Leveraging Trash Folder Access to Handle Deletions

VAST CSI Driver gains a substantial performance boost during volume deletions through the use of Trash Folder Access, a feature of VAST Cluster.

Note

VAST Cluster 4.7.0-SP6 or later is required for the VAST drivers to be able to use the Trash Folder Access feature.

When deleting a volume that resides on VAST Cluster 4.7.0-SP6 and later where the Trash Folder Access feature is enabled, the delete request is processed using the VAST REST API's /folders/delete_folder/ endpoint. This means that the processing takes place locally on the VAST cluster.

VAST CSI Driver can delete either through Trash Folder Access, or by using a backward-compatibility mode which requires you to dedicate a virtual IP pool and a view policy for deletions through the deletionVipPool and deletionViewPolicy parameters in the VAST CSI Driver Helm chart configuration file.

When deleting volumes that reside on a VAST Cluster version earlier than 4.7.0-SP6, or when Trash Folder Access is disabled for any reason, you still need to specify deletionVipPool and deletionViewPolicy.

Note

For deletions to succeed, the tenant in the deletion view policy (deletionViewPolicy) must match the tenant of the view policy (viewPolicy) specified for the storage class.