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. Once a cluster is created, you cannot change its host classes.

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.

For segment hosts, the following disk types are available:

• local-ssd
• network-ssd-nonreplicated

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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