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Processing method and equipment for snapshot resource

A resource, snapshot technology, applied in the field of communication

Inactive Publication Date: 2012-09-26
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the inventor believes that the operation of taking the snapshot resource offline to ensure the normal use of the main resource has many disadvantages in the prior art when the read failure of the main resource fails

Method used

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  • Processing method and equipment for snapshot resource
  • Processing method and equipment for snapshot resource
  • Processing method and equipment for snapshot resource

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0041] The core idea of ​​the present invention is: when the data reading in the main resource fails, use the reserved space in the main resource to write new data, without destroying the data area that cannot be read, and when the snapshot resource is not offline To ensure the normal reading and writing of main resources.

[0042] The present invention provides a method for processing snapshot resources, which is applied to a system in which the main resource of a storage area network (SAN) is configured with snapshot resources, such as Figure 4 As shown, the method includes:

[0043] Step 401, when writing new data into the data block of the main resource, if a read failure occurs, write the new data into the reserved data block of the main resource, and at the same time retain the data in the original data block of the failed read;

[0044] Step 402, storing the data in the reserved data block in the snapshot resource;

[0045] Step 403, storing the corresponding relati...

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PUM

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Abstract

The invention discloses a processing method and equipment for a snapshot resource. The method of the invention comprises the following steps: when writing new data in a data block of a main resource, if reading failure occurs, writing the new data in a retention data block of the main resource, simultaneously retaining the data of reading failure in the original data block, storing the data in the retention data block in the snapshot resource, storing the position corresponding relation of the retention data block and the original data block and a current snapshot time stamp by mapping items,and further ensuring normal reading and writing of the main resource according to the mapping table under the condition that the snapshot resource is not off-line.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for processing snapshot resources. Background technique [0002] The core of snapshot (Snapshot) technology is CFW (Copy On First Write, copy on first write), the specific meaning is: create a snapshot for a SAN (Storage Area Network, storage area network) (also known as the main resource) After resources, such as figure 1 As shown, when a data block on the primary resource changes for the first time (for example, data blocks B, G, and L are to be changed to data blocks B1, G1, and L1), the system first copies data blocks B, G, and L to In the snapshot resource, and then write new data to the location where the data blocks B, G and L of the main resource are located. When the data blocks B1, G1, and L1 change again, the system directly writes new data to the location where the data blocks B1, G1, and L1 are located, instead of copying the data blocks B1, G1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/14G06F3/06
Inventor 余剑声孙策
Owner NEW H3C TECH CO LTD
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