Spot instances are cloud computing resources that are available at a lower price than the regular on-demand price, but can be interrupted and reclaimed by the cloud provider at any time1. Spot instances are ideal for batch jobs that have flexible completion times and can tolerate failures, as they can provide faster and cheaper computing power than regular instances2. Spot instances can also be combined with other pricing options, such as on-demand or reserved instances, to optimize the performance and cost of batch jobs3.
Implementing right-sizing is a technique of adjusting the size and type of cloud resources to match the actual needs and usage patterns of an application4. Right-sizing can help reduce the cost and improve the efficiency of cloud resources, but it does not necessarily make the batch job faster, as it depends on the workload and demand of the job.
Increasing CPU usage is a measure of how much processing power is being consumed by an application or a system. Increasing CPU usage can make the batch job faster, but it can also increase the cost and risk of overloading the system. Increasing CPU usage is not a solution by itself, but rather a consequence of using more or larger cloud resources.
Adding storage is a process of increasing the amount or capacity of data that can be stored in the cloud. Adding storage can help store more data or backup data for the batch job, but it does not directly affect the speed or cost of the batch job, as it depends on the type and performance of the storage service. References: CompTIA Cloud Essentials+ CLO-002 Study Guide, Chapter 5: Cloud Resource Management, pages 191-192.
