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This article presents PDMan, a lightweight open‑source database modeling tool that simplifies schema design, supports automatic code generation for MySQL, Oracle and Java, offers version management, and provides step‑by‑step instructions for installation and usage to boost development efficiency.
DeWu chose the open‑source time‑series database TDengine to store billions of daily Sentinel flow‑control metrics, using a super‑table design with per‑resource tables, a three‑node cluster, Druid/MyBatis pooling, and raw‑SQL writes, achieving 10 ms batch write latency, sub‑millisecond queries, and 90 % compression.
The article reflects on the parallels between urban planning and software design, critiques the pitfalls of unplanned legacy systems, outlines a typical three‑layer development workflow, and introduces domain‑driven design concepts as a disciplined approach to building maintainable backend architectures.