Today is the new semester for @CMUDB's Intro to Database Systems! We're going harder into material than ever before. Projects are more challenging but you can use LLMs to help. We also have 10min talks each Wed from leading DB companies. Follow from home/prison on YouTube: https://15445.courses.cs.cmu.edu/fall2025

Everything is available for free to non-CMU students:
• Lectures on YouTube: https://www.youtube.com/playlist?list=PLSE8ODhjZXjYMAgsGH-GtY5rJYZ6zjsd5
• Slides + Notes + Homeworks on course website.
• Project source code on GitHub: https://github.com/cmu-db/bustub
• Grading with Gradescope (see FAQ ➡️ https://15445.courses.cs.cmu.edu/fall2025/faq.html#q7)

Special thank you to our Affiliate companies for their support this academic year:
• ClickHouse
• DataStax
• dbt Labs
• Firebolt
• MotherDuck
• RelationalAI
• SingleStore
• SpiralDB
• PingCAP / TiDB
• Yellowbrick
• Yugabyte

With Framework Laptop 12 shipping, we've also published mechanical CAD of the Mainboard to our GitHub repo to enable re-use.

https://github.com/FrameworkComputer/Framework-Laptop-12/blob/main/Mainboard/2D/Framework_Laptop_12_MB_Generic.pdf

Moment of Gratitude: CloudFlare

CloudFlare saved the Internet Archive servers from DDOS attack yesterday

The max rate of this DDOS attack was 525 Gbps (44.93 Mpps) of a "TCP flood."

The Internet Archive does not have enough bandwidth to fend off that kind of attack.

Thank you #cloudflare or we would have had a very bad Saturday at the @internetarchive

DDOS attacks are coming more frequently.

[$] Parallelizing filesystem writeback

Writeback for filesystems is the process of flushing the "dirty" (written) data in the page cache to storage. At the 2025 Linux Storage, Filesystem, Memory Management, and BPF Sum [...]

https://lwn.net/Articles/1024402/ #LWN