size as the RAM. If your server has more than 16 GB of RAM, then the paging file should be 16 GB.
256 color and at least 1024 x 768 display resolution, so that OUI displays correctly while performing a system console-based installation
x64: Intel Extended Memory 64 Technology (EM64T) or AMD 64
Note:32-bit systems are no longer supported for Oracle Grid Infrastructure and Oracle RAC.
Each system must meet certain minimum storage requirements.
1 GB of space in the
If the free space available in the
%TEMP% directory is less than what is required, then complete one of the following steps:
Delete unnecessary files from the
%TEMP% directory to make available the space required.
Extend the file system that contains the
%TEMP% directory. If necessary, contact your system administrator for information about extending file systems.
At least 7 GB of space for the Oracle Grid Infrastructure for a cluster home (Grid home). Oracle recommends that you allocate 100 GB to allow additional space for patches.
At least 3.5 GB of space for the Oracle base of the Oracle Grid Infrastructure Installation user. The Oracle base includes Oracle Clusterware and Oracle ASM log files.
If you intend to install Oracle Database, then allocate 5.89 GB of disk space for the Oracle home (the location for the Oracle Database software binaries).
If you plan to configure automated database backups for your Oracle Database, then you require additional space either in a file system or in an Oracle Automatic Storage Management disk group for the Fast Recovery Area.
Note:The base directory for Oracle Grid Infrastructure 12c and the base directory for Oracle RAC 12c must be different from the directories used by any Oracle RAC 11g Release 2 installations.
Oracle Database Backup and Recovery User's Guide for more information about Fast Recovery Area sizing
Oracle recommends that you install Oracle software, or binaries, on New Technology File System (NTFS) formatted drives or partitions.
Because it is difficult for OUI to estimate NTFS and file allocation table (FAT) disk sizes on Windows, the system requirements documented in this section are likely more accurate than the values reported on the OUI Summary screen.
Oracle Grid Infrastructure software is not supported on Network File System (NFS).
You cannot use NTFS formatted disks or partitions for Oracle Clusterware files or data files because they cannot be shared. Oracle Clusterware shared files and Oracle Database data files can be placed on unformatted basic disks or disk partitions, called raw partitions, managed by Oracle ASM.
Oracle ASM is recommended for storing Oracle Clusterware and Oracle Database data files.