Knowledge Center

Overview

You can view the overall status and usage of your volume group at PetaSpace > Overview.

Overall Status

Volume group is a collection of multiple volumes. All data in the volume group will be file-based and allocated to different volumes. The overall status of the volume group is shown at the top:

  • Ready to Configure: You must configure a volume group to create shared folders in PetaSpace.
  • Healthy: The overall condition of your volume group is good.
  • Adding volumes: Volumes are being added to the volume group.
  • Removing volumes: Volumes are being removed from the volume group.
  • Read-only: Some volumes in the volume group are read-only. Please fix the issue as soon as possible.
  • Crashed: You cannot access the volumes in the volume group. Please fix the issue as soon as possible.

Note:

  • When the status of the volume group is read-only or crashed, shared folders in PetaSpace will be unavailable.

To create a volume group:

Click Create and select the volumes to be combined into the volume group to provide storage for data. You can still create normal shared folders on these volumes.

To add volumes to the volume group:

Click Manage > Add volumes to select volumes to expand storage capacity. Please note that you can only add volumes to the volume group when its status is Healthy.

To remove volumes from the volume group:

Click Manage > Remove volumes to remove volumes from the volume group.

Note:

  • This process may take a long time and may fail due to insufficient volume space. If the operation fails, the volume will be remain the same, and no data will be lost.
  • If the volume is healthy, the data on the volume will be automatically moved to another volume to avoid data loss.
  • If the volume is not healthy, the system will remove the volume directly.
  • If you remove all the volumes, the shared folders on the volume group will also be deleted.

Limitations:

  • The maximum number of volumes per volume group is 10.
  • The minimum capacity required per volume is 100 GB.
  • Only volumes in ext4 and Btrfs file system are supported.
  • All data in the shared folders will be file-based, and every file will be distributed to a single volume instead of divided to multiple volumes. Therefore, if the size of a file is larger than the available space of any volumes, the system will fail to write the file to the volume group even when the total available capacity of the volume group is sufficient.
  • If quota has been assigned to ext4 volumes, files distributed to the ext4 volumes in the volume group will not be limited by the quota settings; however, the file size will still be added to the volume quota, and the usage of the shared folders will be affected. It is recommended you disable quota settings for ext4 volumes in the volume group.
  • After adding/removing volumes in PetaSapce or deleting volumes from Storage Manager, the service will be restarted and thus the shared folders in PetaSpace will be temporarily unavailable.