Blog
Field notes and practical guides on AWS cost optimization.
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A Druid-compatible engine for CI that boots in well under a second
Replace the docker-compose of JVMs behind your Druid-facing integration tests with one Rust binary and one CI step: measured boot-to-first-SQL of ~10 ms and ~17 MB resident memory, with a copy-paste GitHub Actions job and the honest limits stated up front.
CI Apache Druid Testing Rust OLAP FerroDruid -
Rehearsing a migration off a legacy Apache Druid cluster — without touching the original
A verified end-to-end migration rehearsal off a legacy Apache Druid 27 cluster: attach the segments straight from S3 deep storage, flip on legacy null mode, point the same Superset at it — and check hyperUnique distinct-counts bit-for-bit against Druid's own answers, without touching the original.
Migration Apache Druid hyperUnique Legacy OLAP FerroDruid -
Migrating off Apache Druid without re-ingesting: reading S3 deep storage directly
Your Apache Druid data already sits in S3 as columnar segments. FerroDruid reads Druid's v9 segments directly from deep storage — verified locally and from real AWS S3 — so you can migrate without a re-ingestion project.
Apache Druid Migration Amazon S3 Deep Storage OLAP FerroDruid -
Swapping Apache Druid for FerroDruid under Apache Superset
Swap Apache Druid for FerroDruid under Apache Superset by changing one SQLAlchemy URI — a verified end-to-end walkthrough (Test Connection, dataset sync, charts, time-range filters, SQL Lab) plus an honest list of what does not work yet.
Apache Druid Apache Superset OLAP FerroDruid Druid alternative -
S4 NAT vs fck-nat: an honest comparison for replacing your NAT Gateway
fck-nat is excellent and free — for many teams it is the right answer. Here is a fact-based comparison of where it shines, where a commercial NAT instance earns its fee, and how to decide in five minutes.
AWS NAT Gateway Cost Optimization Networking fck-nat -
Is Your CloudWatch Bill Skyrocketing? A Practical Guide to Logs and Metrics Cost Optimization
Deconstructing CloudWatch Logs and Custom Metrics billing structures, presenting 5 ways to save on Logs and 4 ways to save on Metrics, plus an actionable 7-day plan.
AWS Cost Optimization CloudWatch Observability -
S3 Storage Cost Optimization in Practice: From Billing Breakdown to 7 Actionable Methods
Break down S3's four billing dimensions (storage, requests, data transfer, management) and provide 7 directly actionable cost-optimization methods: lifecycle rules, Intelligent-Tiering, Glacier, version cleanup, request optimization, VPC Endpoints, compression, and more.
AWS Cost Optimization S3 FinOps