How to allocate storage space

Abstract

The invention provides a distribution method of a memory space. The distribution method comprises the steps of: during the write operation of a user, when the limited physical memory space is insufficient, searching a free physical extent from a shared physical memory space, writing data in the free physical extent, distributing and expanding the physical memory space for the user and transferring the data to the physical memory space. Therefore, the use ratio of the memory space is increased, the requirement of the memory space is reduced and the cost is reduced.

Description

technical field [0001] The present invention generally relates to the field of computer technology, and more specifically, relates to a method for allocating storage space. Background technique [0002] The main function of the memory is to store programs and various data, and to complete the program or data access at high speed and automatically during the operation of the computer. A memory is a device that "memorizes". In the past, the computer system only included very limited common storage devices, and these storage devices were accessed by installing them in different places. The storage spaces of these different installation points could not communicate with each other. Before using the limited storage devices, you must have a Clear planning, otherwise unforeseen problems may occur during use, such as insufficient space. [0003] As more and more storage devices are added to the system, this one-to-one structure obviously cannot meet the needs of users, and even ca...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, when an application needs a part of the storage space, it is often pre-allocated a part of the back-end storage system that is large enough for the application, even if the application does not need to use such a large space for the time being. storage space, but because this part of the storage space has been reserved, other applications cannot take advantage of the deployed but idle storage capacity

On the one hand, this allocation mode increases the amount of idle storage, and the utilization rate of storage space is low, which increases the system cost accordingly; on the other hand, users have to purchase larger storage capacity, which further increases the cost

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