[OmniOS-discuss] horrible disk performance under KVM

[ashley willis]

that works for booting centos 6.4, but not for booting omnios -- grub
comes up but it keeps looping back to the grub menu. granted, i don't
really need to boot omnios in kvm. i had horrible performance in
centos as well, so i will try this.

for comparison to my home machine, on a work server i loaded that same
dataset in 4m10s (xeon 2*6 cores, 60GB ram, 12 600GB 10k SAS drives in
raid10) reading from disks in a different box.

-ashley

On Fri, Sep 13, 2013 at 3:50 PM, Narayan Desai <narayan.desai at gmail.com> wrote:
> Depending on the availability of the guest-side drivers, it should be a lot
> faster to use virtio, both for disk and net.
>
> Does anyone know if virtio support ships now in OmniOS? I know there have
> been some drivers floating around for a while now, but haven't tried them.
>  -nld
>
>
> On Fri, Sep 13, 2013 at 1:45 PM, ashley willis <ashleywillis76 at gmail.com>
> wrote:
>>
>> I have 14GB dump of a MongoDB database that took 10 minutes to restore
>> on bare metal OmniOS -- I'm fine with this (system is an 8-core AMD
>> FX-8150, 32GB ram, pair of 500GB WD 'blue" drives mirrored, 90GB ssd
>> cache -- all desktop-grade).
>>
>> Running OmniOS under KVM on this box, the same operation took 246
>> minutes with the dump available over an NFS share from the bare metal
>> system (given 2 cores, 2GB ram, and a 30GB zvol).
>>
>> Under the same KVM instance, I decided to see the performance reading
>> the dump from NFS and having the MongoDB data directory on this same
>> NFS share, and it's on track to finish in under 60 minutes (half-way
>> done). That's more than 4 times faster.
>>
>> What gives?
>>
>> /usr/bin/qemu-system-x86_64 -name OmniOS_Text_r151006p.iso -enable-kvm
>> -vnc 0.0.0.0:15 -smp 2 -m 2048 -no-hpet -localtime -drive
>> file=/dev/zvol/rdsk/rpool/omnios,if=ide,index=0 -net
>> nic,vlan=0,name=net0,model=e1000,macaddr=2:8:20:e:15:33 -net
>> vnic,vlan=0,name=net0,ifname=vnic10,macaddr=2:8:20:e:15:33 -vga std
>> -daemonize
>>
>> -ashley
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>
>