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

[haoyun]

same vm , with local disk :
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
with remote disk(dell NX3200 with iscsi)
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
vda  0.00  732.00  29.00  1652.00  232.00 19064.00  11.48  0.79  0.47  0.34  57.40








At 2016-06-15 09:51:03, "haoyun" <haoyun-kgq at 163.com> wrote:
>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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