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 >
