Resource relationships in Yandex StoreDoc

The main entity Yandex StoreDoc operates is a database cluster.

Each cluster consists of one or multiple database hosts, which are virtual machines with deployed DBMS servers. Cluster hosts may reside in different availability zones and even different availability regions. You can learn more about Yandex Cloud geography in the Platform overview section.

In a cluster with two or more active hosts, one is automatically selected as the primary replica (master) to process write requests. If the master host fails, Yandex StoreDoc selects a new master from among the available hosts.

A cluster with two or more hosts located in different availability zones is tolerant of a single zone failure.

When creating a cluster, specify:

• Host class: VM template for deploying cluster hosts. For a list of available host classes and their specs, see Host classes.

• Environment: Environment where the cluster will be deployed:

  • PRODUCTION: For stable versions of your applications.
  • PRESTABLE: For testing purposes. The prestable environment is similar to the production environment and likewise covered by an SLA, but it is the first to get new features, improvements, and bug fixes. In the prestable environment, you can test new versions for compatibility with your application.

You can access a cluster created in a folder from any VM in the same cloud network. For more information about how the network works, see this Virtual Private Cloud guide.

Be mindful of what is managed by the service and what, by the Yandex Cloud customer. Understanding these zones of control makes you an efficient user of cloud resources and helps avoid potential database-related issues. For more information, see Zones of control between managed database (MDB) service users and Yandex Cloud.