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The RHEV series on VCritical wraps up for now, as the Red Hat marketing machine tones down the misleading rhetoric on their unproven virtualization product.
Red Hat claims that RHEV virtual disks are stored as common files. In reality, they are obfuscated beyond recognition thanks to LVM volumes.
Red Hat Enterprise Virtualization does not allow administrators to diversify storage technologies in a data center -- all hosts in a data center must choose between NFS, iSCSI, or Fibre Channel.
Red Hat Enterprise Virtualization tries to save power by consolidating VMs onto fewer hosts. Unlike VMware DPM, hosts remain powered on -- still consuming significant datacenter energy. Only vSphere safely powers off unneeded hosts during off-peak periods.
While VMware ESX exposes the latest performance-enhancing CPU instructions to virtual machines, Red Hat Enterprise Virtualization (RHEV) takes a more conservative approach -- downgrading all CPUs to masquerade as an old Pentium II.
Red Hat Enterprise Virtualization has an HA feature -- Red Hat advertises it as equivalent to VMware HA. Take a look at the numerous deficiencies in that product that will have you laughing all the way to the datacenter - HA [ha ha].
The Red Hat Enterprise Virtualization Manager is a single point of failure and the only management interface for RHEV Hypervisors. Oh, and it only runs on a physical Windows box.
Red Hat Enterprise Virtualization users may opt for a full installation of Red Hat Enterprise Linux as a hypervisor host. Besides adding extra cost, RHEL KVM packages and management tools are incompatible with RHEV and must be replaced.
Red Hat Enterprise Virtualization is a new competitor to VMware vSphere. After almost half a year on the market, is anyone using it?
Satirical open letter to Red Hat from VMware ESX.