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Re: [Xen-users] poor IO performance with dom0 on centos7

Am 2015-09-01 10:51, schrieb Roger Pau MonnÃ:

El 01/09/15 a les 6.11, Christoph ha escrit:

Is the performance in Dom0 as expected?

As far as I see, yes

Can you paste the DomU configuration files?


cat /etc/xen/leviathan.cfg
name            = "leviathan"
kernel          = "/usr/lib/xen/boot/pv-grub-x86_64.gz"
extra           = "(hd0)/boot/grub/grub.conf"
vcpus           = 4
memory          = 3072
disk = [ 'phy:/dev/vg_lilith/lv_leviathan_root,xvda,w','phy:/dev/vg_lilith/lv_leviathan_swap,xvdb,w', 'phy:/dev/vg_lilith/lv_leviathan_home,xvdc,w' ] vif = [ 'bridge=xenbr5,mac=00:16:3E:05:31:60,script=vif-bridge','bridge=xenbr15,mac=00:16:3E:15:31:60,script=vif-bridge','bridge=xenbr2,mac=00:16:3E:02:31:60,script=vif-bridge', 'bridge=xenbr4,mac=00:16:3E:04:31:60,script=vif-bridge', 'bridge=xenbr14,mac=00:16:3E:14:31:60,script=vif-bridge' ]
on_poweroff     = 'destroy'
on_reboot       = 'restart'
on_crash        = 'restart'

Are both network and disk slow, or only one of them? I would recommend
using fio/iperf in order to figure out which one is the bottleneck, or
if both are.

I think network in any case... the leviathan gets files from satan over nfs, uncompress them and write it again on nfs from satan...


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