Storage virtualization is the combination of physical storage from various storage devices into what seems to be a single storage device. In other words, we can say that pool of available storage capacity is accomplished from a central console.
This technology trusts software to categorize open storage capacity from physical devices. Then combined that capacity as a group of storage that may be used by outdated architecture servers or in a virtual environment by virtual machines.
This technology has been used excessively over the years to resolve a lot of the challenges with development and handling big quantities of storage. Virtualized storage has developed even more significantly nowadays as the amount of data stored carries on to rise exponentially every year.
Storage virtualization supports the management of storage by enabling easy backup, and recovery jobs in the shortest time. Storage virtualization combinations the functions and hides the real difficulty of the storage area network (SAN).
Storage Virtualization may handle easily the challenges of Vendor lock-in, data migration across arrays, scalability, redundancy, performance, high costs, and management.
Benefits and uses
A single management console to monitor and maintain multiple virtualized storage arrays cuts down on the time and effort essential to manage the physical systems. This is mainly helpful when storage systems from many vendors are in the virtualization group.
Well storage operation
Pooling storage capacity through various systems makes it stress-free to assign therefore the capacity is more proficiently assigned and used. With separate, unequal systems, some systems will probably wind up operating at or near size, but others are hardly used.
Lengthen the lifespan of older storage systems
Virtualization deals with an extreme method to extend the use of older storage gear. That happened with them in the group as a step to control archival or less dangerous data.
Enhance innovative features entirely
Nearly added innovative storage features such as tiering, hiding, and replication can be implemented at the virtualization level. This supports standardizing these rehearse through all member systems and can provide these innovative functions to systems that can be lacking them.
Storage virtualization model
Storage virtualization can be useful to any level of a storage area network SAN. The virtualization methods may also be implemented for different storage functions for example;
- Physical storage
- RAID groups
- Logical unit numbers (LUNs),
- LUN subdivisions
- Storage zones and logical volumes, etc.
The storage virtualization model may be distributed into the following key layers:
- Storage devices
- Block aggregation layer
- File or record layer
- Application layer
How does storage virtualization work?
- To make an available entrance to the data stored on the physical storage devices, the virtualization software requires either making a map using metadata or, in some cases, using an algorithm to dynamically find the data on the take wing.
- The virtualization software then stops read and write requests from applications and using the map it has shaped it may find or save the data to a suitable physical device.
- This process is like the method used by PC operating systems when recovering or saving application data.
- Storage virtualization covers the real difficulty of a storage system, for example, a SAN that supports a storage administrator does the jobs of backup, archiving, and recovery more effortlessly and in less time.
Types of Storage Virtualization
The below are types of storage virtualization in Cloud Computing;
- Hardware-Assisted Virtualization
This type of virtualization needs hardware care. The original Operating System can run as hardware care for virtualization. We may similarly use it to handle hardware contact requests and protect operations.
- Kernel Level Virtualization
In this type of virtualization, we run a distinct version of the Linux Kernel. That level permits running several servers in a single host. It practices a device driver to the link between the leading Linux Kernel and the virtual machine. This virtualization is a distinctive form of Server Virtualization.
- Hypervisor Virtualization
This type of virtualization is a layer between the Operating system and hardware. Several operating systems can work with the help of a hypervisor. Furthermore, it makes available features and essential services that help Operating System to work correctly.
Para-Virtualization is created on a hypervisor that controls the emulation and trapping of software. The guest operating system is improved here before installing it on any more machines. The modified system connects directly with the hypervisor and increases the performance.
- Full Virtualization
This type of virtualization is like to Para-Virtualization. The hypervisor set-ups the machine operations here. That is used by the operating system to do the operations. It follows in particular software and the status codes returned after trapping the operations.