I'm looking for a way to HOT back up (externally, via USB or LAN) my virtual machines while the machines are still active & running. I have number of challenges:
- Dealing with large variety of GUEST OS'es ranging from Windows 2000 - 2008 R2, Centos, SUSE, RedHat, Ubuntu, etc.
- Dealing with multiple physical host machines
- Dealing with large files (obviously) - in the 10's to 100's of GB's
- Machines need to stay active / running DURING BACKUP PROCESS.
Ideally this would be like RAID where data is made redundant, but one of the "drives" is external to the host machine. Maybe?
Each of the host machines currently has internal RAID, but that's not enough in the event that the entire machine gets wiped out because there's no external backup. Furthermore it becomes a problem because each host machine might have a different configuration - CPU / RAM, motherboard, etc.
After a great deal of research (although I'm still relatively fresh on the DFS / storage scene), it seems like I'm looking at creating some kind of clustering / distributed file system environment?
Any pointers would be very helpful.
Edit: I intentionally did not mention host or VM platform as I'm open to the right solution that will work for the needs described. I have experience with Linux and Windows, multiple VM platforms. Don't really care about cost at the moment. Trying to understand what solutions are available.