kvm (qemu) speed virtio
Good day. Very little speed drives Virtio. Drivers are the latest guest on the system "Windows server 2008". Host system centos 6.5.
All that can be tried, but failed to increase the speed. And there I have a database running.
Screenshots test speed drives
http://itmages.ru/image/view/1471772/feec35c3 <http://itmages.ru/image/view/1471772/feec35c3>
http://itmages.ru/image/view/1471774/2b0baeae <http://itmages.ru/image/view/1471774/2b0baeae>
http://itmages.ru/image/view/1471785/9fffb8f5 <http://itmages.ru/image/view/1471785/9fffb8f5>
Thanks in advance. Apply nowhere else.
We may have seen this as well. Initial speed tests were actually pretty good, but after running a few IO test it would actually cause the physical disks that were dedicated to the windows vm host side to be stuck at 100% util with no throughput for 30 seconds at a time according to iostat. We were using noop scheduler on the disks. I think it's something with your host, as we stopped seeing it when we moved from stock CentOS 6.5 kernel to vanilla 3.10 kernel. Sorry I don't have more info on the cause, we saw the issue for a few days but were already upgrading due to the need for vxlan, so we didn't bother investigating.
Quoted 20 lines · XliN
Good day. Very little speed drives Virtio. Drivers are the latest guest on the system "Windows server 2008". Host system centos 6.5.
All that can be tried, but failed to increase the speed. And there I have a database running.
Screenshots test speed drives
http://itmages.ru/image/view/1471772/feec35c3
<http://itmages.ru/image/view/1471772/feec35c3>
http://itmages.ru/image/view/1471774/2b0baeae
<http://itmages.ru/image/view/1471774/2b0baeae>
http://itmages.ru/image/view/1471785/9fffb8f5
<http://itmages.ru/image/view/1471785/9fffb8f5>Thanks in advance. Apply nowhere else.
--
To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
04.02.2014 20:32, Marcus пишет:
Quoted 11 lines
We may have seen this as well. Initial speed tests were actually pretty good, but after running a few IO test it would actually cause the physical disks that were dedicated to the windows vm host side to be stuck at 100% util with no throughput for 30 seconds at a time according to iostat. We were using noop scheduler on the disks. I think it's something with your host, as we stopped seeing it when we moved from stock CentOS 6.5 kernel to vanilla 3.10 kernel. Sorry I don't have more info on the cause, we saw the issue for a few days but were already upgrading due to the need for vxlan, so we didn't bother investigating.
Quoted 21 lines
Quoted 20 lines · XliN
Good day. Very little speed drives Virtio. Drivers are the latest guest on the system "Windows server 2008". Host system centos 6.5.
All that can be tried, but failed to increase the speed. And there I have a database running.
Screenshots test speed drives
http://itmages.ru/image/view/1471772/feec35c3
<http://itmages.ru/image/view/1471772/feec35c3>
http://itmages.ru/image/view/1471774/2b0baeae
<http://itmages.ru/image/view/1471774/2b0baeae>
http://itmages.ru/image/view/1471785/9fffb8f5
<http://itmages.ru/image/view/1471785/9fffb8f5>Thanks in advance. Apply nowhere else.
--
To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Offer a kernel upgrade to 3.10 on centos 6.5? Whether it will survive the host system? =)