virtualbox.org

Thanks Martin

I've switched to KVM, and no stability issues at all even when under heavy load (some expected performance issues given the load), with the same provisioning. It was the guests which were not stable the host was perfect. Looks like its good bye for Virtualbox for me.

It's your hardware that defines the limitations of the capability to run multiple VMs effectively, rather than the virtualisation software. If you have a four core processor and 8Gb RAM that is one limitation, it you have an 8 core processor and 64Gb RAM that is a different limitation; and VirtualB...

Only available RAM limits you directly when having multiple active VMs "at the same time". You just need to take into consideration that virtualization is essentially a time-sharing implementation for the usage of CPU and I/O activity. Virtualbox just switches very fast between runnning t...

It looks to me like virtual box has limitations as virtualisation was designed to run large numbers of VMs on single servers, not limit them to one per core. Any vm host which crashes when more CPU are allocated then physically available , instead of time slicing is not worth using, and this may be ...

Before I start digging too much I have a quick question about over provisioning I have 8 vms (during a migration) on a single host with 4 cores (8 threads) and 16 GB of ram on the physical host. Recently some or all the vm have been aborting with no clear errors in the logs, except VMMDev: vmmDevHea...

Found the issue, I had not done the step of having the usb device unplugged, then plugging it back in after the boot and the driver installing. Got anoth er issue now. I had the device working well, and I could reboot the guest and everything still worked including the mounts of the USB3 disk. Howev...

sorry putting the files on the host is not an option as I'm looking at some point to migrate this disk to a physical host, so need to be in ext4 or ntfs format.
So a conversation would be good, what am I missing as I think I have covered all the steps required ?

Running the latest version of Virtual box 5 on Windows 7 Ultimate 64 bit, with Ubuntu 14.04 guests which work fine. I’m looking to mount an 8TB USB3 disk on the guest. I’ve installed the latest extensions pack on the host, and set up the filter for the device. However even after rebooting the host a...

Got a little further, The reason is the arp broadcasts don't appear to be working , if pinging the client works then the arp table is updated at both ends, or if the entries are added to the arp tables manually on ubuntu server then it also works ok. Any idea why the arp cache (which i have cleared ...

Running virtual box 4.3.26 on win 7 with an ubuntu 14.04 server running in headless mode. Sometimes i cant not reach the unbutu server from other clients on my network on any protocol (but not seen the issues from other networks (internet)). However if i manage to connect to the ubuntu server and pi...