From the perspective of cost saving, can the oceanbase database cluster only deploy two nodes? There is only one master server and one slave server like mysql.

At the same time，it also can ensures zero RPO and RTO of less than 30 seconds.

CodePudding user response：

Deploying a cluster with only two nodes may not be the most cost-effective solution and may not provide enough redundancy and resiliency to handle potential failures.
OceanBase may offer low RPO and RTO but running a cluster with only two nodes may increase the risk of data loss and longer downtime in the event of a failure.

Solution:

To ensure a more cost-effective and reliable solution, it is recommended to have at least three nodes in an OceanBase cluster for better fault tolerance.