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VMware, Oracle redux: Virtualization Log

How “three times less overhead” became “three times better performance” is beyond me; but whatever the case, the issue of database performance in a VM is hot again, with VMware bloggers firing back at Oracle’s superiority claims. But with Oracle’s clout in the enterprise, analysts seem to think that IT shops will take a good, hard look at the latest Xen variant.

If you’re testing Xen, we have a new tip for you on hardware drivers in a paravirtualized Xen environment, and the vagaries of dom0, domU, QEMU and the like. And the takeaway is this: Hardware-driver issues become quite complicated on a platform that supports both paravirtualized and fully virtualized drivers.

Meanwhile, over at, we learn that VMware’s brand of paravirtualization — paravirt-ops and the Virtual Machine Interface (VMI) — is wowing early adopters. By running paravirtualized Ubuntu on VMware Workstation, blogger Mark Mayo witnessed impressive performance gains compared with running it with VMI disabled.

Also, for those of you following the Microsoft Viridian — ahem, Hyper-V — developments, SearchWinIT news director Margie Semilof uncovers some inconsistencies in Microsoft’s claim that Hyper-V will be a “standalone” and “bare metal” hypervisor. “The reason for all the guessing,” she wrote, “is that Microsoft has offered an architectural picture of Hyper-V that runs on Windows certified hardware and drivers. Since that’s the case, ‘something like Server Core or PE must be inside.'” she quotes Nelson Ruest, a Microsoft MVP and principal at Resolutions Enterprise, a consulting firm in Victoria, B.C., as saying.

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