Introduction To Vmware Terminology; Vmware Infrastructure Environment - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

co-location of units and then splitting of units, or by using physical tape to transfer data from remote
office to seed unit in data centre. This process only has to be done once.
Other information: WAN link sizing and data centre D2D sizing is critical. Size for existing link or
new link using the HP StorageWorks Backup Sizer.

Introduction to VMWare Terminology

Figure 22 VMWare Infrastructure Environment
.
The above diagram shows the different components that make up a virtualized server environment
and its connections to external primary storage and data protection devices.
ESX acts as a hardware extraction layer on one side providing virtual resources to the VM machines
whilst on the other side interfacing to the physical hardware.
In this next set of solutions we will talk about possible methods of providing data protection to this
virtualized environment:
• Base Support – Agents inside Virtual Machines
• Virtual Machine snapshots – ESX Console
• Virtual Machine snapshots – VCB
• Zero Downtime Backup and Instant Recovery
Each technique has its pros and cons as listed below. It is important to point out that "snapshot"
backups (sometimes called image or point-in-time backups) cannot always provide single file restore
capability (for example with Linux the whole image has to be restored). In addition, snapshots are
not best suited to complex online backups of applications such as Oracle, SQL, and Exchange because
they do not quiesce the application in the appropriate way before taking the snapshot. Snapshots
are best suited to being aligned with a VMWare machine OS where the whole environment can be
captured in a single image.
HP StorageWorks VLS and D2D Solutions Guide 65