[PVE-User] vm's disk io lower with local highspeed disk?
haoyun
haoyun-kgq at 163.com
Tue Jun 14 08:00:41 CEST 2016
my iscsi remote storage is dell nx3200
my vm's disk io is below with iscsi remote storage:
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
vda 0.00 190.00 12.00 713.00 96.00 7224.00 10.10 0.32 0.43 0.31 22.80
this is redress data
At 2016-06-14 13:53:29, "haoyun" <haoyun-kgq at 163.com> wrote:
>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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