HLD Interview Notes: Day 8/30
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HLD Interview Notes: Day 8/30 Topic: Cache Consistency: TTL, Invalidation and Write Strategies Your cache makes applications faster. But how do you ensure users don't keep receiving outdated data? Three important concepts every system design interview candidate should understand. 1. Time-To-Live (TTL) Problem: Cached data can become outdated as the source data changes. How it works: Every cache entry gets an expiration time. Once the TTL expires, the entry becomes eligible for removal or refresh. The next request may fetch fresh data from the database. Example: A product listing is cach
Posted by SCR (8.4k followers) 2 days ago · 49 likes · 1.1k views · view the original post on X. Kept by the Dev Radar as Careers & learning.
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