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

[Alexandre DERUMIER]

>>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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