Method and device for writing data to production volume

Abstract

Embodiments of the present invention provide a method and a device for writing data into a production volume. The method for writing data into a production volume comprises: receiving a data operation request, the data operation request carrying data to be written, and an initial address and length of the data to be written; when copy-on-write is not performed in a target area of the data to be written in the production volume, determining, according to the initial address, the length and a preset storage granularity of the data to be written, a data block on which copy-on-write needs to be performed; performing copy-on-write on the data block in need, to generate a mapping tag corresponding to the data block; and writing the data to be written into the data block after copy-on-write. The embodiment of the present invention dynamically adjusts the actual size of the data block on the production volume corresponding to the mapping tag, thereby improving the system performance and saving the resources in the resource pool.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a method and device for writing data to a production volume. Background technique [0002] With the continuous development of information science and technology and the wide application of the Internet, the amount of data generated is growing at an incredible speed. The design of the storage system has gradually become a problem that needs to be considered in the design of the application system. Higher requirements are put forward in terms of availability, reliability, and scalability. At the same time, green storage is also vigorously advocated, so higher requirements are put forward for the reasonable allocation and utilization of storage system resources. On the one hand, the demand for data protection, data backup, and data parallel utilization (such as testing, report generation, and / or data analysis, etc.) is becoming more and more impor...

AI Technical Summary

Problems solved by technology

However, since the size of the actual data block on the production volume corresponding to the mapping mark in the mapping table is fixed, there are problems of reducing system performance and wasting resource pool resources, and after a long time of reading and writing, the mapping mark in the mapping table is random Therefore, multiple redirections are required when reading and writing snapshots or production volumes, and the location corresponding to each redirection is random, and the read and write performance will be greatly reduced

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