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Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Introduction to Oracle Automatic Storage Management

About Oracle ASM FilesAllocation Units Every Oracle ASM disk is divided into allocation units (AU). An allocation unit is … allocation units. An Oracle ASM file consists of one or more file extents. When you create a disk group … , you can set the Oracle ASM allocation unit size with the AU_SIZE disk group attribute. The values … \"Disk Group Compatibility\".

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Considerations for Oracle ASM Storage

Oracle ASM and Multipathingof data availability through automatic failover and failback. Although Oracle ASM is not designed … with multipathing functionality, Oracle ASM does operate with multipathing technologies. Multipathing … storage products With Oracle ASM, you can ensure the discovery of a multipath disk by setting the … it and provides load balancing

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Introduction to Oracle Automatic Storage Management

About Oracle ASM InstancesAn Oracle ASM instance is built on the same technology as an Oracle Database instance. An Oracle … ASM instance has a System Global Area (SGA) and background processes that are similar to those of … Oracle Database. However, because Oracle ASM performs fewer tasks than a database, an Oracle ASM SGA is … much smaller

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Disk Groups

Oracle ASM Disk DiscoveryDisk discovery is the mechanism used to find the operating system names for disks Oracle ASM can

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Files, Directories, and Templates

Inside /sys/asmThe Oracle ASM virtual folder is created by default during XML DB installation. If the database is … not configured to use Oracle ASM, the folder is empty and no operations are permitted on it. The … Oracle ASM virtual folder contains folders and subfolders that follow the hierarchy defined by the … structure of an Oracle ASM

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Managing Oracle ASM InstancesThis section describes how to administer Oracle ASM instances under the following topics … : Administering Oracle ASM Instances with Server Control Utility Using Oracle Restart Starting Up an Oracle ASM … Instance Shutting Down an Oracle ASM Instance Upgrading an Oracle ASM Instance in an Oracle Restart

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Introduction to Oracle Automatic Storage Management

Understanding Oracle ASM ConceptsThis section describes concepts for the key Oracle ASM components and it contains the following … topics: About Oracle ASM Instances About Oracle ASM Disk Groups About Mirroring and Failure Groups … About Oracle ASM Disks About Oracle ASM Files For information about preparing your storage environment

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Files, Directories, and Templates

About Oracle ASM FilenamesEvery file created in Oracle ASM is provided a filename generated by Oracle Managed Files, known as … a complete path name in the Oracle ASM file system. An example of a fully qualified filename is … (read or retrieve) an Oracle ASM file. You can also use other abbreviated filename formats, such as an … alias Oracle ASM

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Introduction to Oracle Automatic Storage Management

About Oracle ASM DisksOracle ASM disks are the storage devices that are provisioned to Oracle ASM disk groups. Examples … of Oracle ASM disks include: A disk or partition from a storage array An entire disk or the … can assign an Oracle ASM disk name or Oracle ASM assigns the Oracle ASM disk name automatically.

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Disk Groups

Oracle ASM Storage LimitsOracle ASM provides near unlimited capacity for future growth, but does have some storage limits … . For example, Oracle ASM has the following limits on the number of disk groups, disks, and files: 63 … disk groups in a storage system 10,000 Oracle ASM disks in a storage system 1 million files for each … disk group Without any

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Oracle ASM Configuration Assistant

ASMCA CommandsASM Instance Upgrade an Oracle ASM Instance Configure Parameters for an Oracle ASM Instance Delete … Oracle ASM Instances Create a Disk Group Add a Disk to a Disk Group Create a Volume Create an Oracle ACFS File System

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Oracle ASM Configuration Assistant

Table 11-3 Options for the -configureParameter commandUpgrade an Oracle ASM Instance - upgradeASM upgrades an Oracle ASM instance from a previous release … to the current software release. Upgrading an Oracle ASM instance with ASMCA only updates the … Oracle ASM instance software and does not configure Oracle Clusterware or the listener. An Oracle ASM

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Configuring Initialization Parameters for Oracle ASM InstancesThis section discusses initialization parameter files and parameter settings for Oracle ASM … instances. To install and initially configure an Oracle ASM instance, use Oracle Universal Installer (OUI … ) and Oracle ASM Configuration Assistant (ASMCA). Refer to your platform-specific Oracle Grid … Infrastructure Installation Guide

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Downgrading an Oracle ASM Instance in an Oracle Restart ConfigurationThis section discusses the process to downgrade an Oracle ASM instance that has been upgraded to an … Oracle ASM instance is downgraded as part of the Oracle Clusterware downgrade. If you are making any … Oracle ASM The following procedure describes how to downgrade an Oracle ASM instance from Oracle 11 g … release

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Active Session History Sampling for Oracle ASMActive Session History sampling is now available on Oracle ASM instances. This activity is exposed … pack license for the Oracle ASM instance. See Also: Oracle Database Performance Tuning Guide for

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

About Privileges for Oracle ASMDuring Oracle ASM installation, you can use one operating system group for all users or divide … should use SYSASM to administer an Oracle ASM instance. The SYSDBA privilege cannot be used to … administer an Oracle ASM instance. If you use the SYSDBA privilege to run administrative commands on an … Oracle ASM

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Creating Users with the SYSASM PrivilegeThe SYSASM Privilege for Administering Oracle ASM SYSASM is a system privilege that enables the … separation of the SYSDBA database administration privilege from the Oracle ASM storage administration … password file authentication, as discussed in \"Password File Authentication for Oracle ASM\". To … SQL*Plus, use the following

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Password File Authentication for Oracle ASMPassword file authentication for Oracle ASM can work both locally and remotely. To enable password … file authentication, you must create a password file for Oracle ASM. A password file is also … required to enable Oracle Enterprise Manager to connect to Oracle ASM remotely. If you select the Oracle … ASM storage

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Administering Oracle ASM Instances

Best Practices White Papers on Migrating to Oracle ASMUsing Oracle Recovery Manager to Migrate Databases to Oracle ASM You can use Oracle Recovery … Manager (RMAN) to manually migrate to Oracle ASM. You can also use RMAN to migrate a single tablespace or … data file to Oracle ASM. For more information, see Chapter 8, \"Performing Oracle ASM Data Migration … with

Automatic Storage Management Administrator's Guide, 11g Release 2 (11.2)

Oracle ASM Configuration Assistant

Creating Oracle ASM Instances with Oracle ASM Configuration AssistantOracle ASM Configuration Assistant enables you to create an Oracle ASM instance if an Oracle ASM … instance is not found on the host, as shown in Figure 11-1. On the Create ASM page, you enter the SYS … password for the administrator of the Oracle ASM instance and the password for the ASMSNMP user that