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    Introducing Oracle Automatic Storage Management

    This blog post explains everything about Oracle automatic storage management feature. What is ASM and what is ASM disk are also covered.

    Automatic Storage Management (ASM) was introduced in Oracle Database 10g Release 2 and higher. It enables you to create a storage pool that is automatically managed by Oracle Database for you.

    Automatic Storage Management (ASM) will only save you so much space. If you don’t have a good database design, then ASM will not be able to help you. You still need to have good programming practices, so that you won’t blithely write programs that cause your database to get too large for the Automatic Storage Management scheme to handle.

    Overview of Oracle Automatic Storage Management

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    Automatic storage management is an add-on feature to the database. It allows you to define a storage area in your database that is used to automatically manage all your data. It means you don’t have to worry about how much storage your database uses. When the space is required by an operating system or another database object, the space will be de-allocated from your ASM storage area. It’s possible to decide when you should get rid of unused space in your storage area. When you create or modify objects in your database, you can either define space allocation policies in your ASM definition file or use the ASM keyword. If you use space allocation policies, you need to be aware of what you’re doing.

    Oracle Database’s Automatic Storage Management (ASM) is designed to provide automatic de-allocation of memory by reclaiming physical space used by the database and the Java Virtual Machine (JVM). You can use ASM for many things, such as managing the physical disk space that is allocated to Oracle Database, allocating additional virtual memory, and de-allocating storage from the physical or virtual pools for which you have created storage policies. today, we will discuss how to configure and use ASM in Oracle Database. We will also talk about monitoring ASM usage. Storage pools are the smallest unit of storage that you can allocate or de-allocate from your ASM-defined storage area. They are the equivalent of disk drives in a computer.

    About Oracle Automatic Storage Management Cluster File System

    Automatic storage management is an add-on feature to the database. It allows you to define a storage area in your database that is used to automatically manage all your data. It means you don’t have to worry about how much storage your database uses. When the space is required by an operating system or another database object, the space will be de-allocated from your ASM storage area. It’s possible to decide when you should get rid of unused space in your storage area. When you create or modify objects in your database, you can either define space allocation policies in your ASM definition file or use the ASM keyword. If you use space allocation policies, you need to be aware of what you’re doing.

    Understanding Oracle ASM Concepts

    Oracle Database’s Automatic Storage Management (ASM) is designed to provide automatic de-allocation of memory by reclaiming physical space used by the database and the Java Virtual Machine (JVM). You can use ASM for many things, such as managing the physical disk space that is allocated to Oracle Database, allocating additional virtual memory, and de-allocating storage from the physical or virtual pools for which you have created storage policies. today we will discuss how to configure and use ASM in Oracle Database. We will also talk about monitoring ASM usage. Storage pools are the smallest unit of storage that you can allocate or de-allocate from your ASM-defined storage area. They are the equivalent of disk drives in a computer.

    What is the Oracle ASM Instance?

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    Oracle ASM instance is different than the Oracle instance. Oracle ASM instance is for managing disks and disk groups. It can mount and unmount disks as we do in storage management.

    Oracle ASM instance is in an Oracle database. All the data in an Oracle ASM instance is stored on disk drives. The Oracle ASM instance manages these disk drives. What are the benefits of using Oracle Automatic Storage Management? Using Oracle ASM provides several important benefits: Reduces database storage requirements by up to 90% (this is very significant) Enables you to add more space to your Oracle Database at any time without incurring any additional cost. This means you always have enough space to handle your workload, and you never have to worry about running out of space. Increases performance because data access will be faster due to the fact that data will be closer to the CPU. How do we use Oracle Automatic Storage Management? The first step is we define our storage area. To do this, we create a disk group. A disk group is nothing but a collection of physical disk drives. Next, we define the storage area. We do this by defining the size of the storage pool. After that, we define the location of that storage pool. And finally, we mount the disk group. Disk mirroring and disk striping are the major features of the Oracle ASM instance.

    What is ASM DISK?

    The instance is in a database The data is stored on disks. The disk drives are managed by the instance. The benefits of using Automatic Storage Management. Reduces database storage requirements by up to 90% and allows you to add more space to your database at no extra cost. You never have to worry about running out of space if you have enough space. Data access will be quicker due to the fact that data is closer to the processor. How can we use automatic storage? We define our storage area first. We created a disk group. A disk group is a collection of drives. We define the storage area. The storage pool size is defined. We define the location of the storage pool. There is a disk group. Disk striping and disk mirroring are some of the major features.

    Oracle ASM Disk Groups?

    In order to effectively manage your Oracle Automatic Storage Management, it’s important to understand the basics of the two basic concepts, namely the storage pool and the allocation unit. In addition to these concepts, you should also be aware of the other basic components, such as the Oracle ASM library, the Oracle ASM command language, and the Oracle ASM Utility. For example, if you have a table named employees and you define an ASM storage pool with 100 MB as its size, then all the records in that table will be treated as one allocation unit. How does Automatic Storage Management work? Let us suppose you have a table named employees in an Oracle Database and you have defined an ASM storage pool with 100 MB as its size. Now, let us say you have 1000 rows of data in that table. So, each row in that table will be an allocation unit. And this will happen transparently. When you insert a new row into the table, the entire contents of the table will be copied to a new location in the ASM storage area. And this will happen transparently.

    What are the disk Mirroring and disk Failure Groups?

