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On-line capacity-enlarging system and method for magnetic disc array

A disk array, read and write request technology, applied in the computer field, can solve problems such as capacity expansion read and write requests and user read and write request conflicts, so as to avoid long-term occupation of hot spare disk resources, improve host response speed, and reduce read and write performance. effect of influence

Inactive Publication Date: 2008-07-23
ZTE CORP
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Problems solved by technology

[0007] The present invention provides an online capacity expansion system and method of a disk array, so as to realize the online capacity expansion of the disk array, solve the problem of conflict between expansion read and write requests and user read and write requests, and process user read and write requests in real time during the expansion process without occupying additional Disk storage space, and effectively handle unexpected stop events during the expansion process

Method used

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  • On-line capacity-enlarging system and method for magnetic disc array
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  • On-line capacity-enlarging system and method for magnetic disc array

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Embodiment Construction

[0032] In order to describe the system and method included in the present invention more clearly, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] The invention provides an online expansion system and method of a disk array, which realizes online expansion of the storage capacity of the disk array, and designs a special module to process user read and write requests that generate read and write conflicts, so as to ensure that the user read and write requests are not blocked during the expansion operation.

[0034] As shown in FIG. 1 , the system in the present invention includes a read-write request processing module, a read-write conflict processing module, a capacity expansion process control module and a capacity expansion buffer. The expansion process control module receives the expansion command, generates an expansion read and write request, and controls the expansion buffer to complet...

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Abstract

The invention discloses an online expansion system of disk array and a relative method, which can effectively treat the impacted user read and write requests to effectively eliminate user waiting in expansion, and uses bit map to record the progress of the expansion operation and the expansion states of different addresses, thereby effectively reducing the expansion effect on read and write functions to effectively improve the host response speed in expansion process. The invention is suitable for online expansion of disk array capacity of computer storage system.

Description

technical field [0001] The invention relates to the computer field, in particular to a system and method for online expansion of computer storage system capacity. Background technique [0002] Disk array (Redundant Array of Independent Disk, RAID, hereinafter referred to as RAID) is a redundant array composed of multiple independent disks, which appears as an independent large-scale storage device under the operating system. RAID can improve the speed of the storage system, increase the capacity, provide fault tolerance to ensure data security, and is easy to manage. [0003] RAID implements the function of reading and writing across disks, divides data into multiple data blocks and writes them to multiple disks in parallel or reads data blocks from multiple disks at the same time to form data to improve the speed of accessing disks, and provides data through mirroring or verification operations. Data fault tolerance. Commonly used RAID levels include RAID0, RAID1, RAID3, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
Inventor 王佳
Owner ZTE CORP
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