Virtual Storage

The virtual storage infrastructure uses a client-server model to enable logical domains to access block-level storage that is not directly assigned to them. The model uses the following components:

• Virtual disk client (vdc), which exports a block device interface

• Virtual disk service (vds), which processes disk requests on behalf of the virtual disk client and submits them to the back-end storage that resides on the service domain

Although the virtual disks appear as regular disks on the client domain, most disk operations are forwarded to the virtual disk service and processed on the service domain.