MIMichielvv·Dec 20, 2013Submission
Easy to read explanation of convergent replicated data types
2 points · Open discussionaphyr
meangirls
Ruby2012–2013
aphyr / meangirls
meangirls
Convergent Replicated Data Types
2Distinct people
2Mentions
0Explicit recommenders
664GitHub stars
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What it is
Convergent Replicated Data Types
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What people are saying
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
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Mentions over time
HN mentions by month2 dated mentions
Observed mentions: 2012-05-14 23:03:23 UTC to 2013-12-20 11:16:26 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| May 2012 | 2012-05-01 00:00:00 UTC | 2012-06-01 00:00:00 UTC | 1 | 0 | 1 |
| Jun 2012 | 2012-06-01 00:00:00 UTC | 2012-07-01 00:00:00 UTC | 0 | 0 | 0 |
| Jul 2012 | 2012-07-01 00:00:00 UTC | 2012-08-01 00:00:00 UTC | 0 | 0 | 0 |
| Aug 2012 | 2012-08-01 00:00:00 UTC | 2012-09-01 00:00:00 UTC | 0 | 0 | 0 |
| Sep 2012 | 2012-09-01 00:00:00 UTC | 2012-10-01 00:00:00 UTC | 0 | 0 | 0 |
| Oct 2012 | 2012-10-01 00:00:00 UTC | 2012-11-01 00:00:00 UTC | 0 | 0 | 0 |
| Nov 2012 | 2012-11-01 00:00:00 UTC | 2012-12-01 00:00:00 UTC | 0 | 0 | 0 |
| Dec 2012 | 2012-12-01 00:00:00 UTC | 2013-01-01 00:00:00 UTC | 0 | 0 | 0 |
| Jan 2013 | 2013-01-01 00:00:00 UTC | 2013-02-01 00:00:00 UTC | 0 | 0 | 0 |
| Feb 2013 | 2013-02-01 00:00:00 UTC | 2013-03-01 00:00:00 UTC | 0 | 0 | 0 |
| Mar 2013 | 2013-03-01 00:00:00 UTC | 2013-04-01 00:00:00 UTC | 0 | 0 | 0 |
| Apr 2013 | 2013-04-01 00:00:00 UTC | 2013-05-01 00:00:00 UTC | 0 | 0 | 0 |
| May 2013 | 2013-05-01 00:00:00 UTC | 2013-06-01 00:00:00 UTC | 0 | 0 | 0 |
| Jun 2013 | 2013-06-01 00:00:00 UTC | 2013-07-01 00:00:00 UTC | 0 | 0 | 0 |
| Jul 2013 | 2013-07-01 00:00:00 UTC | 2013-08-01 00:00:00 UTC | 0 | 0 | 0 |
| Aug 2013 | 2013-08-01 00:00:00 UTC | 2013-09-01 00:00:00 UTC | 0 | 0 | 0 |
| Sep 2013 | 2013-09-01 00:00:00 UTC | 2013-10-01 00:00:00 UTC | 0 | 0 | 0 |
| Oct 2013 | 2013-10-01 00:00:00 UTC | 2013-11-01 00:00:00 UTC | 0 | 0 | 0 |
| Nov 2013 | 2013-11-01 00:00:00 UTC | 2013-12-01 00:00:00 UTC | 0 | 0 | 0 |
| Dec 2013 | 2013-12-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
2 sourcesThere are a several ways to approach this. The simplest is to just take last-write-wins, which is the only option some distributed databases give you. For cases where this isn't ideal, you resolve write-conflicts in a couple ways.
One way is to write domain-specific logic that knows how
to resolve your values. For example, your models might
have some state that only happen-after another state,
so conflicts of this nature resolve to the 'later' state.
Another approach is to use data-structures or a library
designed for this, like CRDTs. Some resources below:
A comprehensive study of Convergent and Commutative Replicated Data Types
http://hal.archives-ouvertes.fr/inria-00555588/
https://github.com/reiddraper/knockbox
https://github.com/aphyr/meangirls
https://github.com/ericmoritz/crdt
https://github.com/mochi/statebox
In Migrating From MongoDB To Riak At Bump