Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Mimiko
On 20.02.2017 18:45, Jakob Bohm wrote: Is /tmp/ the same drive (mount) as /vdisks/ ? Oh, really. /tmp is differen drive: an SSD mirror via MB sata 2 interface. time dd if=/dev/zero of=/vdisks/test oflag=direct bs=64k count=16000 16000+0 records in 16000+0 records out 1048576000 bytes (1.0 GB)

Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Jakob Bohm
On 20/02/2017 17:30, Mimiko wrote: On 20.02.2017 17:42, Vincenzo Romano wrote: I think you have to first check your barebones disk I/O throughput. If you mean running: time dd if=/dev/zero of=/tmp/test oflag=direct bs=64k count=16000 16000+0 records in 16000+0 records out 1048576000 bytes (1.

Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Mimiko
On 20.02.2017 17:42, Vincenzo Romano wrote: I think you have to first check your barebones disk I/O throughput. If you mean running: time dd if=/dev/zero of=/tmp/test oflag=direct bs=64k count=16000 16000+0 records in 16000+0 records out 1048576000 bytes (1.0 GB) copied, 6.91783 s, 152 MB/s r

Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Vincenzo Romano
I am glad I misunderstood your report! Someone else already suggested you to test "bare bones" disk I/O performances -- Vincenzo Romano - NotOrAnd.IT Information Technologies -- NON QVIETIS MARIBVS NAVTA PERITVS 2017-02-20 14:07 GMT+01:00 Mimiko : > On 20.02.2017 13:13, Vincenzo Romano wrote: >>

Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Mimiko
On 20.02.2017 13:13, Vincenzo Romano wrote: I could be wrong, but are you willing to run a VM with a disk image over CIFS/SAMBA? If not, why are you quoting your network throughput? No, I do not share a disk image via cifs/samba. This is a test machine, mostly used for compiling, and I shared

Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Jakob Bohm
On 20/02/2017 12:05, Mimiko wrote: Hello. I've setup qemu / kvm on Debian Wheezy to host some Debian Jessie guests. I create disk like this: virsh vol-create-as --pool default --name root.vhd --capacity 50G --format vpc Then create a virtual with this: virt-install --connect qemu:///system \

Re: [Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Vincenzo Romano
Hi. I could be wrong, but are you willing to run a VM with a disk image over CIFS/SAMBA? If not, why are you quoting your network throughput? Could you please try (on a separate test VM) raw and qcow2? In understand your concerns about the disk space allocation, but if you create a virtual disk o

[Qemu-discuss] virtual disks perfermonca <=2MB/s

2017-02-20 Thread Mimiko
Hello. I've setup qemu / kvm on Debian Wheezy to host some Debian Jessie guests. I create disk like this: virsh vol-create-as --pool default --name root.vhd --capacity 50G --format vpc Then create a virtual with this: virt-install --connect qemu:///system \ --ram 2048 \ --vcpus=4 \ --cpuset=aut