How Much AWS RI and Savings Plans to Buy — A Strategy That Avoids 100% Commitment

Buying 100% coverage is not the right answer for RI and Savings Plans. Starting from hourly, non-rolling commitments, here is a practical strategy for committing only to your floor, incrementally.

A Design Blueprint for AWS Commitment Discounts in 2026 — Layering Strategy After Database Savings Plans

AWS cost optimization has one cardinal rule: shrink first, then commit. With Database Savings Plans (December 2025) at the center, this post lays out a three-layer stacking design (Compute SP for general compute, Reserved Instances for stable data tiers) through the lens of application order, provisioning math, and multi-account governance. The 2026 question is not how to chase the deepest discount, but how to design financial flexibility that never blocks modernization.

Reading Notes: 'Practical Startup Finance: Capital Policy Post-Mortem' by Yu Yamaoka

Reading notes on Yu Yamaoka's book — a useful reference for startup finance and IPO-related securities reports.

How to Transfer Billing Accounts Between Google Cloud Organizations

Moving a Google Cloud billing account across organizations directly, without parent-child orgs.

How to Send Google Cloud Billing Alerts to Slack

Sending Google Cloud budget alerts to Slack via Zapier, or Pub/Sub + Cloud Functions.

Reference Books and Articles for Understanding Software Accounting

Books and articles I used to understand software accounting from an engineering-leader perspective.