Discuss Systems
discuss.systems · Group blog · on HN since 2023
Discuss Systems is a Mastodon server for systems researchers and engineers, hosting posts on Unix history, databases, and datacenters.
What HN saysHN links it for individual posts, notably the thread on the recovered Unix v4 tape and posts by database researcher Andy Pavlo.
20HN people shared it
9linked it in comments
17stories submitted
2.0Kstory points
4 months agolast shared
2023people per year2026
Most-shared posts
- 1Bell Labs 'Unix' Tape from 1974 Dumped to a Tarball3 people · 31 points · first shared 2025 · 2 comments on HN
- 2Unix v4 Tape Found2 people · 510 points · first shared 2025 · 100 comments on HN
- 3Audiophile forum debating which versions of memcpy had the highest sound quality (2013)2 people · 99 points · first shared 2023 · 64 comments on HN
- 4How decentralized is the Fediverse, really? [Mastodon post]2 people · 15 points · first shared 2025 · discussion on HN
- 5Unix v4 Tape2 people · 8 points · first shared 2025 · 2 comments on HN
- 6Super sorry to the guy with the username reset on GitHub2 people · 3 points · first shared 2023 · 1 comments on HN
- 7A quick tour of some of the datacenters in the Salt Lake Valley2 people · 2 points · first shared 2026 · discussion on HN
- 8These are real, actual slides from a SoftBank presentation2 people · 1 points · first shared 2026 · discussion on HN
- 9The Alexa feature "do not send voice recordings" you enabled no longer available1 people · 957 points · first shared 2025 · 666 comments on HN
- 10Everyone at NSF overseeing the Platforms for Wireless Experimentation is gone1 people · 404 points · first shared 2025 · 549 comments on HN
- 11Let's talk about SSH and security (brute force logins)1 people · 1 points · first shared 2024 · discussion on HN
- 12A History of Teapots and Unix1 people · 1 points · first shared 2026 · discussion on HN
- 13CS Conference Climate and Harassment Survey1 people · 1 points · first shared 2023 · discussion on HN
- 14@andy pavlo1 people · first shared 2023
- 15@andy pavlo 1138392085435262041 people · first shared 2025
What HN people wrote when they linked it
mdaniel · 2023-08-29
They have a "Contact Us" as well as https://github.com/cmu-db/dbdb.io/issues so it's possible someone submitted it. Also, this project is apparently run by Andy Pavlo who is a fascinating follow on Twitter (or https://discuss.systems/@andy_pavlo) for all things database
pocksuppet · 2026-04-08
https://discuss.systems/@palvaro/116286268110078647
Arguing with Gemini Home Assistant about whether or not it can turn off the lights. When the user gets frustrated and tells the LLM to kill itself, the LLM turns off the lights.
qingcharles · 2025-12-24
The tape being read for the first time:
https://discuss.systems/@ricci/115747843169814700
Tape running on PDP11 emu:
https://oldbytes.space/@flexion/115752573933914452
ChrisArchitect · 2025-12-23
Ongoing posts about the tape discovery and work: https://discuss.systems/@ricci/115748594116050292
laxd · 2025-11-08
The OG thread: https://discuss.systems/@ricci/115504720054699983
PuercoPop · 2025-05-22
Recently saw this through https://discuss.systems/@pkhuong/114532017716618023 which summaries why this would be useful:
> Flagging old live (i.e., potentially immortal) allocations is easier (https://github.com/backtrace-labs/poireau) and more closely matches the goal of identifying why the heap grows instead of entering a steady state.
Ej. Why is Sidekiq memory consumption growing over time.
jstrieb · 2024-01-29
Are you thinking of @reset?
https://discuss.systems/@adrian/110783401400871208
https://news.ycombinator.com/item?id=36888444
JdeBP · 2026-06-29
One of Masayoshi Son's recent slideshows has been doing the rounds on the FediVerse this week. If you've seen people making odd comments about 'Goose was not valued.' or 'Goose value 71.' or 'eggs do not lay eggs' over the past few days then Son's 2026 presentation to shareholders is what they are going on about.
* https://discuss.systems/@dev/116807460725864716
This is the context that a lot of us didn't have. Son has been doing this since 2010, the goose laying golden eggs going back to at least 2014, and the 2020 earnings report having a run of 23 slides of geese and eggs. Other weird things over the years have included dog telepathy and a representation of COVID-19 as flying unicorns jumping out of a ditch. As the Bloomberg people pointed out, this significantly came to the attention of the world outwith Japan, which largely boggled at some of the slideshows sans context, in 2019 and 2020. Part of the world is discovering this afresh in 2026.
* https://vice.com/en/article/these-delusional-powerpoint-slides-show-ho…
* https://trillium.substack.com/p/golden-geese-stirring-the-pot-shop
* https://group.softbank/system/files/pdf/ir/presentations/2020/earnings…
* https://group.softbank/media/Project/sbg/sbg/pdf/ir/presentations/2011… (https://group.softbank/en/news/webcast/20100625_01_en)
Some of the criticism over the years has focussed not on the more oddball aspects of…
matt_d · 2025-01-17
Schedule (with readings & lectures): https://15799.courses.cs.cmu.edu/spring2025/schedule.html
Lectures YouTube Playlist: https://www.youtube.com/playlist?list=PLSE8ODhjZXjYCZfIbmEWH7f6MnYqyPw…
Announcement: https://discuss.systems/@andy_pavlo/113839208543526204
"New @CMUDB Course: Database Query Optimization
This is a special topics course on how to build a SQL optimizer from scratch covering foundational and state-of-the-art implementations. All lectures available on Youtube: https://15799.courses.cs.cmu.edu/spring2025/
One topic we will discuss is the Cascades optimizer architecture. There has never been a good description of how to implement it but the Microsoft Research Database Group just published a book that describes SQL Server's implementation. Microsoft has made the entire book available for free: https://www.microsoft.com/en-us/research/publication/extensible-query-…
Query optimization is the hardest topic in databases and this is the first time I am offering this course. I am going to make mistakes and say incorrect things in my lectures. Send corrections to [email protected]"