Snapshot method and system based on tiered storage

A layered storage and snapshot technology, applied in the storage field, can solve the problem of inconvenient snapshot storage technology

Active Publication Date: 2013-04-17
RAMAXEL TECH SHENZHEN
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Problems solved by technology

[0004] In summary, the existing snapshot storage technology obviously has

Method used

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  • Snapshot method and system based on tiered storage
  • Snapshot method and system based on tiered storage
  • Snapshot method and system based on tiered storage

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[0057] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0058] figure 1 It is a schematic structural diagram of a snapshot system based on hierarchical storage in the present invention. The snapshot system 100 includes at least one solid-state hard disk 10 and at least one mechanical hard disk 20. The solid-state hard disk 10 includes at least a table creation module 11 and an address writing module 12. , table preservation module 13 and backup module 14, wherein:

[0059]The table creation module 11 is used to create a snapshot address mapping table, which is used to store the mapping relationship between the logical address and the physical address o...

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Abstract

The invention provides a snapshot method and a system based on tiered storage. The snapshot method is applied to a snapshot system which comprises at least one solid-state disk and at least one hard disk drive. The snapshot method includes the following steps: (a) creating a snapshot address mapping table, (b) writing mapping relations between the logic address and physical address of updated data in the created snapshot address mapping table when data are updated in the solid-state disk, (c) storing the written snapshot address mapping table when the scheduled time point comes and creating a new snapshot address mapping table; (d) backing up the corresponding snapshot data of the stored snapshot address mapping table in the hard disk drive according to the scheduled backup strategy when an scheduled backup opportunity comes. According to the snapshot method and system based on tiered storage, at latest current data are stored in a high-speed solid-state disk so that the read-write speed of data is improved, meanwhile, snapshot data are stored in a low-speed hard disk drive so that the use efficiency of the solid-state disk is improved.

Description

technical field [0001] The invention relates to snapshot technology in the storage field, in particular to a snapshot method and system based on layered storage. Background technique [0002] The reading and writing characteristics of solid-state hard drives, the reading and writing unit is page, and the erasing unit is block. Every time data is written into a new blank page, the original page will be recorded and wait for recycling. Therefore, the controller implements the FTL (Flash Translation Layer) function and maintains the mapping from the logical address to the actual physical address. When the data is updated, it only needs to correspond the logical address of the data to the new physical address. The original physical address of data waiting to be recycled. [0003] Snapshot (Snapshot) technology is a fully available copy of a specified data set, which includes an image of the corresponding data at a certain point in time (the point in time when the copy starts)....

Claims

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Application Information

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IPC IPC(8): G06F11/14G06F3/06
Inventor 李明星
Owner RAMAXEL TECH SHENZHEN
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