“The Cloud” or “Cloud Computing” are some of the latest buzz words in the industry.  The definition of either of these terms is… well.. cloudy.  The basic idea is that your applications are virtualized across a global network of hypervisors.  Not too dis-similar from the VM Clusters run at the institution that I work at,…

I run a Xen vm system which in turn hosts all of my linux servers. Recently, I had reason to mount the disk image from one of the vm’s on the xen host. I’ve found little documentation on this, so I thought i’d post what I ended up doing. First, make sure the vm is…

We’ve started to look into memory ballooning on RHEL and KVM.  I thought I’d document some of my findings here. The concept is simple.  You have your RHEL host, running KVM, that host runs a number of virtual machine guests.  The guests can be anything that runs on the chip archetecture that you’re emulating.  In…