A production EC2 instance uses an EBS volume that has reached 100% utilization, causing the application on the instance to fail. Which action will restore application functionality in the SHORTEST possible time?
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Correct answer: Increase the size of the existing EBS volume. Log in to the EC2 instance and run the operating system file-system commands to expand the file system to use the added space..
Why this is the answer
Increasing the size of an existing EBS volume and then extending the file system from within the OS is the fastest way to resolve a full disk issue. This operation can often be performed without detaching the volume or stopping the instance, minimizing downtime. Creating a snapshot and a new volume, or provisioning a new volume and copying data, both involve significant data transfer time and potential application downtime while data is moved. Stopping the instance to change its type to one with more local disk is incorrect because the issue is with the attached EBS volume, not the instance's ephemeral storage, and it also incurs downtime.
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