Storage Volumes and File System Layout

Not Oracle Cloud InfrastructureNot Oracle Cloud at Customer This topic does not apply to Oracle Cloud Infrastructure or to Oracle Cloud at Customer.

This section provides information about the storage volumes and file system layout of a newly created Oracle Database Cloud Service deployment that uses Oracle Real Application Clusters (Oracle RAC) and Oracle Data Guard.

When the database deployment is created, the following Oracle Compute Cloud Service storage volumes are created and attached to the four compute nodes.

Storage Volume Description

boot (four volumes, one for each compute node)

25 GB volume for operating system files, user directories and swap space. This volume appears as the /dev/xvdb block device on each compute node.

bits (four volumes, one for each compute node)

70 GB volume for Oracle Database and Oracle Grid Infrastructure software. This volume appears as the /dev/xvdc block device on each compute node.

data (two volumes, one for each cluster database)

Shared storage for database files. GB size equal to the value provided in the Usable Data Storage field during the database deployment creation process, with a minimum of 15 GB. This volume appears as the /dev/xvdd block device on each compute node.

fra (two volumes, one for each cluster database)

Shared storage for the fast recovery area. GB size depends on the choice of Backup Destination during the database deployment creation process:

  • Both Cloud Storage and Local Storage: GB size equal to 1.7 times the size of the data volume.

  • None: GB size equal to 0.7 times the size of the data volume, with a minimum of 7 GB

This volume appears as the /dev/xvde block device on each compute node.

redo (two volumes, one for each cluster database)

20 GB shared storage volume for redo logs. This volume appears as the /dev/xvdf block device on each compute node.

These storage volumes are mounted on the compute nodes as follows.

File System Mount Description

swap

Swap space; 4 GB allocated from the boot Compute Cloud storage volume.

/ (root)

Operating system files; 16 GB allocated from the boot Compute Cloud storage volume.

/boot

Operating system kernel; 500 MB allocated from the boot Compute Cloud storage volume.

/u01

Oracle product software; the entire bits Compute Cloud storage volume.

/u02

Oracle Database data storage; the entire data Compute Cloud storage volume. An Oracle ASM diskgroup named DATA is created on the storage volume and Oracle ACFS is used to mount it.

/u03

Database backup storage; the entire fra Compute Cloud storage volume. An Oracle ASM diskgroup named FRA is created on the storage volume and Oracle ACFS is used to mount it.

/u04

Database redo logs; the entire redo Compute Cloud storage volume. An Oracle ASM diskgroup named REDO is created on the storage volume and Oracle ACFS is used to mount it.