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• Building a Local Repository Inside an Air-Gapped Network — createrepo_c, repodata, .repo Files, and GPG Keys

  Covers the whole process of turning a transferred bundle of rpms into a working dnf repository inside an air-gapped network. It walks through the structure of the repodata directory that createrepoc produces and the role

  2026-08-14 · 10 min read #linux#rhel#air-gap#dnf#createrepo

• The Air-Gapped Operations Playbook — Keeping Up with Security Patches, Rolling Back, and Managing CVE Lag

  The story that begins after the transfer procedure is finished — the operations chapter, about running an air-gapped network for years. It first makes clear that slow CVE response inside an air-gapped network is not team

  2026-08-14 · 13 min read #linux#rhel#air-gap#dnf#security

• Bringing Container Images into an Air-Gapped Network — podman save and skopeo Are Different Tools

  Once the RPM transfer procedure has settled into place, the next request is almost always container images. It starts by separating podman save from the skopeo copy family — one goes through the local image store, the ot

  2026-08-14 · 12 min read #linux#rhel#air-gap#podman#skopeo

• Langfuse SDK Instrumentation — What Is Captured Automatically and What You Add by Hand

  Creating traces is not about installing an SDK, it is about drawing boundaries. Working from the Langfuse Python SDK v4, this post lays out what the decorator, the context manager, and manual observation creation each do

  2026-08-14 · 8 min read #observability#langfuse#llm-tracing#instrumentation#opentelemetry

• Why Langfuse Puts Traces in ClickHouse — How the Storage Layer Splits the Work

  The first surprise when you self-host Langfuse is that there is not one datastore but four. ClickHouse, Postgres, Redis, and object storage each take a different share. Working from the official documentation, this post

  2026-08-14 · 10 min read #observability#langfuse#clickhouse#architecture#postgres

• Air-Gap Transfer Procedure and Integrity — Building a Bundle That Still Installs the Same Way Six Months Later

  Covers what to put on the transfer medium, what to verify, and how to make that bundle produce the same result when you open it again six months later. It starts with why signature verification matters more in an air-gap

  2026-08-14 · 8 min read #linux#rhel#air-gap#rpm#gpg

• Downloading on the Outside for an Air-Gapped Transfer — dnf download, reposync, and yumdownloader Solve Different Problems

  A command-by-command walkthrough of the real procedure for pulling RHEL packages, dependencies and all, on an internet-connected machine so the result can be carried into an air-gapped network. It covers exactly what --r

  2026-08-14 · 10 min read #linux#rhel#air-gap#dnf#rpm

• The Claim That Understanding Is the Bottleneck, and Its Circularity — When the Explainer Is the Thing Under Review

  An essay on what remains when agents produce code faster than people can read it drew a long discussion. The author proposes moving the goal from understanding-to-verify to understanding-to-participate, and offers three

  2026-08-14 · 7 min read #engineering-culture#code-review#developer-experience#documentation#ai-assisted-development

• Following 657,607 Links, and the Lifespan of a URL — Why Links Die of Connection Failure, Not 404

  A study published its results after following, in 2026, every one of roughly 655,000 shortened links created between 2009 and 2014. More important than the headline number is the composition of the failures: most dead li

  2026-08-14 · 6 min read #web#data-engineering#archival#reliability#url-design

• Gemini 3.7 Flash, Its Introductory Price and Its Three-Week Cadence — Why Model Cost Is a Conditional Value, Not a Fixed One

  What a practitioner should take from the Gemini 3.7 Flash announcement is not the size of the benchmark gains but two other things: an introductory price that doubles on a named date, and the fact that the previous model

  2026-08-14 · 7 min read #llm#cost-optimization#benchmark#api-design#capacity-planning

• Cerebras Ultrafast and the Bottleneck in an Agent Loop — The Time 750 Tokens a Second Cannot Remove

  Cerebras and OpenAI announced an inference tier delivering up to 750 output tokens per second. The mechanism the announcement names is not compute but data movement, achieved by keeping weights in SRAM on the wafer. This

  2026-08-14 · 7 min read #llm#inference#hardware#latency#performance

• The Hybrid Attention in Qwen3.8-27B — Only 16 of 64 Layers Grow a KV Cache ♪ Listenable

  The reason a 27B model can carry a 262K-token context on a laptop is not its parameter count but its layer layout. Qwen3.8-27B places 48 of its 64 layers as linear attention (Gated DeltaNet) and only 16 as ordinary atten

  2026-08-14 · 8 min read #llm#inference#quantization#local-llm#attention

• The Technique of Hallucinating Instead of Classifying, and How to Validate It — Why a Fake Label Beats the Raw Query

  Instead of putting a taxonomy of hundreds of entries into a prompt, have a small model invent a plausible fake classification and map it onto the real taxonomy with embeddings. Why that can work is explained by asymmetry

  2026-08-14 · 7 min read #llm#embedding#classification#search#retrieval

• DRAM Address Scrambling and the Layer Beneath a Security Boundary — What Happens When the Fence Sits Above the Translation

  A research tool was published that reads the most hidden memory regions inside a CPU by perturbing address translation in the DRAM controller. The vulnerability is not in any cipher or permission check. It is in the layo

  2026-08-14 · 7 min read #security#hardware#memory#reverse-engineering#firmware

• The Block-Level Confidence Scores in Mistral OCR 4.1 — The Value That Decides Where People Go in a Document Pipeline

  Mistral released OCR 4.1 with paragraph-level bounding boxes, structural block labels, and block-level confidence scores. For anyone who has built a document pipeline, the third one is what matters, because confidence sc

  2026-08-14 · 6 min read #ocr#document-ai#data-pipeline#human-in-the-loop#cost-optimization

• The HEIR Homomorphic Encryption Compiler and the Condition Called Cost — When the Comments Supply the Number the Announcement Omits

  Google published HEIR, an open source compiler toolchain for homomorphic encryption. The real news here is the compiler, not the cryptography — what has kept homomorphic encryption out of deployment was never the mathema

  2026-08-14 · 7 min read #cryptography#privacy#compiler#machine-learning#security

• The Plugin Kernel Architecture of DeepSeek Harness — What Makes an Agent You Can Rewind

  Harness, the open source coding agent DeepSeek released, makes the model, the tools, and even the UI into plugins. But the interesting part is not the word plugin. It is two design decisions: representing every execution

  2026-08-14 · 7 min read #ai-agent#architecture#plugin-system#observability#open-source

• The Langfuse Tracing Data Model — How Trace, Observation, and Score Hold One Execution

  Looking at the Langfuse UI first tells you nothing about what you are looking at. This post starts from the shape of the data Langfuse collects. What a trace groups, what separates a span from a generation from an event,

  2026-08-14 · 8 min read #observability#langfuse#llm-tracing#data-modeling#opentelemetry

• After You Have Collected It — Langfuse Dashboards, the Metrics API, and Scores on Traces

  Collecting traces and getting answers out of them are different jobs. This post lays out which metric axes Langfuse offers and which dimensions you have to slice them by, then walks the Metrics API v2 query structure as

  2026-08-14 · 9 min read #observability#langfuse#llm-evaluation#metrics-api#dashboard

• Open Source Worth Watching Right Now (3) Infrastructure and Databases

  Databases and infrastructure are the field where license changes and forks redrew the board. From analytics engines and embedded databases to Postgres extensions, Kubernetes operators, and IaC, this post introduces 11 op

  2026-08-12 · 5 min read #open-source#database#infrastructure#postgresql#kubernetes