Full Copy; Block Zeroing - NEC M310 Configuration Manual

5. Functions <VAAI Support (2)>
n Full Copy
1. Copy Virtual Machine (VAAI disabled)
VM1
Mail
LINUX Windows
VMware ESX
VM2
VM2 data
Web
VM2.vmdk
Windows
n Block Zeroing
Block zeroing is used in various scenarios. (For example, fill free disk space with zeros in order
to make virtual disk file optimal size.
1. VAAI Disabled
VM1 VM2
Mail Web
LINUX Windows
VMware ESX
Server writes zeros
VM1
VM2 data
VM1 data
Web
Web
VM1.vmdk VM2.vmdk
Windows
Windows
VM2 VM3
Web Web
Windows
Server performs the copy
by reading and writing data
to the storage.
Server resources are used
to perform the copy.
VM3
Copy of
Web
VM data
cpVM2.vmdk
Windows
VM3
Web
Windows
VM3
VM2
VM3 data
Web
VM3.vmdk
Windows
2. Copy Virtual Machine (VAAI enabled)
Mail
LINUX
VM1
Mail
LINUX
VMware ESX
Server offloads the block zeroing to the
storage.
VM1
VM1 data
Web
VM1.vmdk
Windows
Storage fills zeros in the area.
NEC Confidential
VM1 VM2 VM3
Web Web
Windows Windows
Vmware ESX
Server offloads the copy to the
storage. Copy is done within the
storage, which frees up resources
on the server.
VM2
Copy of
VM data
VM data
Web
VM2.vmdk
cpVM2.vmdk
Windows
Windows
2. VAAI Enabled
VM2 VM3
Web Web
Windows Windows
VM3
VM2
VM2 data VM3 data
Web
Web
VM2.vmdk VM3.vmdk
Windows
Windows
VM3
Web
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