Monday, April 19, 2010

KVM Disk Performance with different configurations


Summary:
  • Using a block device as vda and apply the virtio_blk driver is the fastest
  • There is still a 5-10% penalty on both read and write.
Test Setup:

KVM: 8GB memory, 8 VCPU
Native: 8GB memory, 8CPU

Test command:

bonnie++ -s 24576 -x 10 -n 512

4 comments:

  1. Hi,

    did you perform those tests on a fully virtualized or on a para-virtualized KVM domU/guest?

    Greetings and many thanks for your benchmarks,
    Michael

    ReplyDelete
  2. Thanks! I was wondering which is fastest since I can't seem to get KVM to perform as fast as VirtualBox does even though all tests show KVM wins to VirtualBox.

    ReplyDelete
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