Understanding CloudWatch metrics on Amazon S3
In the introductory section of this chapter, we talked about storage devices. One of the storage devices mentioned was Amazon S3. We discussed that Amazon S3 is an object store that can store almost any number of files uploaded to it. Amazon S3 is exceptionally durable, with an SLA of 99.999999999%. This number, according to the uptime.is SLA calculator, means that there is zero downtime daily, weekly, monthly, quarterly, and even yearly. In this kind of service, you might not be monitoring for the availability of your files since AWS has promised that zero downtime will occur.
In S3, you might not find the fancy metrics and dashboard that are used to analyze and understand the performance of the system. Instead, S3 offers a more unique way of observing what needs to be monitored and measured. For every S3 bucket, there is a Metrics tab that shows just two graphs:
- Total bucket size
- Total number of objects
This is...