Viewing profile — willglynn

Glorious: https://seri.tools/blog/announcing-rust9x/

AWS has the notion of "partitions", which is a technical boundary encompassing multiple regions. This mostly doesn't come up, but it does poke through in certain implementation det…

For example, "An HTTP Status Code to Report Legal Obstacles": https://datatracker.ietf.org/doc/html/rfc7725

This was TAMDAR data, which is a self-contained instrument package intended specifically for meteorological observations. https://en.wikipedia.org/wiki/TAMDAR Observations definite…

You might be interested in https://burn.dev , a Rust machine learning framework. It has CUDA and ROCm backends among others.

Yes! Exactly this. My last EV used 22 MWh over 6.5 years. That works out to 390W. My solar array is located at high latitudes (northern Minnesota), the mounting angle isn't great, …

I've had great results with N100 mini PCs including Power over Ethernet. Here's an N100, PoE, 2.5GBASE-T, case, 8 GB RAM, 128 GB SSD for $129 refurbished: https://refurbished.minis…

This is not discretionary for the FCC: > A station authorization shall be automatically terminated in whole or in part without further notice to the licensee upon: > … > (d) The fa…

ESPHome fills much of this niche for me. It's a framework for turning YAML device definitions into custom microcontroller firmware, with myriad supporting tools. The official devic…

On the topic of fail-deadly nukes: https://en.wikipedia.org/wiki/Dead_Hand

This is true for many but not all weather models. GFS and IFS are both medium-range global models in the class Google is targeting. These models are spectral models, meaning they p…

You're right, and in fact S3 does this with the `ETag:` header… in the simple case. S3 also supports more complicated cases where the entire object may not be visible to any single…

It is common to use multipart uploads for large objects, since this both increases throughput and decreases latency. Individual part uploads can happen in parallel and complete in …

> In Rust, the main thread is special. (I consider this unfortunate, but web people like it, because inside browsers, the main thread is very special.) If the main thread exits, al…

Global lat/long coordinates are defined in terms of coordinate systems like WGS84 or ITRF2020, which are themselves the result of relative measurements between reference stations. …

The document to which this article refers was published in the Journal of the Royal Society Interface, and the article links there. It is also available as open access, which was n…

It's… fine? Unlike certain other brands, I've encountered no network of frothing, territorial, gatekeeping dealers with Beckhoff. For my project, I reached out to sales.usa@beckhof…

Seconding Beckhoff. EtherCAT is a fantastic protocol, TwinCAT/BSD works great, reliability is excellent. It's super nice to run realtime PLC code on specific processor cores with µ…

Thirded. I connected my stations' local UDP broadcasts to Prometheus push/VictoriaMetrics: https://github.com/willglynn/tempest_exporter Their central web API is nice too (and the …

The best treatment is at: https://blog.rust-lang.org/2024/03/30/i128-layout-update.htm... Note also that this involves LLVM, so clang < 18 had the same u128 behavior as Rust < 1.77…

Large single family homes have 400A 1Ø 120/240V service, which is 96 kW peak or 76.8 kW for NEC's definition of continuous. Most have 200A service or smaller, which is half that. W…

Be aware that there's N100 boards with 6x SATA, 2x M.2 NVMe, and 4x 2.5GBASE-T around this price point. For example: https://www.aliexpress.us/item/3256806198066931.html The N100 p…

The hardware minimums are real, and the complexity floor is significant. Do not deploy Ceph unless you mean it. I started considering alternatives when my NAS crossed 100 TB of HDD…

In 2024 I would suggest deploying 2x25G instead, via e.g. MCX4121. Pricing is similar ( * 2x25G throughput is higher than 40G, * 25G latency is lower than 40G, * you can use 25G po…