cartero Wednesday, August 12, 2026 · No. 25919
Parquet and columnar formats

querying cold parquet from s3/tape without a full restore

i build an agpl tiering engine called huskhoard that moves cold files to cheap storage like s3 or lto tape but leaves a file stub on your local nvme using fallocate. i just added native support for Parquet to the main branch. normally if a dataset is archived to cold storage you have to thaw or download the entire file just to run a simple query on one column. with huskhoard we use the linux fanotify api to catch the read request in userspace. We built a feature called streamgate that can int...

PostgreSQL

I built an offline-first sync engine for SQLite ↔ PostgreSQL using column-level CRDTs

Hi everyone, I’ve been working on a project called Loomabase, an offline-first synchronization engine written in Rust. The goal is to make it easier to build applications that continue working when devices go offline and automatically synchronize changes once connectivity is restored. Loomabase uses SQLite on clients and PostgreSQL on the server, with conflict resolution handled through column-level CRDTs and Lamport clocks. Instead of treating an entire row as a single unit, concurrent upd...

RAG

Shaping Product Understanding with Contrastive Reinforcement Learning

Etsy’s marketplace is defined by the creativity and craftsmanship of our sellers and the hundreds of millions of highly diverse products they offer. You can find silversmiths who cold-forge recycled sterling silver, weavers who dye raw fleece with indigo and black walnut, and ceramicists who throw stoneware on a kick wheel. These details define each product and often determine whether it matches a buyer’s taste, style, and interests. Sometimes buyers know exactly what they want, searching...

CVE and Exploit Development

SkillSpector

X / Twitter

x-risk-themed

MySQL

This week in infrastructure

Supabase announces v0.1 of a distributed Postgres project, Multigres. VillageSQL announces a REST layer for MySQL a la Supabase. MariaDB embeds DuckDB. Elixir is now gradually typed. PgDog gets funded. Native Linux containers for macOS reaches 1.0. And a new Cassandra client written in Rust.

Java

Recall is a structured operable agent memory MCP that compiles context packets One /recall and it just works no babysitting (local, SQLite, no cloud)

Agent memory is either the full chat log, a vector index, or an LLM summary you dump back into the prompt. If two facts disagree or a problem that's been solved already. It's not my favorite to fix something only to later have to remind Claude that the argument value or authorization has been updated, so 3 months later, this is what I got to share. It honestly has changed the way I work with AI. The MCP server is stdio, 42 tools, and auto-shuts down. Agents call recall_compile for whatever it...

Compilers

Designing CherryScript: Optimizing Data-Driven Workflows via Custom Python-Based Interpreters​​​​‌‍​‍​‍‌‍‌​‍‌‍‍‌‌‍‌‌‍‍‌‌‍‍​‍​‍​‍‍​‍​‍‌​‌‍​‌‌‍‍‌‍‍‌‌‌​‌‍‌​‍‍‌‍‍‌‌‍​‍​‍​‍​​‍​‍‌‍‍​‌​‍‌‍‌‌‌‍‌‍​‍​‍​‍‍​‍​‍‌‍‍​‌‌​‌‌​‌​​‌​​‍‍​‍​‍‌‍​‌‍‌‌​​‍‍‌​‌‌​‌‍​‌‌‍​‌‍‍‌‍‌‌‍‌‍‌‌‌​‍‌‍‌‍‌‍​‌‍‌‌​‍‍‌‍​‌‍​‍‌‍‍‌‌‍‍‌‌​‌‍‌‌‌‍‍‌‌​​‍‌‍‌‌‌‍‌​‌‍‍‌‌‌​​‍‌‍‌‌‍‌‍‌​‌‍‌‌​‌‌​​‌​‍‌‍‌‌‌​‌‍‌‌‌‍‍‌‌​‌‍​‌‌‌​‌‍‍‌‌‍‌‍‍​‍‌‍‍‌‌‍‌​​‌​‌‌‌‍​‌‌‍‌‍​​‍​‍​​‌‍​​​​​​‍‌​​‍​‌​​‍‌​‌​​‍‌​‌​‌‍‌‌​​‌​‌​​‍‌‌‍​‍​‌​​‍‌‌‍​‍​‍‌​‍​​‌‍‌‍‌​‌‍​‍​‌‍‌‍​‍​​​‌‌​​​​‌‌‍​‌‌‍​‌​‍‌‌​‌‍‌‌​​‌‍‌‌​‌‌‍​‍‌‍​‌‍‌‍‌‌‌​​‌‍‌​‌‌​​‍‌​​‌‍​‌‌‌​‌‍‍​​‌‌‌​‌‍‍‌‌‌​‌‍​‌‍‌‌​‌‍​‍‌‍​‌‌​‌‍‌‌‌‌‌‌‌​‍‌‍​​‌‌‍‍​‌‌​‌‌​‌​​‌​​‍‌‌​​‌​​‌​‍‌‌​​‍‌​‌‍​‍‌‌​​‍‌​‌‍‌‍​‌‍‌‌​​‍‍‌​‌‌​‌‍​‌‌‍​‌‍‍‌‍‌‌‍‌‍‌‌‌​‍‌‍‌‍‌‍​‌‍‌‌​‍‍‌‍​‌‍​‍‌‍‌‍‍‌‌‍‌​​‌​‌‌‌‍​‌‌‍‌‍​​‍​‍​​‌‍​​​​​​‍‌​​‍​‌​​‍‌​‌​​‍‌​‌​‌‍‌‌​​‌​‌​​‍‌‌‍​‍​‌​​‍‌‌‍​‍​‍‌​‍​​‌‍‌‍‌​‌‍​‍​‌‍‌‍​‍​​​‌‌​​​​‌‌‍​‌‌‍​‌​‍‌‍‌‌​‌‍‌‌​​‌‍‌‌​‌‌‍​‍‌‍​‌‍‌‍‌‌‌​​‌‍‌​‌‌​​‍‌‍‌​​‌‍​‌‌‌​‌‍‍​​‌‌‌​‌‍‍‌‌‌​‌‍​‌‍‌‌​‍‌‍‌​​‌‍‌‌‌​‍‌​‌​​‌‍‌‌‌‍​‌‌​‌‍‍‌‌‌‍‌‍‌‌​‌‌​​‌‌‌‌‍​‍‌‍​‌‍‍‌‌​‌‍‍​‌‍‌‌‌‍‌​​‍​‍‌‌

