Performance so so

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vkeven

Active Member
Dec 22, 2009
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Ml350 G6 , Xeon 5506 , 4GB , 146GB SAS 15K RAID1 with RAID Card(P410) 512MB BBU , write cache enabled , FSYNC around 1450 and troughput

Native Speed with Bonnie ++ 2G:512K give me almost 600MB/s

Debian Lenny 32bit KVM with IDE drive give me 117MB/s and various test with different size look similar , 1/6 of native performance :(
 
pls also post the details about your software setup (pveversion -v and the config file of the KVM guest- /etc/qemu-server/VMID.conf)

also try with with virtio disks.
 
vkeven said:
Ml350 G6 , Xeon 5506 , 4GB , 146GB SAS 15K RAID1 with RAID Card(P410) 512MB BBU , write cache enabled , FSYNC around 1450 and troughput

Native Speed with Bonnie ++ 2G:512K give me almost 600MB/s

Debian Lenny 32bit KVM with IDE drive give me 117MB/s and various test with different size look similar , 1/6 of native performance :(
Click to expand...

Hi,
you should use min. doubled size of ram as diskfile with bonnie: mean 8G:512k.
I think you test also ram-speed ;)
600MB/s is very high - how many disks you have in which raid-level?
What is the output of
Code: 
pveperf /var/lib/vz

Udo
 
udo said:
Hi,
you should use min. doubled size of ram as diskfile with bonnie: mean 8G:512k.
I think you test also ram-speed ;)
600MB/s is very high - how many disks you have in which raid-level?
What is the output of
Code: 
pveperf /var/lib/vz

Udo
Click to expand...

4G:512K give me 175Mb/s native and 25MB/s KVM ( still with IDE drive )
 
pve-manager: 1.5-5 (pve-manager/1.5/4627)
running kernel: 2.6.18-2-pve
proxmox-ve-2.6.18: 1.5-5
pve-kernel-2.6.18-2-pve: 2.6.18-5
qemu-server: 1.1-11
pve-firmware: 1.0-3
libpve-storage-perl: 1.0-8
vncterm: 0.9-2
vzctl: 3.0.23-1pve8
vzdump: 1.2-5
vzprocps: 2.0.11-1dso2
vzquota: 3.0.11-1
pve-qemu-kvm-2.6.18: 0.9.1-5
 
serveur:~# pveperf /var/lib/vz
CPU BOGOMIPS: 17067.36
REGEX/SECOND: 688970
HD SIZE: 92.72 GB (/dev/mapper/pve-data)
BUFFERED READS: 132.39 MB/sec
AVERAGE SEEK TIME: 4.68 ms
FSYNCS/SECOND: 2854.42
DNS EXT: 42.90 ms
DNS INT: 77.87 ms (kapta.ca)

name: Debian_Lenny
vlan0: e1000=42:06:F5:8A:A3:CE
bootdisk: ide0
ostype: l26
memory: 1024
onboot: 1
sockets: 1
boot: cad
freeze: 0
cpuunits: 1000
acpi: 1
kvm: 1
cores: 1
virtio1: lvm_data:vm-101-disk-1 ( /home/archive ) 250GB SATA 7.2K RAID1
ide0: local:101/vm-101-disk-2.raw ( / ) can't boot lenny on virtio disk
virtio0: local:101/vm-101-disk-1.raw ( /home ) 146GB SAS 15K RAID 1
ide1: local:iso/debian-504-i386-netinst.iso,media=cdrom

I benched every 3 volume and the result are simply bad

bonnie++ -s 2G:512k -q -d /tmp -u root ( ide volume )
Version 1.03d ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size:chnk K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
servlinux2 2G:512k 39822 97 46923 9 74319 12 39977 97 354329 52 720.8 23

bonnie++ -s 2G:512k -q -d /home -u root ( raw file virtio )
Version 1.03d ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size:chnk K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
servlinux2 2G:512k 26531 71 25524 7 82715 20 32316 97 399141 53 1074 74

bonnie++ -s 2G:512k -q -d /home/archive -u root ( lvm direct SATA )
Version 1.03d ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size:chnk K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
servlinux2 2G:512k 34054 95 45525 9 57998 9 32899 98 374823 67 1034 74

so 132MB/s divised by 6 = 22MB/s
 
So its the way it is ? I tried different VM settings with various RAM/CPU's/CORE's and 30 to 40 MB/s is the maximum I could get from VM Machine , everywhere I read than KVM is WAY better than vmware for speed , someone here really reached 80% of native performance with KVM or its another dream
 
vkeven said:
So its the way it is ? I tried different VM settings with various RAM/CPU's/CORE's and 30 to 40 MB/s is the maximum I could get from VM Machine , everywhere I read than KVM is WAY better than vmware for speed , someone here really reached 80% of native performance with KVM or its another dream
Click to expand...

Hi,
i made some tests and can't reproduce your issue. Of course, kvm eat performance, but not so much.
Here my results.

On a kvm-vm with one core, ubuntu and a 50GB virtio-disk:
Code: 
# bonnie++ -u root -f -n 0 -r 8000 -d testdir                         
Version 1.03c       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
bonnie-virtio  16G           149804  27 49167  11           182380  19  1441   9
bonnie-virtio,16G,,,149804,27,49167,11,,,182380,19,1441.3,9,,,,,,,,,,,,,

# echo 3 > /proc/sys/vm/drop_caches
# dd if=/dev/zero of=bigfile bs=1024k count=8192 conv=fdatasync
8192+0 Datensätze ein
8192+0 Datensätze aus
8589934592 Bytes (8,6 GB) kopiert, 153,525 s, 56,0 MB/s

# echo 3 > /proc/sys/vm/drop_caches # also on the host!
# dd if=bigfile of=/dev/null bs=1024k
8192+0 Datensätze ein
8192+0 Datensätze aus
8589934592 Bytes (8,6 GB) kopiert, 47,7465 s, 180 MB/s

On the host:
Code: 
proxmox1:~# pveperf /var/lib/vz
CPU BOGOMIPS:      27293.44
REGEX/SECOND:      1070643
HD SIZE:           543.34 GB (/dev/mapper/pve-data)
BUFFERED READS:    442.47 MB/sec
AVERAGE SEEK TIME: 5.68 ms
FSYNCS/SECOND:     5131.07
DNS EXT:           104.81 ms
DNS INT:           0.58 ms

proxmox1:/var/lib/vz# bonnie++ -u root -f -n 0 -r 8000 -d testdir
Version 1.03d       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
proxmox1        16G           240423  28 121809  11           501508  20 855.3   0
proxmox1,16G,,,240423,28,121809,11,,,501508,20,855.3,0,,,,,,,,,,,,,

240MB/s without virtualisation and round 150MB/s with virtualisation - i think it's ok.
OK, normaly i must use 32GB testfile for this host - but the time....

Udo
 
vkeven said:
could you post your vmid.conf , raw files or lvm group ?
Click to expand...

Of course!
I use raw-files to test the local storage.
Code: 
# more /etc/qemu-server/119.conf 
name: bonnie-virtio
sockets: 1
vlan4: virtio=8A:B2:BF:39:03:89
ostype: l26
memory: 1500
virtio0: local:119/vm-119-disk-1.raw
boot: c
freeze: 0
cpuunits: 1000
acpi: 1
kvm: 1
ide2: none,media=cdrom
bootdisk: virtio0
onboot: 0
cores: 1

Udo
 
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