https://blog.vnykmshr.com/writing/tags/caching/Recent content in Caching on vnykmshrHugoenThu, 20 Jun 2024 00:00:00 +0000https://blog.vnykmshr.com/writing/redis-caching-patterns/Thu, 20 Jun 2024 00:00:00 +0000https://blog.vnykmshr.com/writing/redis-caching-patterns/<p>Put Redis in front of a database and reads get fast. The cost is a cache layer that&rsquo;s now load-bearing, and a set of failure modes that come with that.</p> <p>Three write patterns, three hard problems. The patterns determine consistency. The problems determine whether your cache layer is a net positive or a source of outages.</p> <h2 id="write-patterns">Write patterns</h2> <p><strong>Cache-aside</strong> (lazy loading). The application checks cache on read. On miss, it reads from the database and populates cache. Writes go directly to the database; cache entries are either invalidated or left to expire.</p>