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njs12345on Shardines: SQLite3 Database-per-Tenant with ActiveRecord

When not per tenant you still have this problem, and typically resolve by releasing database migrations separately to the code that uses changes (ensuring backwards compatibility).

I guess per-tenant you would handle similarly but build some tooling to monitor the state of migrations. It might even be easier in some ways, as you might be more able to take table locks when migrating per-tenant.

njs12345on The Closing of the Bulgarian Frontier

Confessionalism is probably just as large a confounder as communism in this context though..

njs12345on From S3 to R2: An economic opportunity

There is the Images Batch API that isn't subject to the 1200 requests/5 minutes limit: https://developers.cloudflare.com/images/cloudflare-images/u...

njs12345on Making Rust supply chain attacks harder with Cackle

I could see a combination of this approach and one of the audit approaches like `cargo crev` working well in the unsafe case:

- Require audit if there is new unsafe code

- Otherwise, rely on cackle to enforce no use of fs/net etc in safe Rust

This could provide the best of both worlds, automating most of the audit burden while still providing strong guarantees.

njs12345on Privatisation has been a costly failure in Britain

The lenders will come out alright. Even if the utilities end up being renationalised their debt will be converted into government bonds. The mugs here are the public, which end up paying to service the debt that has been used to issue dividends.

njs12345on Westinghouse sees a tech disrupter in its eVinci microreactor

https://ourworldindata.org/grapher/carbon-intensity-electric...

With an ageing nuclear fleet built mostly in the 70s and 80s France has the cleanest electricity of any country in Europe (except those with abundant hydro).

njs12345on Planning Go 1.20 cryptography work

A good place to start with Coq is Software Foundations: https://softwarefoundations.cis.upenn.edu/

njs12345on Twenty years of Valgrind

The atomics themselves sure, but I guess often they'll be used as a barrier to protect an UnsafeCell or something, like in the implementation of Lazy<T>: https://docs.rs/lazy-init/0.5.0/src/lazy_init/lib.rs.html#85

njs12345on Twenty years of Valgrind

> Even rust's memory model has places where it can't do what C++ can. (you can't use atomic to write data from two different threads at the same time)

Perhaps not in safe Rust, but can you provide an example of something Rust can't do that C++ can? It has the same memory model as C++20: https://doc.rust-lang.org/nomicon/atomics.html

njs12345on Nothing like this will be built again (2002)

China has just hooked a pebble bed reactor up to its grid: https://en.wikipedia.org/wiki/HTR-PM

njs12345on An UPDATE without a WHERE, or something close to it

A fun Postgres extension to require this: https://github.com/eradman/pg-safeupdate

njs12345on Ask HN: Who is hiring? (May 2021)

Football Radar | Systems Engineer | London | Remote (UK) | Full-time

We're looking for an experienced Systems Engineer / Site Reliability Engineer to help us deliver high quality software and shape our technical roadmap over the coming years.

The Development department consists of 20 developers across 4 sub-teams: Analysis, Modelling, Systems and Trading. As part of the Systems team, you'll get the opportunity to enhance our DevOps culture, taking our collaboration and automation to the next level. We're on a mission to improve stability and standardisation, and shorten feedback loops in order to make our team more efficient in delivering business value. We're also looking for someone who can help us integrate security considerations into our development process.

Find out more about Football Radar and the role here: https://footballradar.recruiterbox.com/jobs/fk0mg3u/

njs12345on The public has a right to know how companies that pay no taxes pull it off

Land value taxes also seem like they would work very well, have some nice incentive effects and are hard to game: https://en.wikipedia.org/wiki/Land_value_tax

njs12345on The Next Step for Generics

This isn't quite the same, because it's just an alias - you can pass a UserID to a function accepting a PostID: https://play.golang.org/p/nSOgcJs_66y

It still provides a documentation benefit of course.

