Know why it is important for you to deploy two machines per Cloud service (workload)?

Know why it is important for you to deploy two machines per Cloud service (workload)?

If you are facing this error:

The process C:\Windows\system32\vmicsvc.exe (“Computer Name”) has initiated the shutdown of computer “Computer Name” on behalf of user NT AUTHORITY\SYSTEM for the following reason: Other (Planned)

Reason Code: 0x80000000

Shutdown Type: shutdown

Comment: 

http://blogs.msdn.com/b/windows_azure_technical_support_wats_team/archive/2013/09/24/windows-azure-virtual-machine-restarted-or-shutdown-with-out-any-notification.aspx