Greenplum® host classes

The host class determines the computing power allocated for each host in a cluster. In a Managed Service for Greenplum® cluster, the classes of master hosts and segment hosts may differ. For information on how to select host classes, see Calculating the cluster configuration.

For master hosts, the host class determines which disk types are available:

• s2, i2: local-ssd, network-ssd-nonreplicated.
• s3, i3: network-ssd, network-hdd, local-ssd, network-ssd-nonreplicated, network-ssd-io-m3.

For segment hosts, the following disk types are available:

• local-ssd
• network-ssd-nonreplicated
• network-ssd-io-m3

The available storage size does not depend on the host class. For storage limitations, see Quotas and limits.

Available host classesAvailable host classes

Managed Service for Greenplum® cluster hosts are deployed on Yandex Compute Cloud virtual machines on Intel Cascade Lake and Intel Ice Lake platforms with a guaranteed vCPU share of 100%. The full list of possible host configurations is provided below.

Configuration types:

• s2, s3: Standard configurations, with 4:1 GB RAM to vCPU ratio.
• i2, i3: Configurations with an increased GB RAM to vCPU ratio (8:1). These configurations can be useful for clusters with higher cache requirements. Hosts with this configuration run in a software-accelerated network, and their use significantly affects cluster pricing.

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