I have just configured a XenServer 6.2.0 (based on CentOS) host in a server with 2 high-end processors, 256 GB RAM and SSD storage. The distribution is up to date.
We set up several virtual machines and every expected functionality is working properly but I have concers about the speed of the network communication among VMs inside the host (for example, transferring one file using scp from one VM to another).
These are the numbers I got:
- Ping response time: 0.5 ms
- Transfer rate (big files): 50 MB/s
I have no previous experience with virtualization technologies, so I don't know if this numbers make sense. Do they make sense? Is usually internal network that slow?
I try several changes with no effect on speed:
- Installing or deinstalling xen-tools
- Using a single-server private network
- Disabling ethernet offload
Any light on this would be appreciated. Thanks, Jose