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gchq
Gaffer
Java2015–2025
gchq / Gaffer · Archived

Gaffer

A large-scale entity and relation database supporting aggregation of properties

13Distinct people
14Mentions
0Explicit recommenders
1.8KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

A large-scale entity and relation database supporting aggregation of properties

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year14 dated mentions

Observed mentions: 2015-12-14 18:02:56 UTC to 2025-11-18 01:52:09 UTC.

0123452015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 comments20152016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 5 mentions; 1 submissions, 4 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments20202021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2025

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC312
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC514
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC101
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC101
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC211
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC110
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC000
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC000
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC000
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC000
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC101

What Hacker News says

14 sources
I would start looking at gephi: https://gephi.org and sigma.js for visualization. To run influence or social network analysis I would look at R's igraph: http://igraph.org/r/ or spark graphx: http://spark.apache.org/docs/latest/graphx-programming-guide... . For the graph database. neo4j , elasticsearch or the open source graph database created by the uk intelligence service: https://github.com/gchq/Gaffer . Another interesting project is mazerunner that integrates spark graphx and neo4j together : https://neo4j.com/developer/apache-spark/#mazerunner
In Ask HN: Is there an open source equivalent to Palantir?
Not sure what you'd do with a tomahawk (besides hump it for fortitude). Anyway... In the US the policy is: A United States government work is prepared by an officer or employee of the United States government as part of that person's official duties. It is not subject to copyright in the United States and there are no copyright restrictions on reproduction, derivative works, distribution, performance, or display of the work. Anyone may, without restriction under U.S. copyright laws: - reproduce the work in print or digital form - create derivative works - perform the work publicly - display the work - distribute copies or digitally transfer the work to the public by sale or other transfer of ownership, or by rental, lease, or lending. Source: https://www.usa.gov/government-works US government based software developer agencies like 18f and
Read the rest
USDS (United States Digital Service) license all of their code to the public domain. The UK is slightly different: https://github.com/GovernmentCommunicationsHeadquarters/Gaff... But there is the OGL (Open Government License): http://www.nationalarchives.gov.uk/information-management/re...
In Gaffer: Large-scale graph database by GCHQ
From [1]: > Gaffer stores data in Accumulo, but inserting data and retrieving it again requires the user to have no knowledge of Accumulo. As Gaffer stores data in Accumulo, it is horizontally scalable so that very large data sets can be dealt with. It has an API that allows users to retrieve the data they care about, filtered according to their requirements and aggregated over the time window of interest. It supports bulk update and continuous update. Seems like a very useful tool, especially if you already have accumulo infrastructure running. Docs need a bit more work I feel, but it's not terrible for a single page. [1]: https://github.com/GovernmentCommunicationsHeadquarters/Gaff...
In Gaffer: Large-scale graph database by GCHQ

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