min_on_demand_count

Description

The min_on_demand_count parameter sets the minimum number of on-demand nodes when using the mixed node capacity type. This allows you to ensure a baseline of on-demand instances in your cluster.

Default Value

The default value for min_on_demand_count is 1.

Use Cases

• Reliability: Ensure that a minimum number of reliable on-demand instances are always available to handle workloads.
• Performance Assurance: Maintain a specific number of on-demand nodes to meet performance and reliability requirements.

Setting Parameters

To set the min_on_demand_count parameter, use the following command:

$ convox rack params set min_on_demand_count=2 -r rackName
Setting parameters... OK

This command sets the minimum number of on-demand nodes to 2.

Additional Information

The min_on_demand_count parameter is used in conjunction with the node_capacity_type parameter. When the node_capacity_type is set to mixed, you can specify the minimum and maximum number of on-demand nodes to balance cost and availability.

Adjusting the min_on_demand_count helps you ensure that there are always a sufficient number of reliable on-demand nodes available for your workloads, complementing the use of spot instances to reduce costs.

Additionally, consider configuring the max_on_demand_count parameter to limit the maximum number of on-demand nodes and optimize resource allocation.

By configuring the min_on_demand_count parameter, you can effectively manage the reliability and performance of your Convox rack.