# Mondrian OLAP server

> open source OLAP server

**Wikidata**: [Q10331807](https://www.wikidata.org/wiki/Q10331807)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mondrian_OLAP_server)  
**Source**: https://4ort.xyz/entity/mondrian-olap-server

## Summary
Mondrian OLAP server is an open-source online analytical processing (OLAP) server developed in Java. It is distributed under the Eclipse Public License and is maintained by Pentaho. The project was active until 2020, with the latest stable version released in October 2020.

## Key Facts
- **Primary use**: Online analytical processing (OLAP) for data analysis.
- **License**: Eclipse Public License.
- **Latest version**: 9.2.0.0-78, released on October 3, 2020.
- **Programming language**: Java (inception: 1995).
- **Developer**: Pentaho.
- **Source code repository**: [GitHub](https://github.com/pentaho/mondrian).
- **Website**: [http://mondrian.pentaho.org/](http://mondrian.pentaho.org/) (archived).
- **Classification**: Free software.
- **Wikipedia availability**: Available in English, Spanish, Italian, Portuguese, and Russian.

## FAQs
### Q: What is Mondrian OLAP server used for?
A: Mondrian OLAP server is used for online analytical processing (OLAP), enabling complex data analysis and reporting through multidimensional data models.

### Q: Is Mondrian OLAP server still maintained?
A: No, the project was last updated in October 2020, and its development has since ceased.

### Q: What programming language is Mondrian OLAP server written in?
A: Mondrian OLAP server is written in Java, an object-oriented programming language first released in 1995.

### Q: Who developed Mondrian OLAP server?
A: Mondrian OLAP server was developed by Pentaho, a business analytics company.

### Q: Where can I find the source code for Mondrian OLAP server?
A: The source code is available on GitHub at [https://github.com/pentaho/mondrian](https://github.com/pentaho/mondrian).

## Why It Matters
Mondrian OLAP server played a significant role in the open-source business intelligence (BI) and data analytics landscape. As an OLAP server, it provided a platform for multidimensional data analysis, allowing users to query and aggregate data across multiple dimensions. Its open-source nature made it accessible to developers and organizations looking for cost-effective solutions for data analysis. While the project is no longer actively maintained, its legacy remains influential in the evolution of OLAP technologies. Mondrian’s development in Java and its integration with Pentaho’s ecosystem demonstrated the power of open-source collaboration in advancing data analytics capabilities.

## Notable For
- **Open-source OLAP solution**: One of the first open-source OLAP servers, enabling multidimensional data analysis.
- **Java-based architecture**: Leveraged Java’s object-oriented features for robust and scalable data processing.
- **Pentaho integration**: Part of Pentaho’s BI suite, enhancing its data analytics capabilities.
- **Eclipse Public License**: Distributed under a permissive open-source license, encouraging adoption and modification.
- **GitHub repository**: Hosted on GitHub, facilitating community contributions and version control.

## Body
### Overview
Mondrian OLAP server is an open-source project that provides OLAP functionality for analyzing multidimensional data. It was developed in Java and distributed under the Eclipse Public License. The project was maintained by Pentaho, a business analytics company.

### Development and Releases
- **Latest stable version**: 9.2.0.0-78, released on October 3, 2020.
- **Development history**: The project saw multiple releases in September and October 2020, with updates addressing bugs and improvements.
- **Source code**: Available on GitHub, with contributions managed through the platform.

### Technical Details
- **Programming language**: Java, an object-oriented language first released in 1995.
- **License**: Eclipse Public License, allowing free use, modification, and distribution.
- **Website**: Originally hosted at [http://mondrian.pentaho.org/](http://mondrian.pentaho.org/), now archived.

### Classification and Availability
- **Classification**: Free software, enabling users to run, study, change, and distribute the software.
- **Wikipedia presence**: Available in multiple languages, including English, Spanish, Italian, Portuguese, and Russian.

### Legacy and Impact
- **Influence**: Mondrian contributed to the open-source BI and data analytics ecosystem by providing a robust OLAP solution.
- **Discontinuation**: The project was last updated in 2020, marking the end of its active development phase.

## References

1. [Release 9.2.0.0-67. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-67)
2. [Release 9.2.0.0-70. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-70)
3. [Release 9.2.0.0-71. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-71)
4. [Release 9.2.0.0-72. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-72)
5. [Release 9.2.0.0-73. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-73)
6. [Release 9.2.0.0-74. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-74)
7. [Release 9.2.0.0-75. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-75)
8. [Release 9.2.0.0-76. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-76)
9. [Release 9.2.0.0-77. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-77)
10. [Release 9.2.0.0-78. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-78)
11. [Release 9.2.0.0-79. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-79)
12. [Release 9.2.0.0-80. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-80)
13. [Release 9.2.0.0-81. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-81)
14. [Release 9.2.0.0-82. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-82)
15. [Release 9.2.0.0-83. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-83)
16. [Release 9.2.0.0-84. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-84)
17. [Release 9.2.0.0-85. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-85)
18. [Release 9.2.0.0-87. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-87)
19. [Release 9.2.0.0-88. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-88)
20. [Release 9.2.0.0-89. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-89)
21. [Release 9.2.0.0-90. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-90)
22. [Release 9.2.0.0-91. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-91)
23. [Release 9.2.0.0-92. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-92)
24. [Release 9.2.0.0-93. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-93)
25. [Release 9.2.0.0-96. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-96)
26. [Release 9.2.0.0-97. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-97)
27. [Release 9.2.0.0-98. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-98)
28. [Release 9.2.0.0-99. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-99)
29. [Release 9.2.0.0-100. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-100)
30. [Release 9.2.0.0-101. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-101)
31. [Release 9.2.0.0-102. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-102)
32. [Release 9.2.0.0-103. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-103)
33. [Release 9.2.0.0-105. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-105)
34. [Release 9.2.0.0-109. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-109)
35. [Release 9.2.0.0-110. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-110)
36. [Release 9.2.0.0-111. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-111)
37. [Release 9.2.0.0-113. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-113)
38. [Release 9.2.0.0-114. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-114)
39. [Release 9.2.0.0-115. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-115)
40. [Release 9.2.0.0-116. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-116)
41. [Release 9.2.0.0-117. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-117)
42. [Release 9.2.0.0-118. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-118)
43. [Release 9.2.0.0-119. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-119)
44. [Release 9.2.0.0-120. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-120)
45. [Release 9.2.0.0-122. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-122)
46. [Release 9.2.0.0-123. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-123)
47. [Release 9.2.0.0-124. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-124)
48. [Release 9.2.0.0-125. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-125)
49. [Release 9.2.0.0-128. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-128)
50. [Release 9.2.0.0-129. 2020](https://github.com/pentaho/mondrian/releases/tag/9.2.0.0-129)