Management method and device of storage resources

Abstract

The invention provides a management method of storage resources and a network storage system, wherein the network storage system comprises a storage controller and a plurality of magnetic discs, wherein at least one Raid array is established by using the magnetic discs; a port at the front end of the storage controller is connected to a client mainframe through a network; and the port at the back end of the magnetic disc is connected with the magnetic disc. A management mechanism comprises the following steps of: dividing an array space into blocks through presetting a resource block different in sizes, and establishing a corresponding block table used for recording whether the resource blocks are occupied or not; allocating the resource blocks and establishing a logical resource index table while establishing a logical resource so as to record a corresponding relation between the logical resources and the resource blocks; and carrying out management operation on the logical resources by taking the resource blocks as units, and updating the block table and the logical resource index table after the management operation is finished. The management method is simple, flexible, strong in expansibility and succinct in realization and has lower 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.

Images