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Storage system, method for reading data from storage system and method for writing data to storage system

A storage system and stripe technology, which is applied in the storage field and can solve complex problems

Inactive Publication Date: 2011-04-20
HUAWEI DIGITAL TECH (CHENGDU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complexity of configuring SSD as a cache storage system is high

Method used

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  • Storage system, method for reading data from storage system and method for writing data to storage system
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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] figure 1 A schematic structural diagram of a storage system provided by an embodiment of the present invention. The system may include: a controller 11 , a first hard disk 12 , and a solid-state hard disk (SSD group 13 ) allocated for the storage space corresponding to the LUN of the first hard disk 12 . The first hard disk 12 can be a RAID 5 hard disk, a RAID0 hard disk, a RAID1 hard disk, or the like. Assuming that the first hard disk 12 is partitio...

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Abstract

The invention relates to a storage system, a method for reading data from the storage system and a method for writing data to the storage system. The system comprises a controller, a first hard disk divided with strips of redundant arrays of inexpensive disks and also a solid state disk set. The solid state disk set is assigned as the storage space corresponding to a logic unit number of the first hard disk, and is classified as a set of strips of redundant arrays of inexpensive disks. The strips of the redundant arrays of the inexpensive disks of the solid state disk set and those of the first hard disk have the same strip depth and the same strip size. The controller preserves Hash mapping tables used for expressing the mapping relation between the storage space and the solid state disk set. Hash mapping table items include indexes, pointer domains and bitmap domains. The controller also preserves analytic functions which are used for resolving an initial address of read-write requests to the indexes of the Hash mapping tables.

Description

technical field [0001] The present invention relates to the technical field of storage, in particular to a storage system, a method for reading data from the storage system, and a method for writing data. Background technique [0002] A cheap disk array (Redundant Arrays of Inexpensive Disks, RAID) forms a hard disk group (logical hard disk) by combining multiple independent hard disks (physical hard disks) in different ways to provide higher storage performance than a single hard disk and provide Data backup function. [0003] With the continuous development of RAID technology, a hard disk group built according to the RAID5 level mode appears, that is, data and check digits are stored on all hard disks in an interval distribution, so as to achieve better load balance. The hard disk group is also a logical hard disk. For the convenience of description, the logical hard disks are named according to the construction level. For example, the logical hard disk constructed accord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G06F12/02
Inventor 林宇张巍
Owner HUAWEI DIGITAL TECH (CHENGDU) CO LTD
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