Standalone instances of ApsaraDB for MongoDB are developed for scenarios with high fault tolerance and apply to the storage of non-core data. This architecture is highly cost-effective and is ideal for environment testing, learning and training, and internal enterprise business.
It enables you to purchase ApsaraDB for MongoDB at a lower entry-level price to enjoy superiority in O&M support and kernel-level optimization. The standalone architecture can adapt ApsaraDB for MongoDB to various scenarios to help enterprises minimize their costs and expenses.
Does the architecture of standalone instances provide high availability?
The architecture of standalone instances has only one replica, which cannot provide high availability. A failure can cause service unavailability for more than 30 minutes in extreme cases. We recommend that you use the architecture of the replica set in production environments.