How Meta Achieves 99.99999999% Cache Consistency

Community Picks is a section on daily.dev where our community members share the most interesting and valuable content they've discovered online. From insightful articles to handy tools, every post is a gem curated by our dedicated coomunity. To contribute to Community Picks, you need to have at least 250 reputation points, ensuring that only active and trusted members can share their finds.

Community Picks

Meta has developed a system to achieve 99.99999999% cache consistency, essential for scaling distributed systems. They use an observability solution featuring Polaris to monitor and detect cache inconsistencies and a tracing library to log data changes during race conditions. This approach allows querying the database at controlled intervals to prevent overload and find inconsistencies quickly. These techniques ensure only 1 out of 10 billion cache writes become inconsistent.

How Meta Achieves 99.99999999% Cache Consistency 🎯

<p>Meta’s actual blog post here:</p>
<p><a href="https://engineering.fb.com/2022/06/08/core-infra/cache-made-consistent/" target="_blank" rel="noopener nofollow">https://engineering.fb.com/2022/06/08/core-infra/cache-made-consistent/</a></p>
