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Index data storage method, device and storage device

A technology for indexing data and indexing, which is applied in the field of data processing and can solve problems such as low compression efficiency

Active Publication Date: 2017-08-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the actual application process, the existing schemes for compressing index data have limitations. The reason is that if there are few common prefixes available between index values, the existing database compresses index data when compressing low efficiency

Method used

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  • Index data storage method, device and storage device
  • Index data storage method, device and storage device
  • Index data storage method, device and storage device

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Embodiment Construction

[0092] 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 creative efforts fall within the protection scope of the present invention.

[0093] An index data storage method provided by an embodiment of the present invention, the method flow is as follows figure 1 shown, including:

[0094] 101. Obtain all original index data groups in a single page.

[0095] The single page refers to a single data storage page for storing index data.

[0096] Wherein, a single original index data group refers to a storage form of a single index record stored in a page, including the tuple address and index value c...

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Abstract

The invention discloses an index data storage method and relates to the field of data processing. By compression of index pages, system storage space is reduced, and number of index records on each index page is increased. The index data storage method includes: acquiring all raw index data sets in a single page, creating an index bitmap in the single page, and determining and storing a minimum index value in the single page; subtracting the minimum index value from each index value to calculate difference values delta1, setting a flag bit of the delta1th position in the index bitmap, then deleting the index values in each raw index data set, and after compressed index data sets including only tuple addresses are generated, restoring the compressed index data set corresponding to each raw index data set in the single page according to the higher-lower bit sequence of the delta1, corresponding to the index values, in the index bitmap so as to complete index compression. The n index data storage method is mainly applied to the process of index data storage.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a storage method, device and storage device for index data. Background technique [0002] At present, in order to improve the performance of the database and reduce the storage space occupied by the data, it is generally necessary to compress the data stored in the database. Index data is a kind of basic data type in the database. The corresponding existing compression technology usually builds a dictionary by extracting the common prefix part of the index value recorded in the index data, and replaces the repeated records with the reference of the dictionary entries to reduce storage. space. [0003] However, in the actual application process, the existing schemes for compressing index data have limitations. The reason is that if there are few common prefixes available between index values, the existing database compresses the index data when compressing low productivity. Cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06F16/2237
Inventor 陆嘉恒杨宁刘泽隶安泽林李海丰
Owner HUAWEI TECH CO LTD
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