This article gives an overview of the implementation and performance of two recent additions to LocustDB, an extremely fast open-source analytics database built in Rust. The first addition is support for persistent storage, the second is an lz4 compression pass for data stored on disk or cached in memory. Benchmarking LocustDB on a dataset of 1.46 billion taxi rides demonstrates excellent performance for cold queries, reaching > 95% of sequential read speed on SSD and > 70% of sequential read speed on HDD. Comparing to ClickHouse, queries with similar data volume are as fast or faster, and disk space usage is reduced by 40%.
This article gives an overview of LocustDB , a new and extremely fast open-source analytics database built in Rust. Part 1 gives some background on analytical query systems and my goals for LocustDB. Part 2 presents benchmark results produced on a data set of 1.46 billion taxi rides and demonstrates median speedups of 3.6x over ClickHouse and 2.1x over tuned kdb+. Part 3 is an architecture deep dive that follows two SQL statements through the guts of the query engine. Part 4 concludes with random learnings, thoughts on Rust, and other incoherent ramblings. Continue reading
Ever since I began working on CodeCraft, I wanted to implement a multiplayer mode which would allow players anywhere in the world to pit their AIs against each other. With most other parts of CodeCraft taking shape, I now spent some time working on that aspect of the game. In this post I want to talk about some of the design challenges and outline my plans for multiplayer. Continue reading
CodeCraft now has a twitter account which I will use for frequent updates about new features. I think Twitter is a nice fit for this, and I should also be able to integrate the feed into the website which is neat. I will still use this blog whenever I have more substantial content.
Getting this to work was surprisingly easy, mad props to everyone behind Scala.js for creating such an awesome piece of technology.
More than a hundred people clicked through to the CodeCraft tutorial over the last few days, which is a nice start. I don’t have any other statistics though, so I have very little visibility into how many of those are actually using CodeCraft, or don’t know/like Scala/Java, or think the idea or implementation suck, or don’t have the time/patience to perform all of the setup and go thought the tutorial. If you have any thoughts on CodeCraft, do share them, it really helps me figure what I need to be working on!
Today, I am releasing the alpha version of the real-time strategy programming game CodeCraft. (previously called CodingGame, but I want to avoid confusion with codinggame.com). This is the first public release, so there will be various bugs, rough edges and missing features, but all the core functionality is there now. There will be regular releases from now on to incorporate your feedback.
I put up a tutorial and overview of the API on github, so if you want to give it a try go on and head over there. Currently, CodeCraft can be used with both Scala and Java. Happy coding!
Edit: Didn’t quite manage to finish everything today, so release will be tomorrow (Friday), or on Monday at the latest.
The game mechanics, API and graphics for CodingGame are starting to look decent, and I am now ramping up for an alpha release on June 11. Until then, I will be tying up various loose ends and complete the following remaining tasks: Continue reading