On 3/1/22 06:31, Patrick O'Callaghan wrote:
On Mon, 2022-02-28 at 18:26 -0500, Robert McBroom via users wrote:
On 2/28/22 08:56, Tom Horsley wrote:
On Mon, 28 Feb 2022 00:21:30 -0500
Robert McBroom via users wrote:
With 4 processors and 2G response is atrocious.
Make sure you are using proper virtual disk and network drivers.
If you installed it with some sort of emulated IDE disk, it will
definitely have the effect of making performance horrible. Also
the disk cache mode has an extreme effect on performance. I forget
which cache mode it was, but one of them dropped disk I/O about
98% slower when I was testing them.
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Exploring the use of VM's. Fairly plain install of CentOS8.
Understood
that Fedora server installed the VM structure. Where would one see
alternate drivers? Networking seems to be all set up but doesn't see
the
router or the outside internet.
If you install the VM using virt-manager, you can check the device
controller options directly. For disks and network interfaces, the
"virtio" option will generally give the best performance.
As regards the network, the virt-manager defaults should just work, but
for other stuff my personal notes say this:
Libvirt creates VMs in the libvirt firewall zone, so services must
be added there:
For NFS:
# firewall-cmd --add-service mountd --zone=libvirt
# firewall-cmd --permanent --add-service mountd --zone=libvirt
# firewall-cmd --add-service nfs --zone=libvirt
# firewall-cmd --permanent --add-service nfs --zone=libvirt
# firewall-cmd --add-service nfs3 --zone=libvirt
# firewall-cmd --permanent --add-service nfs3 --zone=libvirt
# firewall-cmd --add-service rpc-bind --zone=libvirt
# firewall-cmd --permanent --add-service rpc-bind --zone=libvirt
For Samba:
# firewall-cmd --add-service samba --zone=libvirt
# firewall-cmd --permanent --add-service samba --zone=libvirt
# firewall-cmd --add-service samba-client --zone=libvirt
# firewall-cmd --permanent --add-service samba-client --zone=libvirt
poc
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Installed from iso with virt-manager. The install used virtio. Not using
samba or nfs but added firewall commands anyway.
I can ping devices on the local network but can't get to the internet.
50 to 60% drops on the pings. Fully updated F35 server edition on host.
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