Oracle ASM权限简明指南（oracle asm权限）

Title: Oracle ASM Permissions: A Concise Guide

Oracle Automatic Storage Management (ASM) is a popular storage management solution utilized by many organizations to manage their database deployments. ASM provides the necessary functionality to manage the storage and retrieval of database content. However, it is crucial to ensure that only authorized personnel have access to the ASM instance. This is where Oracle ASM permissions come into play. In this article, we will provide a concise guide to Oracle ASM permissions and how to efficiently manage them.

Oracle ASM Permissions:

Oracle ASM permissions are a set of privileges granted to users and groups to manage ASM instance resources. These permissions determine the level of access granted to each user or group and define the specific actions that they can perform on ASM resources. There are three levels of permissions in Oracle ASM:

1. SYSASM:

SYSASM is the highest level of ASM permission. It is similar to SYSDBA in Oracle databases. Users with SYSASM permissions have complete control over the ASM instance and can perform all administrative tasks, including creating, modifying, and deleting ASM disks, files, and groups.

2. SYSDBA:

Users with SYSDBA privileges have considerable control over the ASM instance. They can create, modify, and delete ASM disks, files, and groups. However, they cannot perform certn operations that require SYSASM permissions, such as rebalancing ASM disks.

3. ASM Operator:

ASM Operator is the lowest level of ASM permission. Users with this permission can only perform basic operations, including monitoring and querying ASM instance resources. They cannot create or modify ASM disks, files, or groups.

Managing Oracle ASM Permissions:

Managing Oracle ASM permissions can be done using SQL commands or through the ASM Command-line Interface (ASMCLI). The following SQL command can be used to grant SYSASM permissions to a user:

ALTER USER username GRANT SYSASM;

Similarly, the following command can be used to grant SYSDBA permissions to a user:

ALTER USER username GRANT SYSDBA;

To revoke permissions, the following commands can be used:

REVOKE SYSASM FROM username;

REVOKE SYSDBA FROM username;

Permissions can also be managed using ASMCLI. The ASMCLI command-line interface is used to manage the ASM instance and supports commands for managing ASM permissions. The following example shows how to grant SYSASM permissions to a user using ASMCLI:

asmcmd setperm –asmsid ‘+ASM1’ –target ‘+DATA’ –privilege SYSASM –group asmadmin

Conclusion:

Oracle ASM permissions are essential to protect the ASM instance from unauthorized access. We hope this article provided you with a concise guide on how to manage ASM permissions efficiently. Remember to grant permissions only to authorized personnel and revoke permissions that are no longer required. By doing so, you can ensure that your ASM instance is secure and relevant data remns protected.