max_on_demand_count

Description

The max_on_demand_count parameter sets the maximum number of on-demand nodes when using the mixed node capacity type. This allows you to control the upper limit of on-demand instances in your cluster.

Default Value

The default value for max_on_demand_count is 100.

Use Cases

• Cost Management: Limit the number of on-demand instances to control costs while still benefiting from the reliability of on-demand nodes.
• Resource Allocation: Ensure that a specific maximum number of on-demand nodes are available for your cluster to meet performance and reliability requirements.

Setting Parameters

To set the max_on_demand_count parameter, use the following command:

$ convox rack params set max_on_demand_count=50 -r rackName
Setting parameters... OK

This command sets the maximum number of on-demand nodes to 50.

Additional Information

The max_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 max_on_demand_count helps you optimize your resource allocation by ensuring that you have a sufficient number of on-demand nodes for reliability while utilizing spot instances to reduce costs.

Additionally, consider configuring the min_on_demand_count parameter to ensure that a minimum number of on-demand nodes are always available to handle your workloads.

By configuring the max_on_demand_count parameter, you can effectively manage the scalability and cost-efficiency of your Convox rack.