Hi everybody,
using RDO IceHouse packages I've set up an infrastructure atop of
RHEL6.6 and am seeing a very unpleasant performance for the storage.
I've done some testing and here's what I get from the same storage: but
different access points:
cinder-volume # dd if=/dev/zero of=baloon bs=10485
> using RDO IceHouse packages I've set up an infrastructure atop of
> RHEL6.6 and am seeing a very unpleasant performance for the storage.
>
>cinder-volume # dd if=/dev/zero of=baloon bs=1048576 count=200
>
>Results are just miserable. going from 1.2G/s down to 20M/s seems to be a big
>degradation.
On 12/23/2014 01:38 AM, Robert van Leeuwen wrote:
>> using RDO IceHouse packages I've set up an infrastructure atop of
>> RHEL6.6 and am seeing a very unpleasant performance for the
>> storage.
>>
>> cinder-volume # dd if=/dev/zero of=baloon bs=1048576 count=200
>>
>> Results are just miserable.
> from above numbers it doesn't sound like storage node is the culprit -
> 50% drop happens on compute node going from baremetal to virtual. So I'm
> inclined to think it's a tuning of virtio (if that is even possible).
Some tuning tips for kvm: http://www.linux-kvm.org/page/Tuning_KVM
We saw a m
