On 21/04/2015 11:53, Konstantin Krotov wrote:
>> Can you detail the problem more? That could be a kernel bug.
>
> I connect to the host system, two storage systems as block devices. Both
> block devices combine md-raid1. md-device use as disk for virtual
> machine. If i use io=native, read perf
16.04.2015 14:57, Paolo Bonzini пишет:
On 16/04/2015 13:17, Konstantin Krotov wrote:
In my production system i'm interested to use io=thread, becouse i
export MD raid1 devices to guest's and i need to read from the MD device
performs balanced between raid1 legs (it's true only if io=thread).
On 16/04/2015 13:17, Konstantin Krotov wrote:
> In my production system i'm interested to use io=thread, becouse i
> export MD raid1 devices to guest's and i need to read from the MD device
> performs balanced between raid1 legs (it's true only if io=thread).
Can you detail the problem more? Tha
16.04.2015 04:27, Fam Zheng пишет:
On Wed, 04/15 11:17, Konstantin Krotov wrote:
Hello list!
I performed tests with fio and obtained results:
*** virtio-scsi with cache=none, io=threads, blok device is md-device from
mdadm raid1, random r/w, 32 thread from guest (debian, kernel 3.16):
fio f
On 16/04/2015 03:27, Fam Zheng wrote:
>
> virtio-scsi, on the other hand, provides more features and means to be more
> scalable (you won't need to painfully mess with pci bridges to attach 1000
> disks).
>
> Anyway, we are working on improving virtio-scsi performance, although it's
> theoretic
On Wed, 04/15 11:17, Konstantin Krotov wrote:
> Hello list!
>
> I performed tests with fio and obtained results:
>
> *** virtio-scsi with cache=none, io=threads, blok device is md-device from
> mdadm raid1, random r/w, 32 thread from guest (debian, kernel 3.16):
>
> fio fio1
> readtest: (g=0): r
Hello list!
I performed tests with fio and obtained results:
*** virtio-scsi with cache=none, io=threads, blok device is md-device
from mdadm raid1, random r/w, 32 thread from guest (debian, kernel 3.16):
fio fio1
readtest: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio,
iodepth=32
