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Data filtering method, device and data reading system

A data and data block technology, applied in the storage field, can solve the problems of increasing system resource overhead and affecting the processing efficiency of storage resources, and achieve the effect of reducing overhead and improving processing efficiency

Active Publication Date: 2018-10-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Unallocated space of Thin LUN
Therefore, it will increase the overhead of system resources and affect the processing efficiency of storage resources.

Method used

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  • Data filtering method, device and data reading system
  • Data filtering method, device and data reading system
  • Data filtering method, device and data reading system

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0051] It should be understood that although the terms first, second, etc. may be used to describe each forwarding port or module in this embodiment of the application, the forwarding port or module should not be limited to these terms. These terms are only used to distinguish forwarding ports or modules from one another. For example, without departing from the scope of the embodiments of the present application, the first data block can also be called the second data block, and similarly, the ...

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PUM

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Abstract

The application discloses a data filtering method, and device and a data reading system with the aim of increasing processing efficiency of data storage. The data filtering method comprises following steps: creating a target snaphot for a source book; comparing differences between the target snaphot with a benchmark snaphot in order to obtain a comparison result used for recoding difference data; receiving a bitmap searching instruction sent by a host, wherein the bitmap searching instruction is used for searching a bitmap of effective data for the target snaphot; generating the bitmap of effective data based on generation data, wherein positions for effective data of the target snaphot can be recorded in the the bitmap of effective data; and sending the bitmap of effective data to the host.

Description

technical field [0001] The present application relates to the field of storage, in particular to a data filtering method, device and data reading system. Background technique [0002] A logical unit number (Logical Unit Number, LUN) is an independent storage unit on a storage device that can be recognized by an application server. The space of a LUN comes from the storage pool, and the space of the storage pool comes from several hard disks that form the disk domain. At the application server level, a LUN can be regarded as a usable hard disk. Thick LUN (traditional non-thin LUN) and Thin LUN (thin LUN) are a type of LUN respectively, which support virtual resource allocation and can be created, expanded, and compressed in a relatively simple manner. Both thick LUN and thin LUN will generate invalid data space. Invalid data space is the logical space occupied by invalid data in the LUN. The logical space occupied by this part of invalid data has not allocated corresponding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/06G06F3/06
CPCG06F3/0629G06F12/0646
Inventor 梁峰周江鲤曾强胡伟朱磊龙红梅
Owner HUAWEI TECH CO LTD