Virtual Disk Development Kit 1.2 FAQ
Frequently Asked Questions
1. What is the Virtual Disk Development Kit (VDDK)
The VMware VDDK is an open API and SDK that help customers and ISV/IHV partners develop applications that create and access virtual disk storage. The VDDK enables partners (such as enterprise backup & recovery software vendors, anti-virus security vendors, and system management vendors) to extend their solutions to support virtualized IT environments and offer solutions for the virtualization market place.
3. Why did VMware release the Virtual Disk Development Kit?
Industry standards and open interfaces and APIs for virtualization increase the availability of complementary solutions, provide more choices to the customer, and increase interoperability of virtualized IT environments. This expands the virtualization market, which is good for VMware. The VDDK will help VMware grow the virtualization market by enabling a new ecosystem of partners to build applications that create or access virtual disks.
4. What are some of the use-cases for virtual disk development Kit?
The VDDK provides easy access to virtual disk storage, enabling a wide range of use-cases for application vendors including:
5. What is included in the Virtual Disk Development Kit?
The VDDK is a collection of C libraries and utilities, code samples, and documentation to help virtual disk storage. The kit includes:
6. What VMware products are supported by Virtual Disk Development Kit?
The VDDK supports virtual disk format for VMware vSphere 4 and VMware vSphere 4.1 (including ESX/ESXi), vCenter Server 4, VMware Virtual Infrastructure (ESX/ESXi 3 or 3.5 and VirtualCenter 2 or 2.5), VMware Server, VMware Workstation, VMware Player, and VMware Fusion products.
VDDK supports vCenter Server and VMware vSphere, including ESX/ESXi. The free ESXi version is not supported. When VDDK is embedded in a partner solution, VDDK licensing mandates the use of vSphere Foundation, Standard, or Enterprise products, not ESX/ESXi standalone.
7. What are the operating environment requirements?
Windows and Linux 32-bit and 64-bit versions are supported.
8. How does the Virtual Disk Development Kit benefit ISV/IHV partners?
ISV/IHV partners can leverage VDDK support to lower development costs, shorten time to market, enter new virtualization markets, and increase interoperability with virtualized IT environments. The VDDK enables ISV/IHV partners to develop complementary applications that work effectively across multiple virtual disks from a central location.
9. Is the Virtual Disk Development Kit redistributable?
Yes. To qualify for VDDK redistribution, you must be in the VMware TAP program at Select level or above and sign a redistribution agreement. Contact your VMware alliance manager to request the VDDK redistribution agreement. Please tell us how you plan to use the VDDK, in what products you plan to redistribute it, your company name, and contact information.
10. How does VDDK compare with vStorage APIs for Data Protection?
The vStorage APIs for Data Protection (VADP) is a backup framework that enables off-host, efficient, centralized backup and restore of vSphere virtual machines. The VDDK is focused on efficient access and transfer of data on virtual disk storage. It is one of the two key components of vStorage APIs for Data Protection. The VDDK can be used in conjunction with other key VADP component (vSphere SDK) as a framework to enable efficient backup and restore of vSphere virtual machines.
The VMware vSphere API is a Web Service and XML interface focused on management of virtual machines and ESX server configuration.
11. What are hosted disk and managed disk? Are both supported?
Hosted disk is virtual storage managed by a hosted product, such as Workstation, for a guest operating system. Managed disk is virtual storage managed by an ESX host or vCenter Server, contained within a VMFS volume. The VDDK supports both.
12. Does the Virtual Disk Development Kit support dynamic disks?
The Vix Mount API supports dynamic disk on Windows systems, although RAID 5 is not supported. However the vmware-mount program that is included in VDDK does not support dynamic disk on Windows systems.
The Vix Mount API does not support logical disk manager (LDM) on Linux systems.
Last updated 03 JUL 2010