if I mount through guestfs library in python or guestfish, the same condition happenes? I mean the insane number of layers and the performance 2017-07-31 16:52 GMT+08:00 Richard W.M. Jones <rjones@redhat.com>:
On Mon, Jul 31, 2017 at 09:49:00AM +0100, Richard W.M. Jones wrote:
On Mon, Jul 31, 2017 at 12:20:10PM +0800, lampahome wrote:
I mount the disk.qcow2 on the /home/test/, and create a 50GB file.
Mount the disk how?
OK, subject says using guestmount.
I'm surprised the slowdown isn't more than 95%. It's using FUSE which goes through an insane number of layers, see the "Update" section in this post:
https://rwmj.wordpress.com/2009/10/30/fuse-support-for-libguestfs/
Rich.
-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~ rjones Read my programming and virtualization blog: http://rwmj.wordpress.com libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org