# nathanmarz/cascalog

Data processing on Hadoop without the hassle.

Repository: https://github.com/nathanmarz/cascalog
Canonical: https://ross.abutalabs.com/products/cascalog
Language: Clojure
License: NOASSERTION
License Family: other
Last push: 2023-05-18T22:49:55+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 6000, "days_push": 1203, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1373, forks 173 (observed 2026-08-28T04:04:32.813986+00:00)

## What it is
Cascalog is a Clojure/Java data processing and querying library built on Hadoop, offering a high-level Datalog-like abstraction as a replacement for Pig, Hive, and Cascading. It also supports local in-memory analysis from the REPL.

## Use cases
- run big data queries on hadoop without writing mapreduce
- replace pig or hive with a clojure dsl
- analyze datasets locally from the repl
- process large log data with clojure
- write declarative data pipelines in java

## When to choose
- you're on the JVM and want a high-level query language over Hadoop
- you prefer Clojure REPL-driven data analysis

## When to avoid
- starting a new project — modern alternatives like Spark or trino are actively maintained
- you need non-Hadoop distributed execution

## Facets
- artifact type: library
- maturity: maintenance
- function: etl, data-science
- domain: big-data
- platform: jvm, jvm-scripting
- tags: hadoop, datalog, clojure, big-data, mapreduce, query, data-engineering

## Member repositories
- nathanmarz/cascalog (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:32.813986+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:40:43.024389+00:00, confidence not recorded.
  - readme: https://github.com/nathanmarz/cascalog (fetched 2026-08-28T04:04:32.813986+00:00, sha 8f7d197e0746)
- Data as of 2026-08-30T08:39:29.467469+00:00.