Sysadmin Tools 🇺🇦

Firnflow

The cost efficiency of S3 with the speed of local RAM. A multi-tenant vector and full-text search engine featuring a tiered RAM → NVMe → S3 architecture for microsecond latency on top of object storage

https://github.com/gordonmurray/firnflow

#rust #s3 #fulltextsearch

https://copy.fail

Most Linux LPEs need a race window or a kernel-specific offset.
Copy Fail is a straight-line logic flaw — it needs neither.
The same 732-byte Python script roots every Linux distribution shipped since 2017.

#linux #kernel #cve

PREEMPT_NONE Is Dead; Your Postgres Probably Doesn’t Care

A benchmark came out of AWS earlier this month showing PostgreSQL throughput on Linux 7.0 dropping to 0.51x what the same workload produced on Linux 6.x. The Phoronix headline wrote itself. Hacker News did what Hacker News does. By the end of the week, I had been asked by three separate clients whether they needed to hold their kernel upgrades.
They don’t. Almost nobody does. The regression is real, but it’s a narrow, loud artifact of a benchmark configuration that was already misconfigured for a 96-vCPU box with 100+ GB of shared memory. The headline undersells how much this is a “don’t do that” story and oversells how much this is a Linux-broke-Postgres story

https://thebuild.com/blog/2026/04/23/preempt_none-is-dead-your-postgres-probably-doesnt-care

#linux #postgres #benchmark

How will AI change operating systems? Part 1: Ubuntu and Linux

https://newsletter.pragmaticengineer.com/p/ubuntu-and-ai

#ubuntu #linux #ai

Lynxdb

A lightweight schema-on-read analytics in a single binary

https://github.com/lynxbase/lynxdb

#lgos #analitycs #logging #events

From Milliseconds to 26 Nanoseconds: How a $20 eBay SFP Module Beat My Entire NTP Setup

https://austinsnerdythings.com/2026/04/26/ptp-osa5401-26-nanoseconds-raspberry-pi

#raspberry #sfp #ntp #linux

outpost

Open Source Outbound Webhooks and Event Destinations Infrastructure

Production-ready infrastructure for sending webhooks and delivering events from your platform to your customers' systems. Self-host it anywhere, or use Hookdeck Outpost as a managed service.

https://github.com/hookdeck/outpost

#webhooks #aws #sqs #eventstream #pubsub

It's sudo, for Windows

https://github.com/microsoft/sudo

#microsoft #rust #mit #sudo #posix #linux #unix #windows

Optimizing Tail Sampling in OpenTelemetry with Retroactive Sampling

https://victoriametrics.com/blog/kubecon-eu-2026-sampling

#opentelemetry #tracing #victoriametrics #kubecon

SlateDB

SlateDB is an embedded storage engine built as a log-structured merge-tree. Unlike traditional LSM-tree storage engines, SlateDB writes data to object storage (S3, GCS, ABS, MinIO, Tigris, and so on). Leveraging object storage allows SlateDB to provide bottomless storage capacity, high durability, and easy replication. The trade-off is that object storage has a higher latency and higher API cost than local disk.

https://github.com/slatedb/slatedb

#rocksdb #database #storage #embedded #objectstorage #lsm

Building a high-volume metrics pipeline with OpenTelemetry and vmagent

https://medium.com/airbnb-engineering/building-a-high-volume-metrics-pipeline-with-opentelemetry-and-vmagent-c714d6910b45

#monitoring #observability #opentelemetry #victoriametrics #vmagent

Filesystems: Btrfs

https://internals-for-interns.com/posts/btrfs-filesystem

#fs #btrfs #linux #filesystem

Tune in to our next Virtual Meetup – Live April 16th at 5 pm GMT / 6 pm CEST / 9 am PT on our YouTube Channel

📔 Agenda:
🟣 VictoriaMetrics Roadmap Update
🚀 Anomaly Detection & Cloud
📌 VictoriaLogs Roadmap
🌍 Community News + AMA

Don’t miss the chance to learn, ask questions, and connect with the VictoriaMetrics community!

What Kubernetes Logs Won’t Tell You During an Incident


https://freedium-mirror.cfd/https://medium.com/activated-thinker/what-kubernetes-logs-wont-tell-you-during-an-incident-d2f427197c80

#logs #kubernetes #k8s #observability

Firn

Firn is a high-performance, multi-tenant vector and full-text search engine backed by object storage (S3 / MinIO / R2 / GCS). It is designed as a credible open-source alternative to turbopuffer, proving that a professional-grade tiered storage architecture (RAM → NVMe → S3) is achievable entirely from open-source components.
The cost efficiency of S3 with the speed of local RAM. A multi-tenant vector and full-text search engine backed by S3. Built with LanceDB and Foyer for microsecond-scale search latency on top of object storage.

https://github.com/gordonmurray/firnflow

#s3 #minio #search #backend

Ministack: the free LocalStack replacement

https://github.com/Nahuel990/ministack

#aws #docker #cloud #localstack

Announcing the RISE RISC-V Runners: free, native RISC-V CI on GitHub

https://riseproject.dev/2026/03/24/announcing-the-rise-risc-v-runners-free-native-risc-v-ci-on-github

#github #git #riscv

Basic Monitoring for AWS, Linux, NGINX, and PHP

https://rtfm.co.ua/en/victoriametrics-basic-monitoring-for-aws-linux-nginx-and-php

#monitoring #observability #aws #victoriametrics #nginx #php

18.8.6>18.8.7>18.10.1

it's time to update your GitLab🤠