Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Expandable Bloom filter enquiring method and element inserting method thereof

A query method and filter technology, applied in the field of extensible Bloom filter query method and its element insertion, can solve the problems of high query time complexity, rapid growth rate of misjudgment rate, limited degree of mitigation, etc.

Inactive Publication Date: 2007-12-05
HUNAN UNIV
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this method of linearly expanding vectors is actually used, as the number of elements increases, the number of vectors increases rapidly, the false positive rate increases rapidly, and the degree of relief is limited.
At the same time, the query time complexity of such methods is high, and there is still room for improvement in the query time complexity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Expandable Bloom filter enquiring method and element inserting method thereof
  • Expandable Bloom filter enquiring method and element inserting method thereof
  • Expandable Bloom filter enquiring method and element inserting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0131] This embodiment provides a H-based 3 Extensible Bloom filter implemented by hash function, in which H 3 Hash function is a kind of universal hash function (universal Hash) defined by Carter and Wegman. h 3 The function has a strong hash property and is a common implementation function of Bloom filter; and because the hash calculation of each input element only requires simple "AND" and "XOR" operations, it is convenient Implementations, especially hardware implementations, are among the most commonly used hash functions for computer hardware.

[0132] h 3 A hash function is a linear transformation B T =Q r×w A T , the element A=a of w-bit length 1 a 2 La w Hash address converted to r-bit B=b 1 b 2 Lb r ,Right now

[0133] b 1 b 2 M ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an inquiring method of scalable Bloom filter and element inserting method of the inquiring method of scalable Bloom filter, which is characterized by the following: adding filter with length increased times by times to keep low error judging rate under data set element increasing condition; controlling the error judging rate at 1%; obtaining the one-time element inquiring time at 20us in the CPU machine at 3.0GHz with faster speed than DBF inquiry; possessing widely applying prospect due to supporting dynamic expansion of set.

Description

technical field [0001] The invention relates to the technical field of distributed computing, in particular to an application in which a large amount of data is generated by a distributed system and requires interactive query, and specifically relates to an extensible Bloom filter query method and an element insertion method thereof. Background technique [0002] With the rapid development of computing technology and the Internet, the amount of data continues to increase, the heterogeneity and complexity of the network continue to increase, and the increasingly diverse and complex computer environment requires multiple levels of form, scale, function and performance. Conduct scalability research on computing systems. The scalability of storage systems is a hotspot in current computer research. The Bloom filter uses a bit string to represent the data set and can effectively support the hash lookup of the elements. It is a concise data structure that can represent the set and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 谢鲲闵应骅张大方文吉刚谢高岗
Owner HUNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com