I am preparing to install a SAN in our IT Infrastructure. We are currently using 3 x ESXi Hosts with local storage and we do have VMware version 6.0 Update 3 installed. We are licensed with VMware Essentials Plus (VMware vSphere 6 Essentials Plus Licensed for 2 physical CPUs (unlimited cores per CPU).
I am looking forward to begin using some of VMware's technical features that will only work with Shared storage, such as vMotion and High Availability. I have not worked with VMware and a SAN in several years and I have a few questions about if it will work the way I think it should.
: Since we do have a VMware Cluster already created, will I need to re-create the VMware cluster to use VMotion? Or will I simply need to configure the existing ESXi Host servers to enable vMotion? Just as the picture below shows?
: Since we have 3 different ESXi host servers, will VMotion even work? Do you need to have the same make and model servers to transfer the virtual servers?
- Dell PowerEdge T710 (Local Storage), 24 logical CPUs - Intel Xeon X5660 2.80 Ghz
- HP ProLiant DL380p Gen8 (Local Storage), 32 logical CPUs - Intel Xeon E5-26500 2.00 Ghz
- HP ProLiant DL380 Gen9 (Local Storage), 32 logical CPUs - Intel Xeon E5-260 v3 2.60 Ghz
: What if I would like to have specific Virtual Servers to only be used on the Dell Server, for performance requirements? But the other virtual servers can be on the HP ProLiant Servers. How can I make sure that those specific virtual servers only are connected to the Dell ESXi host?
: What will happen if 1 specific ESXi host becomes unresponsive, lets say the HP Gen8 Server and as a result of "High Availability" all of the virtual servers on the HP Gen8 Server is restarted to the other still available Host servers? Then lets say that the total resources assigned to every virtual server are more than what that ESXi host has (Logical processors and RAM). What will happen?
a. Will the ESXi host, that is overloaded, shutdown?
b. Will those virtual Servers perform poorly until everything is balanced out?
: How can I initiate the vMotion migration of 1 virtual server to a different ESXi host, from the Vsphere client? Will I need to right-click on the VM and select 'Migrate' and then follow the wizard?
: How can I initiate the vMotion migration of 1 virtual server to a different ESXi host, from the Vsphere web client? Will I need to select the virtual server and drag it over to the destination ESXi host?