The High Availability Architecture Guide compares CockroachDB and Oracle in providing highly available distributed services, emphasizing the trade-off between data correctness and high availability. Oracle, a traditional database designed before the cloud era, requires multiple complex and costly technologies for high availability, often resulting in data anomalies. CockroachDB, however, as a cloud-native database, offers built-in features for always-on availability, strong data consistency, and distributed performance without additional licensing costs. The guide highlights that while Oracle necessitates separate tools and licenses for each high availability feature, CockroachDB includes these capabilities within its database binary, with options for enterprise-grade tools for more complex needs. This comparison aims to clarify the complexity Oracle introduces and suggests that CockroachDB provides a more straightforward, cost-effective solution for high availability architecture.