Space distribution and management method and device for network storage system

Abstract

The invention provides a space distribution and management method and device for a network storage system, which are used for performing resource management operation in the network storage system. The device comprises a resource management unit, a forward space management unit and a backward space management unit, wherein the resource management unit is used for establishing a RAID (Redundant Array of Inexpensive Disk), dividing available space of the RAID into a plurality of resource blocks according to specified length and establishing a block list; an index area is established for logic resources when the logic resources are established; all index initial values pointing at physical resource blocks in the index area are null; the forward space management unit is used for enabling distribution of the actual physical resource blocks when processing an IO (Input Output) request on the logical resources; and the backward space management unit is used for recovering and utilizing idle resource blocks. In the method and the device, the utilization efficiency of storage space is effectively improved through distribution and recovery of the resource blocks.

Description

technical field [0001] The invention relates to network storage technology, in particular to a RAID array resource block management technology. 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 front end of a general network storage system can be connected to the host through an IP network or FC network to provide data storage services for the host. In terms of data transmission, taking an IP-based network storage system as an example, the host can perform data read and write operations based on the standard iSCSI (Internet Small Computer System ...

AI Technical Summary

Problems solved by technology

[0013] The above solution reduces the waste of resources to a certain extent, but there are still the following problems: First, the most appropriate setting for the pre-allocated physical space of the LUN depends on the experience of the administrator

Secondly, the LUN pre-allocated physical space is private to each LUN, and this space cannot be shared among multiple thin-provisioned LUNs.

Finally, LUNs with thin provisioning enabled and LUNs without thin provisioning coexist in the system. Different management methods are adopted. As application requirements change, it is very complicated to enable and disable thin provisioning for an existing LUN.

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