A user has configured CloudWatch monitoring on an EBS backed EC2 instance. If the user has not attached any additional device, which of the below mentioned metrics will always show a 0 value?
Suggested Answer:A🗳️
CloudWatch is used to monitor AWS as the well custom services. For EC2 when the user is monitoring the EC2 instances, it will capture the 7 Instance level and 3 system check parameters for the EC2 instance. Since this is an EBS backed instance, it will not have ephemeral storage attached to it. Out of the 7 EC2 metrics, the 4 metrics DiskReadOps, DiskWriteOps, DiskReadBytes and DiskWriteBytes are disk related data and available only when there is ephemeral storage attached to an instance. For an EBS backed instance without any additional device, this data will be 0.
A
EBS backed instance will not have ephemeral storage attached to it.
We can capture 7 Instance level and 3 system check parameters for the EC2 instance, out of the 7 EC2 metrics, the following 4 metrics are disk related metrics and only available when there is an ephemeral storage attached to the instance.
1. DiskReadOps
2. DiskWriteOps
3. DiskReadBytes
4. DiskWriteBytes
Here he EBS backed instance does not have any additional device, this data will be 0.
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