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Yandex Managed Service for SQL Server™
  • Getting started
  • Step-by-step instructions
    • All instructions
    • Information about existing clusters
    • Creating clusters
    • Connecting to databases
    • Stopping and starting clusters
    • Changing cluster and database settings
    • Managing SQL Server hosts
    • Database management
    • Managing users
    • Assigning privileges and roles
    • Managing backups
    • Deleting clusters
  • Concepts
    • Relationship between service resources
    • Host classes
    • Network in Managed Service for SQL Server
    • Quotas and limits
    • Storage types
    • Backups
  • Access management
  • Pricing policy
  • API reference
    • Authentication in the API
    • gRPC
      • Overview
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      • ResourcePresetService
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      • OperationService
    • REST
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        • Overview
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  • Questions and answers
    • General questions
  1. Concepts
  2. Host classes

Host classes

  • Available 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 SQL Server 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:

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

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

    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 Cascade Lake
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
m2.7xlarge 56 100% 448
m2.8xlarge 64 100% 512
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
s2.6xlarge 64 100% 256
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