An administrator notices that the database virtual machines fail to backup within the backup
window. Each database virtual machine has 4 vCPUs, 16GB RAM and 12 virtual disks. There are
16 database virtual machines to backup using 8 backup jobs.
Which is the simplest way to improve the backup performance for these virtual machines?
A.
Add a backup job for each virtual machine.
B.
Set a 16GB reservation for each virtual machine.
C.
Add 1MB VMDK drives at 1.0, 2.0 and 3.0 on the VDR appliance.
D.
Upgrade the array to 8GB FCP and ensure multipathing is configured properly.
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By adding a dummy disk of 1 MB to another SCSI bus adapter, the total available SCSI bus locations for hot-adding increases to 30, so all 8 virtual machines in the example given here can be backed up simultaneously using hot-add. Additional disks should be added in the sequence SCSI 1:0, SCSI 2:0, SCSI 3:0, and so on for as many or as few instances as are required. A virtual machine, such as the backup appliance may have up to 4 SCSI adapters, enabling a maximum of 60 available SCSI bus locations for hot-adding disks, which is sufficient for most environments.
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