Monday, April 19, 2010

Disk Performance Xen/Kvm with LVM and Para-virt drivers


Summary:
  • For KVM, there is a 5-10% penalty on both read and write.
  • For XEN, the penalty is much larger for read/write, but seek time is better.
Test Setup:

Xen: 7GB memory, 8 VCPU
KVM: 8GB memory, 8 VCPU
Native: 8GB memory, 8CPU

Test command:

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

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