Help Center/ Data Warehouse Service/ FAQs/ Cluster Management/ What Are the Differences Between GaussDB(DWS) Cloud SSDs and Local SSDs?
Updated on 2025-06-12 GMT+08:00
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What Are the Differences Between GaussDB(DWS) Cloud SSDs and Local SSDs?

Cloud SSDs support scale-out. Therefore, you are advised to use them. The differences between cloud SSDs and local SSDs are as follows:

  • Cloud SSDs
    • Cloud SSDs use EVS as storage media and can be scaled out as data grows. This is more flexible.
    • Cloud SSDs are not bound to the ECS flavor. Therefore, you can adjust the flavors of cloud SSDs when needed.
  • Local SSDs
    • Local SSDs use ECS local disks as storage media. They have fixed capacity and higher performance but cannot be scaled out.
    • If the capacity is insufficient, you have to add more nodes to increase capacity. The flavors of local SSDs cannot be adjusted.
Parent topic: Cluster Management