Google

Kagi Magic

Software Engineering

What's the facts, Charity? How do I get my leaders to stop running teams Into the ground?​​​​‌‍​‍​‍‌‍‌​‍‌‍‍‌‌‍‌‌‍‍‌‌‍‍​‍​‍​‍‍​‍​‍‌​‌‍​‌‌‍‍‌‍‍‌‌‌​‌‍‌​‍‍‌‍‍‌‌‍​‍​‍​‍​​‍​‍‌‍‍​‌​‍‌‍‌‌‌‍‌‍​‍​‍​‍‍​‍​‍‌‍‍​‌‌​‌‌​‌​​‌​​‍‍​‍​‍‌‍​‌‍‌‌​​‍‍‌​‌‌​‌‍​‌‌‍​‌‍‍‌‍‌‌‍‌‍‌‌‌​‍‌‍‌‍‌‍​‌‍‌‌​‍‍‌‍​‌‍​‍‌‍‍‌‌‍‍‌‌​‌‍‌‌‌‍‍‌‌​​‍‌‍‌‌‌‍‌​‌‍‍‌‌‌​​‍‌‍‌‌‍‌‍‌​‌‍‌‌​‌‌​​‌​‍‌‍‌‌‌​‌‍‌‌‌‍‍‌‌​‌‍​‌‌‌​‌‍‍‌‌‍‌‍‍​‍‌‍‍‌‌‍‌​​‌​​‍​​‌‍‌‌​​‌​‍‌​‌​​‍​‌‍‌‍​‍‌‌‍‌‍‌‍​‌‍​‌​​​​‍‌​‌​​‌​‌‍‌​​‍​​‍‌‌‍​‌‌‍​‌‍​​‌​‍‌​​​​​‌‍‌​​‌‌​​‍‌‍‌‌​‌‌‌‍‌‌​‌‌‌‍​‍​‌‌‌‍‌‌​‍‌‌​‌‍‌‌​​‌‍‌‌​‌‌‍​‍‌‍​‌‍‌‍‌‌‌​​‌‍‌​‌‌​​‍‌​​‌‍​‌‌‌​‌‍‍​​‌‌‌​‌‍‍‌‌‌​‌‍​‌‍‌‌​‌‍​‍‌‍​‌‌​‌‍‌‌‌‌‌‌‌​‍‌‍​​‌‌‍‍​‌‌​‌‌​‌​​‌​​‍‌‌​​‌​​‌​‍‌‌​​‍‌​‌‍​‍‌‌​​‍‌​‌‍‌‍​‌‍‌‌​​‍‍‌​‌‌​‌‍​‌‌‍​‌‍‍‌‍‌‌‍‌‍‌‌‌​‍‌‍‌‍‌‍​‌‍‌‌​‍‍‌‍​‌‍​‍‌‍‌‍‍‌‌‍‌​​‌​​‍​​‌‍‌‌​​‌​‍‌​‌​​‍​‌‍‌‍​‍‌‌‍‌‍‌‍​‌‍​‌​​​​‍‌​‌​​‌​‌‍‌​​‍​​‍‌‌‍​‌‌‍​‌‍​​‌​‍‌​​​​​‌‍‌​​‌‌​​‍‌‍‌‌​‌‌‌‍‌‌​‌‌‌‍​‍​‌‌‌‍‌‌​‍‌‍‌‌​‌‍‌‌​​‌‍‌‌​‌‌‍​‍‌‍​‌‍‌‍‌‌‌​​‌‍‌​‌‌​​‍‌‍‌​​‌‍​‌‌‌​‌‍‍​​‌‌‌​‌‍‍‌‌‌​‌‍​‌‍‌‌​‍‌‍‌​​‌‍‌‌‌​‍‌​‌​​‌‍‌‌‌‍​‌‌​‌‍‍‌‌‌‍‌‍‌‌​‌‌​​‌‌‌‌‍​‍‌‍​‌‍‍‌‌​‌‍‍​‌‍‌‌‌‍‌​​‍​‍‌‌

Capacity is one of the hardest problems because it sits at the knotty, gnarled-up intersection of so many other hard problems.​​​​‌‍​‍​‍‌‍‌​‍‌‍‍‌‌‍‌‌‍‍‌‌‍‍​‍​‍​‍‍​‍​‍‌​‌‍​‌‌‍‍‌‍‍‌‌‌​‌‍‌​‍‍‌‍‍‌‌‍​‍​‍​‍​​‍​‍‌‍‍​‌​‍‌‍‌‌‌‍‌‍​‍​‍​‍‍​‍​��...