Recommendations needed on RDM vs VMDK
Posted on 2014-04-25
I currently have an document imaging system software on a Windows 2003 physical server. I have a 2TB and a 500GB SAN lun attached to this server. I will upgrade the imaging system to the latest version running 64bit. I am planning to install the new version on a VM. I do not have the option to do a P2V so I will start from scratch. Currently my weekend full backups on this server takes forever due to the fact that it is a lot of data and the data consist of mostly small tiff files.
Now with vSphere 5.5 I was thinking about creating a 3TB VMFS where I can have all the data and use Veeam to backup everything. However, I am not sure if this is the best route. Veeam and even VMware recommend the use of VMFS whenever possible but I was hopping to get some "this is what I would do if I were you" from the experts.
Also, if I go the VMFS/VMDK route, what is the best way to move the data from the lun to the VMDK? Backup/Restore? Copying it over the network? The data resides on a VNX 5300.
This is not related to the original question, but Veeam is pretty popular so I'm hoping someone might know the answer. I know Veeam backs up the vmdk files so in theory if I go the VMFS/VMDK route, my backup should be faster as I will be backing up a single big file instead of millions of small tiff files. Does it work the same way with Veeam if I use RDMs on virtual mode? Does it still backup a single big file?