EDIT: Whoops, yes, as lentil points out, they are indeed distinct types not aliases. So it does provide the benefit of the Rust solution.

njs12345on U.S. trails most developed countries in voter turnout (2018)

We have to register to vote in the UK: https://www.gov.uk/electoral-register

The same sort of dogwhistles about 'voter fraud' have been getting airtime in the media as well so I'm sure it won't be long before we have widespread disenfranchisement, just like in the US.

njs12345on Faster internet is coming, but only for a few

Just count yourself lucky that you don't have an Exchange Only (EO) line, that doesn't have a cabinet and runs directly to the exchange.. I'm in Whitechapel (Zone 1) and get 8/1

njs12345on Compare career levels across companies

I agree in general with your comment, but..

> If you can already tell ahead of time which company's stocks are going up, just take more cash and use it to buy those stocks.

These are pre-IPO companies so you can't easily buy their shares.

njs12345on Is Type 2 Diabetes Reversible at Scale?

It might not necessarily be high in fat - it's probably the calorie restriction that works, as in this trial:

https://www.nhs.uk/news/diabetes/radical-low-calorie-diet-ma...

njs12345on What I wish I knew when I became CTO

If you have any concurrency in your system then you aren't going to cover all the states using unit tests. You'll need some sort of formal model for that.

njs12345on Reflecting on Haskell in 2017

The base language is actually very small - you do need to know a lot on top to get anything done but arguably that's true with most languages.

njs12345on Memory inside Linux containers (2014)

CPU also causes a similar problem - for instance Java (and lots of runtime Java libraries) use the number of available CPUs to decide how many threads to use for various tasks, which can cause terrible performance if you're giving a container 1 CPU of a 48 CPU server and it thinks all 48 are available - we encountered this at work recently and eventually bodged around it, but definitely a gotcha that this stuff isn't handled properly by runtimes yet.

njs12345on HM Prison – A Survival Guide (2015)

If you enjoyed this you might enjoy Jeffrey Archer's prison diaries - he was a British politician jailed for perjury in the 2000s who wrote up his time inside: https://www.amazon.co.uk/Prison-Diary-1-Hell/dp/0330418599

njs12345on Migrating from RethinkDB to Postgres – An Experience Report

If you wanted to, you could even use a trigger to compute that field, and then backfill it - no changes to app code required!

njs12345on Noam Chomsky Joins Faculty at University of Arizona

Ecuador didn't do too badly under Correa: http://cepr.net/images/stories/reports/ecuador-2017-02.pdf

njs12345on Language Server Protocol, Rust and Emacs

I imagine JSON serialisation overhead is pretty small when compared to parsing/typechecking a Rust program, which is probably what the Rust Language Server has to do whenever anything changes..

Not to mention that a lot of people capable of writing the tooling would struggle to export a C API. I write Scala in my day job and it would take me a while to learn how to do that - and I've done some programming in C/C++ before.

njs12345on We’ll Never Know Whether Monorepos Are Better

There are ways of doing this in a monorepo (by copying code to a new target for instance) - the difference is that you don't need to pay the price of versioning with every change.

njs12345on Visual explanation of the last Google Codejam 2017 question

Looks like you would be allowed to use it: https://code.google.com/codejam/terms

'You may use any programming language to solve a Code Jam problem. However, for any round after the qualification round, the compiler, interpreter, libraries, and external services you use must be available such that anyone else can use it for free without a time limitation and without violating any rights of any person or entity'

njs12345on Why predicted gridlock almost never happens

All of the places you listed have massive problems with NIMBYism. If the places a 30 minute cycle away from the City of London had the residential density of Hong Kong, what do you think house prices would be like?

njs12345on An Illustrated Book of Bad Arguments (2013)

You might like Jonathan Haidt's book 'The Righteous Mind' - http://righteousmind.com/

It has a lot on how people make ethical arguments in particular which I found quite eye opening (if a bit bleak in terms of its consequences for civic society).

njs12345on Monzo: All payments are failing temporarily

Is there anything really wrong with sharing a PIN for all your cards? What sort of attack does this make easier? Maybe if someone sees you entering a PIN for one of your cards and then steals your wallet?