----- Forwarded message from braindevices <notifications(a)github.com&gt; ----- Subject: [libguestfs/libguestfs] is there a way to set discard=unmap when using guestmount? (#52) I cannot find anything in the document. This option is very important for dynamic qcow2 disks. Without out this the IO is super slow even on tmpfs only 3MB/s. Subject: Re: [libguestfs/libguestfs] is there a way to set discard=unmap when using guestmount? (#52) Not using guestmount, but it's possible to do it using the API directly and therefore from guestfish, something like this: ``` guestfish <<EOF add disk.img discard:unmap run mount /dev/sda / mount-local /tmp/mp mount-local-run EOF ``` See also: https://rwmj.wordpress.com/2012/03/29/libguestfs-mount-local/ ----- End forwarded message ----- -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW