AWS EBS Cost reduction

• IOPS is a number of I/O operation per second, which means the amount of read or write operations that could be done in one seconds time.
• Depending on the operating system and the application/service that needs disk access it will issue a request to read or write a certain amount of data at the same time. This is called the IO size and could be for example 4 KB, 8 KB, 32 KB and so on.
• There is a relation between the IO size and the IOPS, as in if the IO size is small we could get higher amounts of IOPS and reach a certain amounts of throughput (MB/s). So, the throughput is calculated using, Throughput = Number of IOPS * IOSIZE Above steps can be reviewed to reduce the cost.

For the root cause you should analyse the patterns of access

1 )Look at the CloudTrail for API events

2)Analyzing your costs with AWS Cost Explorer https://docs.aws.amazon.com/cost-management/latest/userguide/ce-what-is.html

3)Analyze your billing dashboard for the charges

4)How are charges for Amazon EBS volumes calculated on my bill? https://aws.amazon.com/premiumsupport/knowledge-center/ebs-volume-charges/

5)https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-volume-types.html

Hello,

For the root cause you should analyse the patterns of access and what type / size of data is being read in the disk. So, keep in mind that the size of an I/O operation determines the throughput the EBS volume provides. Amazon EBS calculates throughput using the equation: Throughput = Number of IOPS * size per I/O operation.

More information in this guide.