Step-by-Step Explanation:
Understand the Problem:
An I/O intensive application on an Amazon EC2 general purpose instance is experiencing performance issues.
Users report delays or failures during intensive read/write operations.
The VolumeQueueLength metric is consistently high during these periods.
Analyze the Requirements:
Address the high VolumeQueueLength, which indicates that the EBS volume is unable to handle the I/O requests efficiently.
Improve the disk I/O performance to restore full application performance.
Evaluate the Options:
Option A: Modify the instance type to be storage optimized.
Storage optimized instances are designed for workloads that require high, sequential read and write access to large data sets on local storage.
This could help, but if the issue is primarily with EBS volume performance, increasing IOPS would be a more direct solution.
Option B: Modify the volume properties by deselecting Auto-Enable Volume I/O.
Auto-Enable Volume I/O is a setting that automatically enables I/O for the EBS volume after an event such as a snapshot restore.
Deselecting this option will not address the issue of high I/O demand.
Option C: Modify the volume properties to increase the IOPS.
Increasing the IOPS (Input/Output Operations Per Second) will directly address the high VolumeQueueLength by allowing the volume to handle more I/O operations concurrently.
This is the most effective and direct solution to improve the performance of I/O intensive tasks.
Option D: Modify the instance to enable enhanced networking.
Enhanced networking provides higher bandwidth, higher packet per second (PPS) performance, and consistently lower inter-instance latencies.
While beneficial for network performance, this does not directly impact the EBS volume’s I/O performance.
Select the Best Solution:
Option C: Modifying the volume properties to increase the IOPS directly addresses the high VolumeQueueLength and improves the EBS volume's ability to handle intensive read/write operations.
Amazon EBS Volume Types
Amazon EBS Volume Performance
Optimizing EBS Performance
Increasing the IOPS of the EBS volume ensures that the application can handle the required intensive read/write operations more efficiently, directly addressing the high VolumeQueueLength and restoring full performance.
