krallin

(engineer working on Buck2 here)

Buck2 is actually used internally with Git repositories, so using Sapling / hg is definitely not a requirement

I love SQLite (and use it in a large number of places in our application stack!), but I feel that it suffers from a case of bad defaults. To name a few:

- Foreign key checking (and cascading deletion for that matter) are turned off by default. You need to enable them using `PRAGMA foreign_keys = ON;`.

- There are practically no downsides (and a number of upsides) to using the WAL journalling mode (at least for "use a local database and store it on the disk" use cases). The main one being that reads will conflict with writes if you don't enable it! (which is a problem in a multi-threaded environment) Unfortunately, that's another feature you must remember to enable: `PRAGMA journal_mode = WAL;` (for obvious reasons, this one "stays enabled" after you turn it on).

- Full auto-vacuum cannot be enabled after you start writing to the database unless you enabled incremental auto-vacuum. If you're unsure, it's a good idea to enable incremental auto-vacuum to keep that option open. But, here again, that's not the default: you need `PRAGMA auto_vacuum = INCREMENTAL`.

This tends to be explicitly problematic if you have to perform one or more ad-hoc queries using the SQLite command line on an app's database, and forget to apply the relevant PRAGMAs! I wish there was a way to add "default" PRAGMAs on a sqlite database file to avoid this.

(note: some of these defaults are configurable when compiling sqlite from scratch, but if you're dynamically linking with an OS-provided instance of the library, you can't really do that).

AWS provides you with a number of DNS records for each NLB:

- One record per zone (which maps to the EIP for that zone) - A top-level record that includes all active zones (these are all zones you have registered targets in, IIRC)

The latter record is health checked, so if an AZ goes down, it'll stop advertising it automatically (there will be latency of course, so you'll have some clients connecting to a dead IP, but if we're talking unplanned AZ failure, that's sort of expected).

That said, this does mean you probably shouldn't advertise the IPs directly if you can avoid it, yes.

(disclaimer: we evaluated NLB during their beta, so some of this information might be slightly outdated / inaccurate)

Author here - let me know if you have any questions!

(whether that's about using Supercronic... or making regular cron work in containers)

Yes, you're entirely correct; that's actually what I meant by "provided the Kernel can represent [it]" (albeit perhaps not very clearly!).

Cheers,

Unfortunately it looks like the distros have not been particularly diligent about releasing a fix via the security channel (according to the article), so this PPA is a workaround

This principle doesn't necessarily mean functions should never return booleans, though.

Booleans are used in a variety of (popular) Python libraries when checking whether a password is correct (e.g. Django's `check_password` returns False if the password is wrong).

Quick disclaimer: I'm the author of Tini (thanks for the hat tip, by the way!).

Note that for interactive usage, Tini actually hands over the tty (if there is one) to the child, so in that case signals that come "from the TTY" (though in a Docker environment this is an over-simplication) actually bypass Tini and are sent to the child directly. This should include SIGSTP, though I'm not sure I tested this specifically.

That being said, both tools are probably indeed very similar — after all there is little flexibility in that kind of tool! Process group behavior is probably indeed where they differ the most. : )

While not as common as nounset and errexit, pipefail is a useful option as well (set -o pipefail).

Using pipefail, if any program in a pipeline fails (i.e. exit code != 0), then the exit code for the pipeline will be != 0.

E.g. pipefail can be useful to ensure `curl does-not-exist-aaaaaaa.com | wc -c` doesn't exit with exit code 0..!

Ha, interesting trick! : )

The GitHub API allows up to 5,000 requests per hour. I currently poll once an hour, so there's a bit of headway. If that becomes a problem, I think I can always space out checks for less-active repositories (there's also the option of allowing users to authenticate with GitHub and use their own quota so they don't have to share it with anyone else).

Cheers

Ha, this is a great idea! I've added this now :). Just reload.