Rodrigo what's a version and system nfs server? Network performance between host pod and storage it's ok? On Sat, 5 Aug 2017 at 14:03 Ivan Kudryavtsev <kudryavtsev...@bw-sw.com> wrote:
> Qcow2 does lazy allocation. Try to write big file inside VM with dd (say > 10GB), erase it and try again. May be lazy allocation works bad for your > raid5e. > > 5 авг. 2017 г. 23:29 пользователь "Rodrigo Baldasso" < > rodr...@loophost.com.br> написал: > > > Yes.. mounting an lvm volume inside the host works great, ~500Mb/s write > > speed.. inside the guest i'm using ext4 but the speed is aroung 30mb/s. > > > > - - - - - - - - - - - - - - - - - - - > > > > Rodrigo Baldasso - LHOST > > > > (51) 9 8419-9861 > > - - - - - - - - - - - - - - - - - - - > > On 05/08/2017 13:26:00, Ivan Kudryavtsev <kudryavtsev...@bw-sw.com> > wrote: > > Rodrigo, is your fio testing shows great results? What filesystem you are > > using? KVM is known to work very bad over BTRFS. > > > > 5 авг. 2017 г. 23:16 пользователь "Rodrigo Baldasso" > > rodr...@loophost.com.br> написал: > > > > Hi Ivan, > > > > In fact i'm testing using local storage.. but on NFS I was getting > similar > > results also. > > > > Thanks! > > > > - - - - - - - - - - - - - - - - - - - > > > > Rodrigo Baldasso - LHOST > > > > (51) 9 8419-9861 > > - - - - - - - - - - - - - - - - - - - > > On 05/08/2017 13:03:24, Ivan Kudryavtsev wrote: > > Hi, Rodrigo. It looks strange. Check your NFSconfiguration and network > > errors, loss. It should work great. > > > > 5 авг. 2017 г. 22:22 пользователь "Rodrigo Baldasso" > > rodr...@loophost.com.br> написал: > > > > Hi everyone, > > > > I'm having trouble to archive a good I/O rate using cloudstack qcow2 with > > any type of caching (or even disabled). > > > > We have some RAID-5e SSD arrays which give us a very good rates directly > on > > the node/host, but on the guest the speed is terrible. > > > > Does anyone knows a solution/workaround for this? I never used qcow (only > > raw+lvm) so I don't know much to do to solve this. > > > > Thanks! > > >
