pentaho/mondrian

Mondrian is an Online Analytical Processing (OLAP) server that enables business users to analyze large quantities of data in real-time. observed · 2026-08-28

github.com/pentaho/mondrian · homepage · Java · NOASSERTION (other) observed · 2026-08-28

Health v2 · maintenance only

77/100

Activity 99
Release rhythm 35
Longevity 100

Flags: no_releases no_license

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.

gap_med: n/a
age_days: 5280
days_rel: n/a
days_push: 7
n_releases_24m: 0

Full methodology

Adoption not part of the score

1174 stars · 722 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Mondrian is an open-source OLAP (Online Analytical Processing) server written in Java that lets business users analyze large volumes of relational data in real time using MDX queries. It includes a core Java library and a desktop Workbench GUI for designing OLAP schemas.

Use cases

run MDX queries against relational data warehouses
serve multidimensional analytics to BI tools
define OLAP cubes and schemas over SQL databases
perform real-time slice-and-dice analysis of large datasets
build a ROLAP server on top of an existing database
design and test Mondrian schemas with a GUI workbench

When to choose

you need an open-source OLAP engine speaking MDX over relational databases
your BI stack (e.g., Pentaho) requires a Mondrian-compatible OLAP server
you want multidimensional aggregation and caching on large SQL datasets

When to avoid

you only need simple SQL reporting without multidimensional modeling
you want a lightweight embedded analytics library rather than a server
your team has no MDX/OLAP expertise and prefers modern columnar engines like ClickHouse or DuckDB

Facets

library · maturity active

database search-engine developer-tools databases analytics big-data data-science jvm cross-platform olap mdx business-intelligence data-warehouse rolap

3 sources

readme: https://github.com/pentaho/mondrian · fetched 2026-08-28 · c64f5547575a
homepage: http://mondrian.pentaho.com/ · fetched 2026-08-29 · c9d6f6fb3412
site_page: https://mondrian.pentaho.com/documentation · fetched 2026-08-29 · 35f022fa7631

Member repositories

Repository	Role	Health v2
pentaho/mondrian	main	77

For agents

markdown · JSON · MCP: product_card(name="pentaho/mondrian")

Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem