May 2, 2026 · Engineering
File Storage: From Local Disk to Object Storage
Attachment features start simple, until clients upload multi-gigabyte videos and ask for per-file permissions.
1 min readRead article →
An enterprise blog · Lanzhou · since 2019
The Jiayifangyuan Journal
What we learn, written down in public
Engineering
24 postsApril 20, 2026 · Engineering
Observability: Logs, Metrics and Traces
When something breaks, answering 'what happened' is worth more than 'the system is slow'.
1 min readRead article →
April 8, 2026 · Engineering
Rate Limiting: Protect the System Before Optimising Experience
Rate limits are not there to block users, but to keep most of the system available under abnormal traffic.
1 min readRead article →
March 27, 2026 · Engineering
Cross-Service Consistency: Compensation Beats Distributed Transactions
Distributed transactions sound complete, but real projects rely more on compensable business flows.
1 min readRead article →
March 15, 2026 · Engineering
Mini Program Performance: Trade-offs for a One-Second First Screen
Mini programs have bundle limits and platform startup costs, so first-screen work is about trade-offs, not tricks.
1 min readRead article →
March 3, 2026 · Engineering
Logging Standards: Still Readable Three Months Later
Logs are written for future colleagues and for yourself at three in the morning. Structure is the baseline.
1 min readRead article →
— The editors at JiayifangyuanEST. 2019 · JYFY