All Products
Search
Document Center

Cloud Parallel File Storage:Scale out a file system

Last Updated:Nov 24, 2025

The capacity that you configure when you create a CPFS for Lingjun file system is its initial capacity. If the file system becomes full, you cannot write new data. To prevent write failures from impacting your services, you can scale out the file system before it is full. This topic describes how to scale out a CPFS for Lingjun file system.

Prerequisites

You have created a file system. For more information, see Create a file system.

Precautions

  • The CPFS for Lingjun file system must be in the Running state. Scale-out is not supported for file systems in other states.

  • CPFS for Lingjun file systems support only scale-out, not scale-in. The scaling step size is 10,240 GiB. You can scale out the capacity to 1 PiB. You can create a file system with a maximum capacity of 20 PiB. To create a file system of this size, you can submit a ticket.

  • When file system usage is high, performance may degrade due to a high degree of file fragmentation. We recommend that you scale out the file system before its usage reaches 90%.

  • During a scale-out operation, CPFS may automatically balance data to optimize storage distribution. This balancing process consumes some disk and network bandwidth, which can cause a temporary and slight decrease in performance.

Scale out a CPFS for Lingjun file system

  1. Log on to the NAS console.

  2. In the left-side navigation pane, choose File System > File System List.

  3. In the top navigation bar, select a region.

  4. Find the target CPFS for Lingjun file system. In the Actions column, click the 3 icon and choose Upgrade.

    Note

    The file system supports only scale-out, not scale-in. The scaling step size is 10,240 GiB. You can scale out the capacity to 1 PiB. You can create a file system with a maximum capacity of 20 PiB. To create a file system of this size, you can submit a ticket.

  5. In the Upgrade panel, in the Capacity section, drag the slider to adjust the capacity.

  6. Click Buy Now, complete the purchase as prompted.

References