A VMware administrator determines that a low priority virtual machine is negatively affecting the
disk I/O performance of a higher priority virtual machine. The virtual machines are hosted on the
same datastore presented to the same ESXi host.
Which configuration option should the VMware administrator use to resolve this issue?
A.
Increase the disk share value for the high priority VM.
B.
Migrate the low priority VM to another ESXi host.
C.
Create a Storage Profile for each priority level.
D.
Enable vSphere APIs for Array Integration (VAAI).
Explanation:
A is correct
If multiple virtual machines access the same VMFS datastore and the same logical unit number (LUN), use disk shares to prioritize the disk accesses from the virtual machines. Disk shares distinguish high-priority from low-priority virtual machines.
http://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.hostclient.doc%2FGUID-61F43364-AA74-4944-A996-F09C5BB59E0D.html&resultof=%22Use%22%20%22us%22%20%22Disk%22%20%22disk%22%20%22Shares%22%20%22share%22%20%22Prioritize%22%20%22priorit%22%20%22Virtual%22%20%22virtual%22%20%22Machines%22%20%22machin%22
仮想マシンの優先順位付けについて
http://pubs.vmware.com/vsphere-55/index.jsp?topic=%2Fcom.vmware.vsphere.hostclient.doc%2FGUID-61F43364-AA74-4944-A996-F09C5BB59E0D.html&resultof=%22Use%22%20%22us%22%20%22Disk%22%20%22disk%22%20%22Shares%22%20%22share%22%20%22Prioritize%22%20%22priorit%22%20%22Virtual%22%20%22virtual%22%20%22Machines%22%20%22machin%22
同じデータストアにいるのでvmotionしても影響かわらない。