Top Oracle ASM Interview Questions (2024)
What is Oracle ASM?
What advantages come with utilising Oracle ASM?
What components of Oracle ASM are there?
In Oracle ASM, what does a disk group mean?
What function does the Oracle ASM listener perform?
What does an Oracle ASM template mean?
What does Oracle ASM rebalancing mean?
How is the disk space managed by Oracle ASM?
What is the distinction between a normal file system and Oracle ASM?
How does Oracle ASM add a new disk to an already-existing disk group?
What distinguishes a normal disk from an Oracle ASM disk?
What is an Oracle ASM instance?
What is an Oracle ASM disk?
What steps must be taken in order to remove the disk from an Oracle ASM disk group?
In Oracle ASM, how can you create a disk group?
Q: What is Oracle ASM?
Ans:
Automatic Storage Management, commonly known as Oracle ASM, is a function offered by Oracle Database that makes it easier to manage database files, such as data files, control files, and log files.
Q: What advantages come with utilising Oracle ASM?
Ans:
Among the advantages of Oracle ASM are enhanced performance, streamlined storage management, increased scalability, and enhanced availability.
Q: What components of Oracle ASM are there?
Ans:
Disk groups, Oracle ASM instances, and Oracle ASM disks are the three primary components of Oracle ASM.
Q: In Oracle ASM, what does a disk group mean?
Ans:
A disk group is a set of physical disks which Oracle ASM manages as one logical unit. Disk groups, that offer redundancy and high availability, are used to store all database files.
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Q: What function does the Oracle ASM listener perform?
Ans:
The connections between database instances and the Oracle ASM instance are handled by the Oracle ASM listener. Database instances are able to access the storage that Oracle ASM is in charge of managing.
Q: What does an Oracle ASM template mean?
Ans:
A predefined set of attributes called a template can be utilized to create new disks or disk groups in Oracle ASM. By automating attribute configuration, templates make it easier to create new storage.
Q: What does Oracle ASM rebalancing mean?
Ans:
In Oracle ASM, rebalancing refers to the process of redistributing data among the disks in a disk group in order to enhance performance and add redundancy. Oracle ASM can start rebalancing automatically or manually.
Q: How is the disk space managed by Oracle ASM?
Ans:
An allocation unit, or fixed-size space block, is used by Oracle ASM to manage space on the disk. Data is distributed among the disks in a disk group using the allocation unit, which enhances performance and offers redundancy.
Q: What is the distinction between a normal file system and Oracle ASM?
Ans:
While Oracle ASM is a database-managed storage system, a normal file system needs a file system driver to manage storage. In comparison to a normal file system, Oracle ASM offers improved performance, reliability, and scalability.
Q: How does Oracle ASM add a new disk to an already-existing disk group?
Ans:
In Oracle ASM, user first need to create the physical disk before adding it to an existing disk
group using the ALTER DISKGROUP ADD DISK command.
Q: What distinguishes a normal disk from an Oracle ASM disk?
Ans:
A file system driver handles a normal disk, but the Oracle ASM instance handles an Oracle ASM disk. Disks used by Oracle ASM are formatted and managed differently from other types of disks.
Q: What is an Oracle ASM instance?
Ans:
A single Oracle ASM instance's storage is managed by a specific database instance called an Oracle ASM instance. It handles the metadata for disk groups and offers a storage access interface for other database instances.
Q: What is an Oracle ASM disk?
Ans:
Physical disks that are handled by Oracle ASM are referred to as Oracle ASM disks. Other file systems cannot access the disk since it is formatted and handled by Oracle ASM.
Q: What steps must be taken in order to remove the disk from an Oracle ASM disk group?
Ans:
User need to first make sure that this disk is not being used by any database instances or other
processes before we can remove it from an Oracle ASM disk group. The disk is then removed from
the disk group by using the ALTER DISKGROUP DROP DISK command. After then, the disk can be
physically taken out of the system.
Q: In Oracle ASM, how can you create a disk group?
Ans:
User need to first decide which disks to include in a disk group before creating one in Oracle ASM. Create configuration file and specify the disks and the attributes of the disk group, such as redundancy etc.