[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´╝čplease tell me?
>thanks!
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