During your experiment, you can always confirm what speeds are set on each VNET/NIC of the VM - this below, is 1Gbps limit (multiple 131072 by 8KB = 1Gbps)
root@XXXXX:~# virsh domiflist i-2-5-VM Interface Type Source Model MAC ------------------------------------------------------- vnet0 bridge brvx-812 virtio 02:00:05:6a:00:01 root@XXXXX:~# virsh domiftune i-2-5-VM vnet0 inbound.average: 131072 inbound.peak : 131072 inbound.burst : 0 outbound.average: 131072 outbound.peak : 131072 outbound.burst : 0 Or if root@XXXXXX:~# tc class show dev vnet0 class htb 1:1 root leaf 2: prio 0 rate 1049Mbit ceil 1049Mbit burst 1441b cburst 1441b Not very readable though... My experience so far (as Angus already explained) - Define network speed on Compute Offerings, don't really on global config - this set inbound/outbound speed on the NIC of the VM (vnetXYZ) - Define network speed on the Network Offering (Network offerings for VPC) - again dont rely on global config...this set inbound/outbound speed of the Public VR NIC - BUT ALSO ON ALL OHTER VR NIC... Anyone knows if possible to have public VR NIC to i.e. 100 Mbps, while all internal interfaces are 1Gbps ? I didn't find it possible so far...I see that all internal NIC always inherit pulbic NIC speed/traffic shaping Best Andrija On 31 October 2017 at 18:42, Paul Angus <paul.an...@shapeblue.com> wrote: > Hi Imran, > > I think there are a couple of issues here: > > 1. The egress bandwidth from VMs is controlled by the Compute Offering not > the VR Network offering (that controls egress out of the public face of the > VR) > 2. The fallback global setting for vm egress bandwidth is > vm.network.throttling.rate (if not set in the compute offering) > 3. to set something as unlimited, you would use '-1' not '0' > > I hope that this helps > > > Kind regards, > > Paul Angus > > paul.an...@shapeblue.com > www.shapeblue.com > 53 Chandos Place, Covent Garden, London WC2N 4HSUK > @shapeblue > > > > > -----Original Message----- > From: Eric Green [mailto:eric.lee.gr...@gmail.com] > Sent: 30 October 2017 19:05 > To: users@cloudstack.apache.org > Subject: Re: Bandwith limit on guests > > Did you try the same test from the exact same physical host that one of > the guests are running on? There may be congestion between the Cloudstack > network and the NFS network. > > I just tested this by creating a compute offering that had the 200Mbit > limit and assigning it to an instance. I mounted a NFS directory, and > dding' a large file in that directory. I got the 23 mbyte/sec throughput I > expected. I then shut the instance down, reassigned it to another compute > offering without the limit, started it back up, and dd'ed that large file. > I got the 200mbyte/sec throughput that I expected from this specific NFS > server. > > How exactly are you setting network and VM throttling? Are you talking > about in the Global Settings? If so, note that any limit set here (even > infinite -- i.e., zero) is overridden by the values in the service offering > if the service offering's values are smaller. Please check your service > offerings to make sure they don't have throttling values in them. Also make > sure that you put both network.throttling.rate and > vm.network.throttling.rate back down to zero. > > Note -- I am running Cloudstack 4.9.2. But it should work same as 4.8 here. > > > > On Oct 30, 2017, at 10:56, Imran Ahmed <im...@eaxiom.net> wrote: > > > > Hi All, > > > > WE are facing a bandwidth problem on our cloudstack guests. > > (cloudstack 4.8 with KVM on CentOS) > > > > The network and vm throttling was set at 200mbs, and we're seeing a > > max on the guests of 25MB/sec (just slightly over the throttle). I > > set the values to 0, restarted the management server and > > stopped/started the virtual router. However, the guests are still only > seeing 25MB/sec to an NFS share. > > I performed the same test to the same NFS share on a physical machine > > and it reached the full gigabit network speed (just over 100MB/sec). > > > > > > Any ideas please? > > > > Kind regards, > > > > Imran > > > > -- Andrija Panić
