Observed arrival · 2026-09-07
Mainframe: a tiny consensus library
Mainframe helps engineers build replicated services and databases around an ordered, durable shared log.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
Field notes
Mainframe places a shared ordered history beneath either an application service or a database engine. The examples show an application retaining a JSON-RPC API and local map or SSD index, while database builders supply their own query, index, and transaction rules. Reads can remain in-process, but writes coordinate through the log and latest-data reads may need to catch up. The page identifies S3 backends as prototypes and describes the implementation as inspired by Meta’s Delos research.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue