Hi Andrija, i figured out the problem. templates should be created as OS: Other PV Virtio-SCSI (64-bit) otherwise, vm disk will created as an IDE Device.
Afther changing the setting i got my Performance and a well working environment. Kind regards Ben > > Andrija Panic <andrija.pa...@gmail.com> hat am 5. August 2018 um 11:05 > geschrieben: > > Hi, > > Google "enable rbd cache on KVM" - this is supposed to enable write back > cache if client OS sends proper flush commands (i.e. linux kernel newer > than 3.0) - will NOT help with reads, obviously... > > For rest, there can be done some tunning, but expect no miracle. > > You didn't specify ceph cluster details, journals setup, etc - would be > useful to know, then KVM host version, etc. > > Cheers > > On Fri, Aug 3, 2018, 16:05 Benjamin Naber <benjamin.na...@coders-area.de> > wrote: > > > > > > Hi @all, > > > > ive setup a Ceph Cluster in combination with KVM Hosts. If i > > benchmark > > ceph rbd performance from Hypervisor itself i got 10 times higher > > performance than from using a cloudstack created guest-vm. > > are there any recommendet settings for KVM Hosts in cloudstack or > > KVM > > using with ceph rbd ? > > > > kind regards > > Ben > > > > >
