Method for enhancing logical volume management LVM function

A logical volume and volume management technology, applied in the direction of input/output to record carrier, etc., can solve the problems of different performance and performance difference of storage devices, etc.

Inactive Publication Date: 2010-01-06
宋振华
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the performance of storage devices in the system may vary greatly: for example, in the current system, some storage devices of some computers are often shared with other computers in the same network. It is directly connected to itself, and there

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  • Method for enhancing logical volume management LVM function
  • Method for enhancing logical volume management LVM function
  • Method for enhancing logical volume management LVM function

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Embodiment Construction

[0073] In order to solve the problems in the prior art, the present invention proposes a method of enhancing LVM function, that is, a method that can improve the performance of the logical volume created or expanded: adding the P-C factor in the logical volume object and adding the P-C factor in the physical volume object The P factor is added to the logical volume, so that the physical volume object with a large P value is given priority when creating or expanding the logical volume, and when the largest unmapped physical volume segment size in the physical volume with the largest P value is smaller than the logical volume to be created or expanded When volume size is calculated, the comparison value of different physical volume segments can be further calculated by P-C factor and P factor, which makes it possible not only to consider the continuity of physical blocks but also to consider when creating or expanding logical volumes. The performance of each storage device.

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Abstract

The invention discloses a method for enhancing logical volume management LVM functions, comprising the following steps: respectively setting a P factor of a physical volume and a P-C factor of a logical volume; obtaining the established or expanded logical volume containing the P-C factor and physical volume segments of the mapped physical volume containing the P factor; selecting one physical volume segment with a maximal P value and judging if the size of the physical volume segment is larger than and equal to that of the established or expanded logical volume when the size summation of the physical volume segments is larger than or equal to the size of the established or expanded logical volume; if the size of the physical volume segment is larger than and equal to that of the established or expanded logical volume, mapping the established or expanded logical volume to the physical volume segments; and if the size of the physical volume segment is smaller than that of the established or expanded logical volume, sorting all the physical volume segments according to comparison values, and mapping the established or expanded logical volume to the physical volume segment with the maximal comparison value till the establishment and expansion process of the logical volume is completed. The method not only considers the continuity of physical blocks but also considers the property of storage equipment when the logical volume is established and expanded.

Description

technical field [0001] The invention relates to the field of computer storage device management, in particular to a method for enhancing the function of logical volume management (LVM) in a Linux operating system. Background technique [0002] When installing the Linux operating system, one of the most common problems encountered is how to allocate the appropriate space for the planned storage device partition: if the space allocated for a certain storage device partition is too small, it may cause the storage device partition to fail soon. If the space allocated for the storage device partition is too large, it is likely to cause waste that the storage device partition will not be used for a long time. Therefore, allocating a suitable space for the planned storage device partition has become a top priority for installing the Linux operating system. [0003] At present, LVM is used to solve this problem. LVM is a mechanism for managing storage device partitions in the Linux...

Claims

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Application Information

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IPC IPC(8): G06F3/06
Inventor 宋振华
Owner 宋振华
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