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Databases & Data

The most popular blog posts about databases & data on Hacker News. 269 posts.

2020
245

Elastic 7.9

Elastic 7.9 (Elastic Stack: Elasticsearch, Kibana, Logstash, Beats) delivers new capabilities to market. Get started with a new free tier of Workplace Search, part of Elastic Enterprise Security, and ...

248

Three Types of Data

In my work I’ve developed a mental framework related to data modeling, which has helped greatly both when coming up with a model and when making decisions down the road about how to use that model. Here I will establish three different categories of data in software: Constants, State, and Cached Values. By “data” I…

249

Holes in Bayesian Statistics

Every philosophy has holes, and it is the responsibility of proponents of a philosophy to point out these problems. Here are a few holes in Bayesian data analysis: (1) the usual rules of conditional probability fail in the quantum realm, (2) flat or weak priors lead to terrible inferences about things we care about…

255

Understanding Raft Consensus

Recently I was digging deeper into Raft , an important algorithm in the field of distributed systems. Raft is a consensus algorithm , meaning that it is designed to facilitate a set of computers agreeing on a state of the world (more on exactly how the state of the world is represented later), even when communications…

263

Scaling Datastores at Slack with Vitess

From the very beginning of Slack, MySQL was used as the storage engine for all our data. Slack operated MySQL servers in an active-active configuration. This is the story of how we changed our data storage architecture from the active-active clusters over to Vitess — a horizontal scaling system for MySQL. Vitess is…

265

Amazon S3 Update – Strong Read-After-Write Consistency

When we launched S3 back in 2006, I discussed its virtually unlimited capacity (“…easily store any number of blocks…”), the fact that it was designed to provide 99.99% availability, and that it offered durable storage, with data transparently stored in multiple locations. Since that launch, our customers have used S3…