Enabling Kernel Samepage Merging (KSM)
by Sven Vermeulen, post on Thu 09 May 2013When using virtualization extensively, you will pretty soon hit the limits of your system (at least, the resources on it). When the virtualization is used primarily for testing (such as in my case), the limit is memory. So it makes sense to seek memory optimization strategies on such systems. The …
Qemu-KVM monitor tips and tricks
by Sven Vermeulen, post on Tue 30 April 2013When running KVM guests, the Qemu/KVM
monitor is a nice interface
to interact with the VM and do specific maintenance tasks on. If you run
the KVM guests with VNC, then you can get to this monitor through
Ctrl-Alt-2 (and Ctrl-Alt-1 to get back to the VM display). I …
Comparing performance with sysbench: cpu and fileio
by Sven Vermeulen, post on Thu 18 April 2013Being busy with virtualization and additional security measures, I frequently come in contact with people asking me what the performance impact is. Now, you won't find the performance impact of SELinux here as I have no guests nor hosts that run without SELinux. But I did want to find out …
Uploading selinuxnode test VM
by Sven Vermeulen, post on Mon 25 February 2013At the time of writing (but I'll delay the publication of this post a few hours), I'm uploading a new SELinux-enabled KVM guest image. This is not an update on the previous image though (it's a reinstalled system - after all, I use VMs for testing, so it makes sense to …