Yandex Data Processing maintenance

Maintenance means:

• Changes to the host class and storage size.
• Other maintenance activities.

Maintenance is performed as follows:

1. Data storage and processing subcluster hosts undergo maintenance one by one. The subclusters and hosts are queued randomly. If a host needs to be restarted during maintenance, it becomes unavailable while being restarted.
2. The master host undergoes maintenance and gets its updates. If a cluster needs to be restarted during maintenance, it will become unavailable.