Method and device for performing I/O request buffer memory based on magnetic disc and SAN memory apparatus

A technology for storage devices and disks, applied in the direction of input/output to record carriers, etc., can solve the performance bottleneck of storage devices and the decline of I/O processing capacity, etc., to improve I/O processing capacity, improve performance, and ensure sequentiality. Effect
CN101299181AInactive Publication Date: 2008-11-05NEW H3C TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NEW H3C TECH CO LTD
Publication Date
2008-11-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method and device for executing I / O request cache based on disk, suaitable for an SAN storage device with a plurality of disks. The methods includes: establishing an I / O request cache queue for each disk of the storage device, and recordign the address mapping relations between the logical volume and the disks; when the client I / O request is received, executing the following steps: extracting the logical volume carried by the I / O request and the address of the logical volume, finding to obtain the corresponding disk and disk address according to the recorded address mapping relations, and inserting the I / O request into the I / O request cache queue of the disk according to the preset disk address ordering method. The present invention also discloses an SAN storage device. The invention, to a certain extent, ensures the order of the I / O request disk processing; improves the I / O processing capability of the disk interface; improved performance of the storage devices.
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Description

technical field

[0001] The present invention relates to the technical field of storage area networks, in particular to a method and device for caching I / O requests based on disks, and also relates to a SAN storage device. Background technique

[0002] SAN (Storage Area Network, Storage Area Network) is a dedicated storage system that connects one or more network storage devices and clients through a dedicated Fiber Channel network or IP network, and is used to provide communication between clients and storage systems. data transmission. The working principle of SAN is: the storage device allocates block storage resources for the client, and the client and the storage device are based on the storage protocol, such as FC (Fibre Channel, Fiber Channel), iSCSI (internet Small Computer System Interface, Internet small computer system interface). Communication to realize data read and write operations of storage resources.

[0003] Wherein, the basic storage unit of the storage ...

Claims

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