Snapshot-storing copy-on-write processing system and method
A copy-on-write and processing system technology, applied in the storage field, can solve the problem of increasing the delay time of the source volume write operation, and achieve the effect of reducing the delay time
Active Publication Date: 2017-04-26
ZHENGZHOU YUNHAI INFORMATION TECH CO LTD
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Problems solved by technology
In this case, a write operation of the source volume needs to trigger a read operation and two write operations of the disk, which greatly increases the delay time of the write operation of the source volume
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[0032] The core of the present invention is to provide a storage snapshot copy-on-write processing system and method, which can solve the delay problem existing in the traditional snapshot technology. .
[0033] In order to make the above objects, features and advantages of the present invention more comprehensible, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0034] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.
[0035] Please refer to figure 1 , figure 1 A schematic structural diagr...
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The invention discloses a snapshot-storing copy-on-write processing system and method. The system comprises a snapshot module and a fast writing cache module, wherein the snapshot module is respectively connected with a source volume module and a target volume module; the fast writing cache module is located between the snapshot module and a host computer; the fast writing cache module is used for directly receiving a write operation signal when the write operation signal is sent by the host computer, sending a corresponding feedback signal to the host computer and sending the self-stored write operation signal to the snapshot module according to a degradation strategy of the fast writing cache module; and the snapshot module is used for performing copy-on-write according to the write operation signal sent by the fast writing cache module. When the write operation signal is sent by the host computer, the fast writing cache module directly sends the feedback signal to the host computer when the write operation signal is received by the fast writing cache module; seen from the host computer side, the write operation is completed at the moment, and the delay time is effectively reduced; and the write operation signal cached by the fast writing cache module is sent by the fast writing cache module to the snapshot module for copy-on-write, and the copy-on-write process of the snapshot module is not influenced.
Description
technical field [0001] The invention relates to the field of storage technology, in particular to a storage snapshot copy-on-write processing system and method. Background technique [0002] With the rapid development of computer technology, digital information has gradually replaced paper media data in many areas, showing an average daily exponential growth. Massive data has given birth to the development of cloud computing, big data and mass storage systems, and the demand for storage devices and storage applications is also increasing. [0003] Government industries, banking systems, and power companies have high requirements for data security and business continuity, and online data protection must be provided. Snapshot is a method for online storage devices to prevent data loss. In more and more high-end storage systems, the snapshot module has become a basic and indispensable element. In the copy-on-write (Copyon write) technology, when writing a certain block of the...
Claims
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IPC IPC(8): G06F11/14G06F17/30G06F3/06
CPCG06F3/0611G06F3/064G06F3/065G06F3/0676G06F11/1448G06F16/128
Inventor 孟宪伟慕国庆顾长顺侯志远
Owner ZHENGZHOU YUNHAI INFORMATION TECH CO LTD