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apache
cassandra
Java2013–2025
apache / cassandra

cassandra

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

Data & DatabasesSystems & InfrastructureHardware & EmbeddedDevOps & Cloud
Explore on GitHubRead Hacker News discussions
6Distinct people
7Mentions
0Explicit recommenders
10.2KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

GitHub

Where it is used

No documented product use has been verified yet.

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, 1:49:46 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 year7 dated mentions

Observed mentions: 2013-01-08 04:47:58 UTC to 2025-02-22 18:12:13 UTC.

01232013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 3 mentions; 0 submissions, 3 comments20132014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments20192020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2021-01-01 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): 1 mentions; 0 submissions, 1 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
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC303
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC000
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC000
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC101
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC000
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC000
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC101
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC000
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 UTC101
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

7 sources
_benedict·Feb 22, 2025
We have something very similar[1] we use in the Apache Cassandra project to test complex cluster behaviours. We appear to use exactly the same basic technique, using byte weaving to intercept concurrency primitives such as synchronized, LockSupport etc to pause the system thread and run them on some schedule. We only currently run (deterministic) probabilistic traces though, we can’t search the interleaving space. But the traces for a whole cluster are extremely complex and probably unsearchable. I have been meaning to publish it for broader consumption for years now, but there’s always something more important to do. It’s great to see some dedicated efforts in this space. [1] https://github.com/apache/cassandra/tree/trunk/test/simulato...
In Concurrency bugs in Lucene: How to fix optimistic concurrency failures
kaivi·Nov 22, 2019
>Somewhat ironically Elasticsearch would probably work really well for this too (just make sure your elasticsearch isn't open to the world on the internet!). Sure it will work, but I personally don't like Elasticsearch for anything high-intensity because of its HTTP REST API and the overhead it carries. Take a look at Cassandra's [1] "CQL binary protocol", it simple and always on point. [1] https://github.com/apache/cassandra/blob/trunk/doc/native_pr...
In Personal and social information of 1.2B people discovered in data leak
nemothekid·Jan 29, 2016
There is no way to configure mirrors with the project-specific tooling (AFAIK). Git, (and like most other DVCS) supports mirroring. For example Linux, hosted on Github, (https://github.com/torvalds/linux/commits/master) is also mirrored and hosted on kernel.org (https://git.kernel.org/cgit/). Or, the apache projects (https://github.com/apache/cassandra), which are also hosted on apache.org (https://git-wip-us.apache.org/repos/asf?p=cassandra.git). Generally when commits are merged with upstream, they are mirrored to all other hosts. The tools, however, are generally configured with only the GitHub address (or the author of the tool only publishes to GitHub), and the tools (unlike say Perl's CPAN) don't offer to maintain mirrors of the libraries published. So when github is down, a tool like npm will give up, even though the author could h
Read the rest
ave another git repo host elsewhere.
In Update on 1/28 service outage

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