Sep 15, 2026 · Backend Development

Thread Pool Tuning for 10M SMS/Hour: From Golden Formula to Backpressure

This article dissects a real interview challenge: designing a thread pool to send 10 million SMS messages in one hour. It explains why Executors is dangerous, how to calculate initial thread counts using the golden formula for I/O-bound tasks, why dynamic tuning with monitoring matters, and how CallerRunsPolicy provides natural backpressure in batch scenarios. It also covers reliability patterns like persistence, acknowledgments, and compensation tasks to prevent data loss on crashes.

BackpressureCallerRunsPolicyThread Pool

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Thread Pool Tuning for 10M SMS/Hour: From Golden Formula to Backpressure

Big Data Technology Architecture

Feb 11, 2020 · Databases

JDHBase Multi‑Active Architecture and Asynchronous Replication Practices

This article describes JDHBase’s large‑scale KV storage architecture, its HBase‑based asynchronous replication mechanism, multi‑active cluster design, client‑side routing via Fox Manager, automatic failover strategies, dynamic replication tuning, and serial replication techniques to ensure data consistency across geographically distributed data centers.

HBase ReplicationJDHBaseMulti-Active

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JDHBase Multi‑Active Architecture and Asynchronous Replication Practices