If you create multiple disk groups for storage, then you can choose to place files in different disk groups. If you create only one disk group for storage, then the OCR and voting disk files, database files, and recovery files are contained in the one disk group. Use different disk groups for each file type. Use the same Oracle ASM disk group for data files and recovery files. Place the data files in the same disk group as the Oracle Clusterware files. If you create multiple disk groups before installing Oracle RAC or before creating a database, then you can decide to do one of the following: If you install Oracle Database or Oracle RAC after you install Oracle Grid Infrastructure, then you can either use the same disk group for database files, OCR, and voting disk files, or you can use different disk groups. Note that with Oracle Database 11g release 2 (11.2) and later releases, Oracle Database Configuration Assistant (DBCA) does not have the functionality to create disk groups for Oracle ASM. After the Oracle Grid Infrastructure installation, you can create additional disk groups using ASMCA, SQL*Plus, or ASMCMD. On new installations, using disks is not supported by Oracle Automatic Storage Management Configuration Assistant (ASMCA) or Oracle Universal Installer (OUI), but is supported by the software if you perform manual configuration.ģ.1.4 Guidelines for Using Oracle ASM Disk Groups for Storageĭuring Oracle Grid Infrastructure installation, you can create one disk group. Raw disks are supported only when upgrading an existing installation using the disks already configured. If you intend to use Oracle ASM with Oracle RAC, and you are configuring a new Oracle ASM instance, then your system must meet the following conditions:Īll nodes on the cluster have Oracle Clusterware and Oracle ASM 11 g release 2 (11.2) installed as part of an Oracle Grid Infrastructure for a cluster installation.Īny existing Oracle ASM instance on any node in the cluster is shut down. Oracle recommends that you choose Oracle ASM as the storage option for database and recovery files.įor Standard Edition Oracle RAC installations, Oracle ASM is the only supported storage option for database or recovery files. You can choose any combination of the supported storage options for each file type provided that you satisfy all requirements listed for the chosen storage options. Use the following guidelines when choosing the storage options to use for each file type: Oracle ACFS provides a general purpose file system for other files.ģ.1.3.2 General Storage Considerations for Oracle RAC You cannot put Oracle Database files on Oracle ACFS. You cannot put Oracle Clusterware binaries and files on Oracle ACFS. You can place Oracle ACFS database home file systems into the Oracle ACFS mount registry, along with other registered Oracle ACFS file systems. You must manually mount and unmount Oracle ACFS file systems, after the Oracle ASM instance is running You must manually load and unload Oracle ACFS drivers. For this reason, the following restrictions apply if you run Oracle ACFS on an Oracle Restart Configuration Oracle Restart does not support root-based Oracle Clusterware resources. You can place Oracle Database binaries on this system, but you cannot place Oracle data files or Oracle Clusterware files on Oracle ACFS. Oracle Automatic Storage Management Cluster File System (Oracle ACFS) provides a general purpose file system. Note that if you intend to use a cluster file system for your data files, then you should create partitions large enough for the database files when you create partitions for Oracle Clusterware.ģ.1.2 General Information About Oracle ACFS General Parallel File System (GPFS): A cluster file system for AIX that provides concurrent file accessĪ supported cluster file system. Only one Oracle ASM instance is permitted for each node regardless of the number of database instances on the node.Ī supported shared file system: Supported file systems include the following: It performs striping and mirroring of database files automatically. It is an integrated, high-performance database file system and disk manager for Oracle Clusterware and Oracle Database files. Oracle ASM is the required database storage option for Typical installations, and for Standard Edition Oracle RAC installations. Oracle Automatic Storage Management (Oracle ASM): You can install Oracle Clusterware files (OCR and voting disks) in Oracle ASM diskgroups. There are two ways of storing Oracle Clusterware files: 3.1.1 Overview of Oracle Clusterware and Oracle RAC Storage Options
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