    In Oracle ASM we can create disk mirroring and disk failure groups to manage storage. It is useful to protect disk failure and improve performance

    Protection against disk failures can be provided by balancing the I/O load between disks. A failure group is a collection of two or more disks in a single unit. A failure group can be created using either of the two methods. You can specify the percentage of I/O requests that should be performed on the disks in the failure group. If we have three physical disks in our environment and create a failure group with two mirrored disks and one single disk, we will have six disks in the failure group. We will have an even distribution of the workload if we assign 50% of the I/O load to the mirrored disks and 50% to the single disk. This means the database won’t have to wait for a disk to be unavailable. The workload will be evenly distributed between the two remaining disks if one of them fails. This will make sure we don’t have a point of failure.

    What are the Oracle ASM Disks?

    Oracle ASM Disk Groups are nothing but a collection of physical disk drives. We can have many Oracle ASM disk groups in our database. We can also have many Oracle ASM disk groups in our environment. Let’s say we have an Oracle Database with four disks and we want to create an Oracle ASM instance with two disks. In this case, we will have a total of six disks. Now, let’s say we have another Oracle Database with five disks and we want to create an Oracle ASM instance with three disks. In this case, we will have a total of eight disks. What if we have ten Oracle Databases? Yes, it does. If we have more Oracle Databases we will be able to use more Oracle ASM disk groups. Having more Oracle ASM disk groups means that we will have more storage area for data. More storage area means better performance. We need to know how much space we will need in our Oracle ASM instance before we start designing the environment. Oracle ASM tells us this information. Oracle ASM knows how much space is needed to manage all the physical disks in our environment.

    What are the Oracle ASM Allocation Units?

    An Oracle ASM disk is divided into allocation units. Each allocation unit can be divided further into stripes. A stripe contains a number of sectors. The number of sectors per stripe depends on the size of the allocation unit and the size of the stripe. If an allocation unit is 1 MB in size, then the number of sectors per allocation unit can be 32,000, 128,000, or even 1,600,000. If a stripe is 1 MB in size, then there will be 32 * 1,000,000 = 32,000 sectors per stripe. If the stripe size is 1 KB, then an allocation unit will contain 128 * 1,000,000 = 128,000 sectors. Oracle ASM Mirroring Scenarios In this section, we will discuss two scenarios for Oracle ASM mirroring. The first scenario is when you want to create a database on one server and use this database as the primary target for your applications.

    What are the Oracle ASM Files?

    The Metadata about the VDISKS, allocation units, and stripes can be found in the Oracle ASM files. The names of the VDISKS that make up the disks of the mirror are used as the basis for the filename of an Oracle ASM file. The structure of the data in the Oracle ASM file is similar to the structure of the data in the Oracle ASM file.

    What are the Oracle ASM Extents?

    The number of allocation units in a stripe is the definition of an Oracle ASM extent. If a stripe is less than 1 MB, the extent will be less than 1 million allocation units. A virtual disk partition can be thought of as the extent of an oracle. Let’s say we have a server named server1, which has two physical disks, and we have a scenario like this. The first disk has a capacity of 500 gigabytes, and it is configured as an oracle mirror. The second disk has a capacity of 700 gigabytes, but it is not configured as an oracle mirror. We have another server named server2 and it has two physical disks as well. The first disk has a capacity of 500 gigabytes, and it is configured as an oracle mirror. The second disk has a capacity of 700 gigabytes and it is configured to be an oracle mirror

    What is the Oracle ASM Striping?

    ASM Striping is the process of allocating blocks of data to different VDISKS in order to increase the performance of your database. Striping is enabled by default and it is based on the needs of the Oracle Database. If you are using Oracle ASM, the striping size is 1 MB default.

    Oracle Automatic Storage Management (ASM) is an intelligent data management solution that enables you to automatically move active data to the most cost-effective storage location. Oracle ASM is part of the “Automatic Storage Management” feature set in Oracle Database 10g onwards versions.

    1. ASM is an amazing technology that makes it possible to add and remove storage without rebooting your computer.

    2. This amazing technology also makes it possible to add or remove disk space at the speed of light!

    3. You can use this technology to automatically expand or contract your hard drive as needed, so your files always have room to grow.

    4. ASM is a great way to protect your data and ensure your information is always accessible.

    Conclusion:

    ASM (Automatic Storage Management) is a powerful and essential tool for storage administrators. With ASM, you can automatically archive old data to free up space for new data. You can also automatically delete old data to make room for new stuff. In this way, ASM helps you achieve optimal performance and availability. ASM is an essential element in any data center or corporate network. It allows you to automatically store and retrieve data on behalf of your users. This powerful feature can significantly improve the performance of your applications.

    It is possible to use an automatic storage management solution for databases. It allows you to specify storage requirements for your objects, and then de-allocate unused space when you need it. You don’t have to worry about running out of space and having to buy more because of this. It is useful for large database applications such as customer information systems and corporate data warehouses.

    When you want to make a strong Oracle DBA career then you should be aware of database services and other database technology. Without having knowledge of Oracle internals, Oracle performance tuning, and skill of Oracle database troubleshooting you can’t be an Oracle DBA expert. This expert DBA Team club blog always provides you latest technology news and database news to keep yourself up to date. You should need to be aware of Cloud database technology like DBaaS. These all Oracle DBA tips are available in a single unique resource at our orageek. Meanwhile, we are also providing some sql tutorials for Oracle DBA. This is the part of Dbametrix Group and you would enjoy more advanced topics from our partner resource.

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