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Databases & Data

The most popular blog posts about databases & data on Hacker News. 2,338 posts.

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1893

Prolly Trees

A deep dive into the Probabilistic B-tree or Prolly Tree data structure including examples. Prolly Trees are used to create version controlled databases.

1900

Prime Day 2017: 12.9M DynamoDB requests per second

The third annual Prime Day set another round of records for global orders, topping Black Friday and Cyber Monday, making it the biggest day in Amazon retail history. Over the course of the 30 hour event, tens of millions of Prime members purchased things like Echo Dots, Fire tablets, programmable pressure cookers…

1901

We collected 10k hours of neuro-language data in our basement

Over the last 6 months, we collected ~10k hours of data across thousands of unique individuals. As far as we know, this is the largest neuro-language dataset in the world. [1] See here , here , here , here , and here (discussion only, no data available) for some of the larger datasets. See recent papers discussing the…

1916

Jepsen: MariaDB Galera Cluster 12.1.2

MariaDB is a popular open source SQL database which began as a fork of MySQL . MariaDB Galera Cluster is an active-active replication system for MariaDB which allows reads and writes on every node. In 2015 this author analyzed MariaDB with Galera Cluster and found that although Galera claimed to offer Snapshot…