Storage resource management method and device

Abstract

The invention provides a storage resource management method and a network storage system. The network storage system comprises a storage controller and a plurality of disks, wherein a plurality of Raid arrays are established by the disks; a front port of the storage controller is connected with a host through a network; and a rear disk port is connected with the disks. The management method comprises the following steps of: partitioning an array space through resource blocks of preset sizes; establishing a corresponding block list for recording whether the resource blocks are occupied; in theprocess of establishing logical resources, allocating the resource blocks and establishing a logical resource index list so as to record the corresponding relationship of the logical resources and the resource blocks and record the sizes of the resource blocks; and taking the resource blocks as units for management operation of the logical resources, and updating the block list and the logical resource index list after the management operation. The management method is simple and flexible, high in expansibility, easy to implement and lower in cost.

Description

technical field [0001] The invention relates to network storage technology, in particular to a hierarchical management technology of storage resources. Background technique [0002] In the network environment involving data storage of many hosts, in order to improve the reliability and security of data storage, and at the same time for the expansion and flexibility of storage capacity, network storage technology emerges as the times require. Generally speaking, the role of the network storage system is to provide available storage space for client PCs or servers (generally collectively referred to as hosts or Hosts). [0003] The core of the network storage system is the storage controller (Controller), which performs data processing and writes the data to the back-end physical disk. In order to improve the performance of writing physical disks and provide data redundancy, the storage controller usually supports Redundant Array of Independent Disks (Raid) technology, which ...

AI Technical Summary

Problems solved by technology

For the integrated management of logical resources and Raid arrays, the logical resource is a Raid array, and a Raid array can only be created based on one disk group. However, although this management technique is relatively simple, it has several obvious technical problems: First , for logical resource expansion, whether it is expanding on the same disk group (that is, the disk space of the same Raid is not continuously distributed), or using different disk groups to expand capacity, it is necessary to add an additional virtualization layer on the logical resource. The implementation is complex; second, for the requirement of automatic tiering, because the minimum granularity of logical resource management is the Raid array, so only the entire Raid array can be migrated together, and the migration granularity is too large

On this basis, an improvement scheme is to divide subvolumes based on logical resources and implement subvolume-based migration. This scheme refines the granularity of migration, but needs to add subvolume management layers to existing logical resources; In addition, subvolumes are only divided on the existing logical resources, and the free space is not managed uniformly.

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