General recommendations for AFM gateway node configuration

To configure an AFM gateway node, the general recommendations are as follows:

The memory and CPU requirement for a gateway node depends on the number of assigned AFM, AFM-DR fileset, or AFM to cloud object storage fileset and files in the filesets.
Minimum 128 GB of memory is needed for the gateway node.
An AFM gateway node can be assigned up to 20 AFM, AFM-DR, or AFM to cloud object storage filesets.
A gateway node is a dedicated node in the cluster without any other designations such as NSD server, CES protocol nodes, quorum, and manager.

The following table contains the cluster level parameters:

Parameter	Value
Pagepool	8G
afmHardMemThreshold	40G
afmNumFlushThreads	8
afmDIO	2
maxFilestoCache	10000

To set these parameters, use the mmchconfig command. For example,

# mmchconfig pagepool=8G

For more information about configuration parameters, see Parameters for performance tuning and optimization.

All these recommendations are based on observations in a controlled test environment by running moderate or reasonable workload. The parameters values might vary based on the setup or workload.