>> as good as a collective suicide in the long run What do you mean?
On Tue, Apr 7, 2020 at 8:48 PM Andrija Panic <andrija.pa...@gmail.com> wrote: > Shared mount point is used to "mount" i.e. attached a shared drive > (enclosure, LUN, etc) to the same mount point on multiple KVM hosts and > then run a shared file system on top (GFS2, OCFS, etc - all of which are as > good as a collective suicide in the long run...) > > Stick to local - and you do understand the risk with RADI 0, right? > > On Tue, 7 Apr 2020 at 18:01, Fariborz Navidan <mdvlinqu...@gmail.com> > wrote: > > > I managed to use Shared Mount Point to for local primary storage but it > > does not allow over-provisioning. I guess direct local storage also does > > not allow over-provisioning. > > > > On Tue, Apr 7, 2020 at 8:21 PM Simon Weller <swel...@ena.com.invalid> > > wrote: > > > > > Ceph uses data replicas, so even if you only use 2 replicas (3 is > > > recommend), you'd basically have best case of the IO of a single drive. > > > You also need to have a minimum of 3 management nodes for Ceph, so > > > personally, I'd stick with local storage if you're focused on speed. > > > You're also running quite a risk by using RAID-0. A single drive > failure > > > and you'll lose all of your data. Is there a reason you are using NFS > and > > > not just direct local storage? > > > > > > > > > ________________________________ > > > From: Fariborz Navidan <mdvlinqu...@gmail.com> > > > Sent: Tuesday, April 7, 2020 10:36 AM > > > To: users@cloudstack.apache.org <users@cloudstack.apache.org> > > > Subject: I/O speed in local NFS vs local Ceph > > > > > > Hello, > > > > > > I have a single physical host running CloudStack. Primary storage is > > > currently mounted as a NFS share. The underlying filesystem is XFS > > > running on top of Linux Soft RAID-0. The underlying hardware consists > of > > 2 > > > SSD-NVMe drives. > > > > > > The question is that, could I reach faster I/O on VMs if I would use > Ceph > > > adding 2 physical devices directly to the cluster and expose it via > RBD? > > > How much could it make the I/O faster? > > > > > > Thanks > > > > > > > > -- > > Andrija Panić >
