# Cost-effective resources
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 OpenSearch Service offers a range of cost-effective resources that can help you optimize your search infrastructure costs. 


| AOSCOST03: How do you take advance of capacity reservation commitments to reduce costs? | 
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 For long-running applications with predictable usage, reserved instance offers significant discounts as compared to On-Demand Instances. If you have consistent usage for the next one to three years, Reserved Instances (RIs) can provide significant discounts. RIs are essentially a billing discount applied to On-Demand Instances within your account. 

**Topics**
+ [AOSCOST03-BP01 Evaluate forecasting for your workloads](aoscost03-bp01.md)