Host classes

The host class determines the computing power allocated for each host in the cluster. When you change the host class for a cluster, all existing hosts change to match it.

The available storage doesn't depend on the host class. For storage limitations, see the section Quotas and limits.

Available host classes

Hosts in Managed Service for MongoDB clusters are deployed on Yandex Compute Cloud VMs. You can create these VMs on any of the platforms that Compute Cloud supports. For a detailed description of the platforms, see Platforms.

The full list of possible host configurations on each platform is provided below.

Configuration types:

  • s1, s2: Standard configurations, with 1:4 vCPU to RAM GB ratio.

  • m1, m2: Configurations with an increased vCPU to GB RAM ratio (1:8 vs. 1:4 for standard classes). These configurations can be useful for clusters with increased cache requirements.

  • b1, b2: Configurations with a guaranteed vCPU share under 100%. This class of hosts is intended for test load, with the minimum recommended host configuration for production solutions being 2 vCPUs with a guaranteed share of 50%.

    Note

    Hosts with a guaranteed vCPU share under 100% can't be used in multi-host clusters.

Host class name Number of CPUs CPU performance RAM, GB
Intel Broadwell
b1.nano 2 5% 2
b1.micro 2 20% 2
b1.medium 2 50% 4
s1.nano 1 100% 4
s1.micro 2 100% 8
s1.small 4 100% 16
s1.medium 8 100% 32
s1.large 16 100% 64
s1.xlarge 32 100% 128
Intel Cascade Lake
b2.nano 2 5% 2
b2.micro 2 20% 2
b2.medium 2 50% 4
m2.micro 2 100% 16
m2.small 4 100% 32
m2.medium 6 100% 48
m2.large 8 100% 64
m2.xlarge 12 100% 96
m2.2xlarge 16 100% 128
m2.3xlarge 24 100% 192
m2.4xlarge 32 100% 256
m2.5xlarge 40 100% 320
m2.6xlarge 48 100% 384
s2.micro 2 100% 8
s2.small 4 100% 16
s2.medium 8 100% 32
s2.large 12 100% 48
s2.xlarge 16 100% 64
s2.2xlarge 24 100% 96
s2.3xlarge 32 100% 128
s2.4xlarge 40 100% 160
s2.5xlarge 48 100% 192