0
I Use This!
Activity Not Available

Project Summary

A C++ library implementing column-oriented bitmap indexes.

In its current format, this library indexes flat files to a bitmap-based column store. It can scale up to one hundred million attribute values, and to billions of lines. Support for projection indexes is also available.

For compression, it uses with a form of word-aligned compressin akin to the Word-Aligned Hybrid encoding (WAH) called Enhanced Word-Aligned Hybrid encoding (EWAH) which is particularly suitable to 64-bit processors.

It should build without a problem on MacOS and Linux.

See doc/index.html for the documentation.

Reference:

Daniel Lemire, Owen Kaser, Kamel Aouiche, Sorting improves word-aligned bitmap indexes. Data & Knowledge Engineering 69 (1), pages 3-28, 2010. http://arxiv.org/abs/0901.3751

Slides: http://www.slideshare.net/lemire/all-about-bitmap-indexes-and-sorting-them

Tags

bitmapindex database indexing prototype

In a Nutshell, lemurbitmapindex...

 No code available to analyze

Open Hub computes statistics on FOSS projects by examining source code and commit history in source code management systems. This project has no code locations, and so Open Hub cannot perform this analysis

Is this project's source code hosted in a publicly available repository? Do you know the URL? If you do, click the button below and tell us so that Open Hub can generate statistics! It's fast and easy - try it and see!

Add a code location

GNU General Public License v3.0 or later
Permitted

Commercial Use

Modify

Distribute

Place Warranty

Use Patent Claims

Forbidden

Sub-License

Hold Liable

Required

Distribute Original

Disclose Source

Include Copyright

State Changes

Include License

Include Install Instructions

These details are provided for information only. No information here is legal advice and should not be used as such.

This Project has No vulnerabilities Reported Against it

Did You Know...

  • ...
    there are over 3,000 projects on the Open Hub with security vulnerabilities reported against them
  • ...
    you can embed statistics from Open Hub on your site
  • ...
    65% of companies leverage OSS to speed application development in 2016
  • ...
    data presented on the Open Hub is available through our API

 No code available to analyze

Open Hub computes statistics on FOSS projects by examining source code and commit history in source code management systems. This project has no code locations, and so Open Hub cannot perform this analysis

Is this project's source code hosted in a publicly available repository? Do you know the URL? If you do, click the button below and tell us so that Open Hub can generate statistics! It's fast and easy - try it and see!

Add a code location

Community Rating

Be the first to rate this project
Click to add your rating
   Spinner
Review this Project!
Sample ohloh analysis