A fleet of Linux EC2 Spot Instances uses attached EBS volumes restored from snapshots and is frequently started and stopped. After restoring volumes from snapshots, the initial I/O throughput is lower than expected and the workload cannot get the nearly full provisioned IOPS it requires. What should a SysOps administrator do to ensure restored EBS volumes immediately deliver expected performance?

Enabling Fast Snapshot Restore (FSR) ensures that EBS volumes created from a snapshot can immediately deliver their full provisioned performance. Without FSR, data restored from a snapshot is loaded lazily in the background, leading to a "warming up" period where I/O throughput is lower. FSR pre-warms the snapshot data, making it instantly available. Restoring to unencrypted volumes and then encrypting them later does not address the lazy loading issue. Formatting as XFS or adjusting the read-ahead buffer are file system or OS-level optimizations that do not overcome the underlying lazy loading behavior of EBS volumes restored from snapshots without FSR.