Data access method and apparatus

A technology for data access and traffic volume, applied in the field of network storage, it can solve problems such as affecting the normal input and output of data and low data efficiency.

Active Publication Date: 2016-03-30
CHENGDU HUAWEI TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides a data access method and device to solve the problem of low efficiency of data input and output from a storage device, and when a storage controller fails, it will affect the data access of all logical units in the storage device Problems with normal input and output

Method used

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  • Data access method and apparatus

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Embodiment Construction

[0074] In the embodiment of the present invention, all data access requests (that is, I / O requests) for accessing a logical unit in the storage device are allocated to one storage controller, that is, one storage controller controls access to one or more logical units . In this way, not only can the cache hit rate of each storage controller be improved, thereby improving the access efficiency of the host to the storage device (that is, input and output I / O messages), but also can reduce the number of requests to the storage device when a storage controller fails. Influence of the normal input and output of all logic cells in . In addition, in a preferred embodiment of the present invention, it is also proposed that when the host monitors that the load of any storage controller exceeds the set threshold, it selects from each storage controller to share and process the data access of the logical unit. The cooperative storage controller processing method of the request improves ...

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Abstract

The invention relates to the field of network storage technology, and particularly relates to a data access method and apparatus. The data access method and apparatus are used for solving the problem that the data input and output efficiency of a storage device is low, and the problem that the normal input and output of the data of all logic units in the storage device will be influenced when a storage controller has failure. The embodiments of the invention provide a data access method, the method is applied to a storage system, the storage system comprises a host and the storage device, the storage device comprises a plurality of storage controllers, and the data access method comprises the steps that: the host generates a data access request, wherein the data access request comprises a logic unit number LUN of a logic unit marked by the LUN; the host determines the storage controller for controlling to access the logic unit marked by the LUN according to a mapping relation of the LUN and the storage controller; and the host sends the generated data access request to the determined storage controller.

Description

technical field [0001] The invention relates to the technical field of network storage, in particular to a data access method and device. Background technique [0002] Storage Area Network (SAN) is a centrally managed high-speed storage network consisting of multi-vendor storage systems, storage management software, application servers and network hardware, which can help users make full use of the storage information owned by the user. value. [0003] Such as figure 1 Shown is a schematic diagram of the storage structure of the SAN network. The application server to which the multipath software belongs sends a data access request to the storage device in the SAN through the host bus adapter (HBA) and the transmission device in the SAN network, that is, the input / output (I / O) request, and the storage After receiving the data access request, the controller (Controller) in the device performs an I / O operation on the storage data at the corresponding location according to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/20G06F11/30
Inventor 张力
Owner CHENGDU HUAWEI TECH
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