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. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
