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Data transfer method, device and system

A data and dirty data technology, applied in the field of data migration, can solve the problem of large data transmission volume, and achieve the effect of reducing transmission and reducing data transmission volume

Active Publication Date: 2011-07-27
HUAWEI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Since each copy cycle copies the dirty memory pages generated in the previous cycle to the destination end, the data transfer volume is large; for applications with a lot of memory writing, the problem of large data transfer volume is particularly serious

Method used

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  • Data transfer method, device and system
  • Data transfer method, device and system

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] A method of data migration such as figure 1 As shown, during the operation of the source host and the target host, if data migration is required, the source host can perform the following steps:

[0031] 101: Calculate the rewrite rate of each storage stripe, the above storage stripe is obtained by segmenting the storage space that needs data migration;

[0032] The above-mentioned storage strips may be stored in the internal memory, or may be stored in oth...

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Abstract

The embodiment of the invention discloses a data transfer method, a data transfer device and a data transfer system. The method is implemented by the following steps of: calculating rewriting rates of each memory stripe, wherein the memory strips are obtained by segmenting a memory space required to perform data transfer; preferably transmitting dirty data in the memory stripes with low rewriting rates to a destination host; and finishing the data transfer after the transmission state of the dirty data reaches preset requirements. Due to the adoption of the technical means of segmenting the memory space required to perform the data transfer to obtain the memory stripes and preferably transmitting the dirty data in the memory stripes with the low rewriting rates to the destination host, the transmission of the dirty data, with relatively higher rewriting rates, of the memory space is delayed by utilizing a spatial locality principle and a temporal locality principle, and more memory writing operations are saved by writing combination to reduce the transmission of the dirty data and further reduce data traffic.

Description

technical field [0001] The present invention relates to the technical field of storage, in particular to a data migration method, device and system. Background technique [0002] Providing services through the network has become a popular business model, and in the process of providing services, it is very important to ensure the continuity of services. In order to ensure the continuity of the service, the dual-machine hot backup of the application layer can be used to avoid service interruption caused by the failure of the equipment providing the service. However, dual-machine hot standby faces many problems, such as: the Internet Protocol (IP) address between the hot standby machine and the production machine (the production machine refers to the host that provides services, and the hot standby machine is the backup host of the production machine) cannot be maintained. unanimous. Virtualization technology provides a new way of thinking to solve this problem. [0003] Vi...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/803
Inventor 杜雨阳余宏亮龚皓
Owner HUAWEI TECH CO LTD
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