• raw: Raw format. When you create a raw image, specify a storage capacity. The raw image can occupy all capacities. However, this image does not support dynamic resizing and snapshots. Hence, its performance is great.
  • qcow2: Quick copy on write 2. At the beginning, a qcow2 image will only occupy a small portion of capacity, and supports dynamic resizing, compression, AES encryption, and snapshot. Hence, its performance is relatively great.