Active Expiration

IT Services Circle

Apr 16, 2022 · Databases

Understanding Redis Expiration Strategies: Lazy Deletion, Periodic Deletion, and New EXPIRE Options

This article explains Redis's two expiration strategies—periodic active deletion and lazy deletion—detailing how the EXPIRE command works, the new NX/XX/GT/LT options introduced in version 7.0, the impact of unsynchronized clocks, and the underlying implementation code.