Data storage method and storage system

A data storage and data technology, applied in the storage field, can solve the problems of relatively large memory capacity requirements of the controller, reduced read and write speed, limited bandwidth, etc., to achieve the effect of ensuring data reliability, reducing pressure, and reducing requirements

Active Publication Date: 2019-03-01
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, in this way, the memory of the controller must reserve mirrored data storage space to accommodate the mirrored data sent by other controllers, so the memory capacity of the controller is required to be relatively large
Moreover, since the bandwidth of the PCIe / IB(nfiniband) channel is limited, when there is a lot of mirror data, it will put pressure on the normal data transmission of the PCIe / IB(nfiniband) channel
Finally, when there is a problem with one of the controllers, all data can only be stored through the remaining controllers. In order to ensure the reliability of the data, the remaining controllers will not cache the data in this controller, but Write directly to the storage device, greatly reducing the speed of reading and writing

Method used

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Embodiment Construction

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] It should be noted that the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be und...

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Abstract

The invention discloses a data storage method and storage system. The method includes: the host computer selectively sends the target data to the first controller or the second controller; if the controller that receives the target data is the first controller, the first controller determines according to the ownership information in the target data. Whether the target data belongs to the first controller for processing; if not, the first controller forwards the target data to the second controller; if so, the first controller sends the target data to the first cache device or the second cache device Store in the first cache device to obtain the first mirror data; when the data in the cache device needs to be stored in the storage device, the first controller controls the first cache device and the second cache device including the target data. The data processed by the processor is stored in the storage device. The above method reduces the demand for controller memory and reduces the pressure on the mirror path between controllers.

Description

technical field [0001] The invention relates to the field of storage, in particular to a data storage method and a storage system. Background technique [0002] Most of the data calculated in the host computer will eventually be sent to the storage device for storage. In order to ensure the reliability of the process of storing data to the storage device by the host computer, the storage system usually adopts a multi-controller structure. For example, as figure 1 As shown, the storage system 120 includes a first controller 121 , a second controller 122 and a storage device 123 . The first controller 121 is used for data communication with the upper computer 110, and the second controller 122 is also used for data communication with the upper computer 110. ) connection, the first controller 121 is connected to the storage device 123 , and the second controller is also connected to the storage device 123 . [0003] Since the speed of reading and writing data between the ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/0866G06F12/0893
CPCG06F12/08
Inventor 贾晓林许慧锋陈昊
Owner HUAWEI TECH CO LTD
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