No QXL in CentOS 9 Stream?
by lejeczek
Hi.
There seems to be no QXL (and Spice?) support in versions
from CentOS 9 repos.
Would anybody know if that intended, because something else
replaces qxl perhaps?
thanks, L
3 years
Libvirt Snapshot Question
by Elias Mobery
Hi everybody!
I'm using a snapshot purely for writes and was wondering if it's possible
to clear/empty the snapshot after it reaches a certain size?
Created with:
virsh snapshot-create-as --disk-only
I tried deleting and recreating it but get an error at deletion:
virsh snapshot-delete
Error: source for disk 'vda' is not a regular file
I also tried virsh snapshot-create-as --no-metadata --disk-only
But the same error as above pops up when trying to delete.
Any ideas?
3 years
qemu-img create with extended_l2=on, followed by virt-install
by Richard Taubo
Hi!
I have read the following blog post: https://blogs.igalia.com/berto/2020/12/03/subcluster-allocation-for-qcow2... and watched the video displayed there.
1) To make qcow2 as fast as possible, does it make sense to do the following:
[#] qemu-img create -f qcow2 -o extended_l2=on,cluster_size=128k my_image.qcow2 1000GB
And then:
[#] virt-install —name=MyVM --disk path=my_image.qcow2,size=1000 . . .
Will this overwrite the qcow2 file already created or will it keep its characteristics?
Does it make sense?
2) I wont’t be moving the VM around much and have the space I need, so I wonder if it will be faster to do the following:
[#] qemu-img create -o preallocation=full -f qcow2 my_image.qcow2 1000GB
And then:
[#] ] virt-install —name=MyVM --disk path=my_image.qcow2,size=1000,bus=scsi,sparse=false . . .
(Running bus=scsi so I can trim the image ).
I could use a dedicated disk for the VM instead of using qcow2, but I like the flexibility of qcow2.
Thanks a lot for any information about this! :-)
Best regards,
Richard Taubo
3 years
