VMware VAAI

vStorage APIs for Array Integration (VAAI) are APIs that improve system performance and scalability by using the storage system resources more effectively.

The ETERNUS DX supports the following features.

• Full Copy (XCOPY)

  Data copying processes can be performed in the ETERNUS DX without the use of a server such as when replicating or migrating the virtual machine. With Full Copy (XCOPY), the load on the servers is reduced and the system performance is improved.

• Block Zeroing

  When allocating storage areas to create new virtual machines, it is necessary to zero out these storage areas for the initialization process. This process was previously performed on the server side. By performing this process on the ETERNUS DX side instead, the load on the servers is reduced and the dynamic capacity allocation (provisioning) of the virtual machines is accelerated.

• Hardware Assisted Locking

  This control function enables the use of smaller blocks that are stored in the ETERNUS DX for exclusive control of specific storage areas.

  Compared to LUN (logical volume) level control that is implemented in "VMware vSphere", enabling access control in block units minimizes the storage areas that have limited access using exclusive control and improves the operational efficiency of virtual machines.