Direct LUN mapping
Like sharing disk, users can also attach direct LUNs to virtual machines in Red Hat Enterprise Virtualization, which allow for the same sharing as a normal disk image. The LUN from the SAN is connected to the hypervisor hosting the virtual machines via a host bus adapter of the host through which all the storage I/O takes place. A LUN is a number used to identify a logical unit related to computer storage. A logical unit is a device addressed by protocols and related to fiber channel, Small Computer System Interface (SCSI), Internet SCSI (iSCSI), and other comparable interfaces.
There are a few considerations that the end user has to keep in mind before using the direct LUN on virtual machines:
- Direct LUN from the storage must be presented to all the hosts in the data center for the live migration of the virtual machine attached with direct LUN to work.
- Exporting virtual machine direct LUN disk to RHEV export domain is not supported. Export of such virtual machines only...
