Salutations
to all members, first off. This is my first post in the
discussion group.
I would
like to ask if anyone else had troubles with the network
performance in the guest network. I am running qemu using ubuntu-14.04
as host. The guest is also ubuntu-14.04. In the
guest OS, I have a LAMP stack properly configured. Users can
reach the apache server inside via a host NATed tap interface.
Anything poking the host at port 80 is passed into the private
network between the guest/host. This all works well, and seems
to be OK. Users can view websites and download files hosted in
the guest LAMP.
Except,
users are getting very limited download speeds. While the host
sits on a 100Mbps symmetric up/down link, users are only able
to download at 15Kbps or max 30Kbps. I used to have the same
setup running natively without QEMU and user download speeds
were great. Once I moved the LAMP stack into the virtual
machine, this issue came up. The following is the command line
used to start up the qemu vm.
qemu-system-x86_64 -hda disk1.qcow -m 1G
-smp 4 -enable-kvm -netdev
tap,id=tap0,ifname=tap0,script=tap-config.sh -device
e1000,netdev=tap0
Call me
naive here, but is this kind of network performance expected?
The guest OS is unusable.