[PVE-User] vm's disk io lower with local highspeed disk?

[haoyun]

fio command is : ./fio -filename=/dev/vda -direct=1 -iodepth 1 -thread -rw=randwrite -ioengine=psync -bs=16k -size=4G -numjobs=30 -runtime=100 -group_reporting -name=mytest


vmconfig:
balloon: 1024
bootdisk: virtio2
cores: 2
ide2: none,media=cdrom
memory: 4096
name: tt
net0: bridge=vmbr0,e1000=66:37:31:32:34:37
numa: 0
ostype: l26
smbios1: uuid=ce775a6f-6652-43c4-aa92-69ffd3d20013
sockets: 1
virtio0: local-highspeed:vm-255-disk-2,size=60G
virtio2: local-highspeed:vm-255-disk-1,size=8G


raid10 is physical host's Raid-10 with 6 disks(SAS 10k 600G)


local-highspeed is LogicalVolume on Raid-10

"do you have cache on your raid controller ?" I don't know what's means?



At 2016-06-14 17:59:17, "Alexandre DERUMIER" <aderumier at odiso.com> wrote:
>>>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util 
>>>vda 0.00 71.00 8.00 226.00 64.00 2368.00 10.39 1.37 5.85 4.24 99.10 
>>>but I test disk random write is better with fio tools, 
>>>bw=21518KB/s iops=1344 
>
>
>do you have cache on your raid controller ?
>
>can you send the fio job config?
>
>can you send vmconfig ?
>
>what is the local raid10 filesystem ?
>
>
>
>
>----- Mail original -----
>De: "haoyun" <haoyun-kgq at 163.com>
>À: "proxmoxve" <pve-user at pve.proxmox.com>
>Envoyé: Mardi 14 Juin 2016 07:53:29
>Objet: [PVE-User] vm's disk io lower with local highspeed disk?
>
>hello everyone~ 
>
>
>I have a problem, 
>I have a new host is Dell R330, 
>run pve4.2 os 
>disk with 2 raid,one is raid1,another is raid10(sas 10k 600G * 6) 
>raid1 as system disk,raid10 as vm images 
>my mysql slave run on this vm with raid10 local disk(lvm). 
>the question is this vm's disk io is very slow, 
>that's why? 
>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util 
>vda 0.00 71.00 8.00 226.00 64.00 2368.00 10.39 1.37 5.85 4.24 99.10 
>but I test disk random write is better with fio tools, 
>bw=21518KB/s iops=1344 
>same vm,I use iscsi remote storage better than it, 
>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util 
>vda 0.00 0.00 0.00 3.00 0.00 24.00 8.00 0.00 0.33 0.33 0.10 
>that's why? 
>who can help me? 
>What information is needed？please tell me? 
>thanks! 
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