retrofitting LUKS encryption on installed system

[Junk]

On Sat, 2013-06-29 at 23:51 +0200, Reindl Harald wrote:
> 
> Am 29.06.2013 23:38, schrieb Bill Davidsen:
> > Reindl Harald wrote:
> >> "model name: QEMU Virtual CPU version 1.0.1"
> >> what the hell - on VMware you have the same CPU as the host and only "VMware EVC"
> >> is filtering CPU capabilities to provide relieable hot-migration between hosts
> >> by make only the flags of the oldest CPU in the cluster visible to guests
> > That's why we use KVM, migrations may not be within a cluster. Or be real time "migrations" as you are thinking of
> > it, but rather may involve being backed up until the next time there is a support need for the machine. Different
> > environment, different goals
> 
> the goal of virtualization in production is live-migartion and failover
> this way you hve zero downtime at host-upgrades / reboots
> 
> >> that's why a VMwar eguest has around 95-98 % of the native performance because
> >> there is only few binary translation and most instrcutions are passed 1:1
> >>
> > And as I remember if there was one old machine in the cluster you wouldn't have the aes instruction either. 
> > That's from docs, haven't tried VMware in a very long time
> 
> that is why i mentioned "VMware EVC"
> 
> you hardly need this because any running process inside a virtual machine will crash if
> it is using CPU instructions which are not available on the CPU of the target host after
> a migartion and with "VMware DRS" the cluster automatically starts live-migartions
> if one host is overloaded while others are idle to spread the load of the guests
> in a useful manner to the available hosts
> 
> virtualization is the base of my daily job and afer working some time
> with this features you never ever setup a server on bare metal for
> gain a few percent more peformance with no safety net or way too complex
> HA setups inside the machines itself inseatd have them a layer deeper
> than your production OS
> 
> well, i love opensource and on the guests Fedora/CentOS is running but
> until now there is no opensource solution which can beat VMware on
> certified hardware with proper support
> 
> 

Ovirt does this for free, as does the Redhat Product RHEV
https://gb.redhat.com/products/cloud-computing/virtualization/  Live
migration with HA is part of the base package. You don't need to buy an
extra subscription. 

Junk.