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System for establishing logical volume and method thereof

A logical volume and algorithm technology, applied in the storage field, can solve problems such as limited number of snapshot creation, waste of disk space, cumbersome creation steps, etc., and achieve the effect of facilitating maintenance, reducing waste, and simplifying creation steps

Inactive Publication Date: 2009-02-11
INVENTEC CORP
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Problems solved by technology

[0007] The object of the present invention is to provide a logical volume creation system and its method in order to solve the above-mentioned problems and defects in the prior art, so as to solve the problems of cumbersome creation steps, waste of disk space, and limited number of snapshots created in the prior art.

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  • System for establishing logical volume and method thereof
  • System for establishing logical volume and method thereof
  • System for establishing logical volume and method thereof

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Embodiment Construction

[0041] 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.

[0042] Please refer to figure 2, which is a system block diagram of the logical volume creation system of the present invention, the system includes an allocation module 12 , a timestamp creation module 14 , a timestamp storage module 18 and a pointer module 16 . The allocation module 12 allocates a logical volume available space and a time stamp storage area in the logical volume according to a space allocation algorithm, where the time stamp storage area can be a snapshot pool, similar to the concept of a storage pool, wherein the time stamp storage area can be It is a small space, and its spac...

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Abstract

The invention relates to a logical volume creation system and a method thereof for solving the problems that the creation steps is complex, the storage medium space is wasted and the snapshot creation number is limited in the prior art. Firstly, a logical volume available space and a time stamp storage zone are allocated in a logical volume according to a space allocation algorithm; then, the data of a time point are modified according to the initial data and the subsequent data of the logical volume, the data modified in the data of the logical volume corresponding to the time point is copied during the writing in sequence, to create a time stamp corresponding to the time point; then, the time stamp corresponding to the time point is stored into the storage zone of the time stamp; then, a storage medium offset address pointer is created for recording the writing position of the copy-on-write operation of the corresponding time point; lastly, the pointer is stored into the storage medium for used as the index information of the time stamp address.

Description

technical field [0001] The invention relates to the technical field of storage, in particular to a logical volume creation system and method thereof. Background technique [0002] In order to ensure the security of user data in an efficient and orderly manner, various storage technologies have emerged, such as Redundant Array of Independent Disks (RAID), Logical Volume Manager (LVM), and so on. Among them, the logical volume manager has a device snapshot (snapshot) feature, and the snapshot can perform real-time backup of data at a specific point in time in the logical volume of the LVM, and hardly affects the efficiency of data services. At present, the logical volume manager in the prior art proposes a dependent snapshot technology, that is, the old snapshot depends on the existence of the newly created snapshot, and the data rewritten by the user on the volume group is only backed up in the last created snapshot. In this way, the waste of the storage medium space can be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G06F11/14
Inventor 李磊贺雷陈玄同刘文涵
Owner INVENTEC CORP
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