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Testing out components for ~12V battery with a BMS for a portable speaker build, 🙂

The biggest memory hog on my server is ElasticSearch for Mastodon. I'm toying with an idea of a minimal REST-API-compatible replacement based on SQLite and FTS5 - basically expose/translate enough of the ES API for Mastodon/Chewy to be happy and dump raw JSON to FTS5 index. Preliminary results for my instance (ES->minisrch): RAM 1GB->130MB, on-disk 47MB->13MB.

Audacity 3.0.0 has been released audacityteam.org/audacity-3-0- and they changed the storage format from "pile of files" to a single database file, storing all the audio data. Nice! Great example of "SQLite as application file format" sqlite.org/appfileformat.html

Some experience. I got notification that my instance is reaching end-of-support. Went to the Docker directory, `$ docker-compose build && docker-compose up`. Oopsie, I just jumped two versions (18->20, skipped 19) since I use 'stable' tag haven't done this in some time. Can't roll forward, since jumping 2+ versions is unsupported. Can't roll back, since it's unsupported. WTF? Resolved this by deleting version.php and re-running v18 and continuing from there. Fortunately no data loss.

One small observation: I was storing a lot of large blobs (kilobytes) in DB, I thought the default 4K page size would lead to a lot of overhead. So I set the page size to 64k. Oh was I wrong:

> PRAGMA page_size=4096;
> VACUUM INTO "/tmp/c4k.db";
> PRAGMA page_size=65536;
> VACUUM INTO "/tmp/c64k.db";

$ ls -lh /tmp/c*db
- 4k: 124MiB
- 64k: 148MiB

I guess larger page size also leads to larger fragmentation.

Michal boosted

・ *゚
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use #linux
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。*・。

Michal boosted

Year progress: ▒▒▒▒░░░░░░░░░░░░░░░░ 20.0%

Michal boosted

position: -0.5487479134150096 + 0.6234537756761203i
pixel width: 1.1470597022370747e-06

Actually owning your hardware is nice. I just fixed fan noise on my by disassembling and cleaning up the fan assembly and dropping a bit of machine oil into the "axle" of the fan. No more noise at low RPM. That thing did not even originally have thermal paste on the "integrated" gpu die!

What a nice way of explaining the motivation and process of coming up with a new library that surpasses the one provided with : tailscale.com/blog/netaddr-new

It's been more than a year that I'm thinking of building a new computer. But given the current situation, I decided to do a bit of maintenance on my 6y old computer instead (clean up, replace thermal paste). After all, the trusty Skylake i5 6600K is more than capable for everything I throw at it, it has been running stable all this time overclocked 3.5->4.3GHz, and it's 14nm like most current Intel chips 😁

Today I finally got to updating my oldie VPS from Debian Jessie -> Stretch -> Buster. It was pretty smooth (while ! there yet; do change /etc/apt/sources.list; apt update; apt upgrade; apt dist-upgrade; done). I should be set until 2024 😄 the only hickup was with the firewall and Buster migrating to iptables-nft. After lots of attempts I gave up, searched the internets and a quick update-alternatives to iptables-legacy it's working again.

Michal boosted

@FreeCAD Hello, any recommended tutorials/guides for those with minimal/no prior experience? I tried to model a "portable speaker box" to dimensions, but after 30 min I gave up ("I just need a simple box and carve some round holes, it can't be that hard!"). I got lost in the UI since I did not know any of the keywords/modes/procedures.

Michal boosted

ffplay -i /dev/video0 -vf "crop=iw/2:ih:0:0,split[left][tmp];[tmp]hflip[right];[left][right] hstack" # Hook your laptop up to your TV and use ffmpeg's ffplay to make a 2-sided real-time kaleidoscope cam keeps kids occupied for hours.

Meanwhile I'm spending second day reinstalling a relative's Windows laptop. The eternal update + restart cycle is not done yet.

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The time finally came - I upgraded my Arch install. Other than the fact that Postgres got upgraded to a new version and I followed the quick and well written guide on Arch wiki to resolve that in a few min, no hickups. Still feels like magic that a rolling distro can feel so stable.

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