Third availability zone now available in CROC Cloud
Cloud resources can now be created and deployed in three availability zones.
This major update increases the reliability of services and distributed apps deployed in CROC Cloud. Distributing resource across three zones also helps to reduce the load on intact resources if a zone becomes unavailable.
The third availability zone (AZ) simplifies the implementation of high-availability solutions requiring a quorum, leader election or voting. Especially, an odd number of AZs solves the split-brain problem in a failover cluster. The placement of nodes on three autonomous sites helps to keep the cluster up and running, even if one site fails.
You can deploy the same cloud resources (virtual machines, volumes, subnets, etc.) in the new AZ as in the other zones. To do this, when creating resources, select the availability zone ru-msk-vol52 or a pre-created subnet in this availability zone. The distribution of cloud resources across several availability zones minimizes the negative effect caused by the incidents in one of them.
The ru-msk-vol52 zone is hosted within Volochayevskaya-2 Data Center certified by Uptime Institute for Tier III design compliance. It is fully autonomous and independent of the other two zones thanks to separate power supply, cooling, computing resources and network. The zone is connected to the other AZs via independent links with less than 1 ms latency.