On Wed, Nov 11, 2009 at 01:24:20PM -0600, Eric Sandeen wrote: > Anybody got actual numbers? I don't disagree that mkfs.ext4 is slow in > the default config, but I don't think it should be slower than mkfs.ext3 > for the same sized disks. Easy with guestfish: $ guestfish --version guestfish 1.0.78 $ for fs in ext2 ext3 ext4 xfs jfs ; do guestfish sparse /tmp/test.img 10G : run : echo $fs : sfdiskM /dev/sda , : time mkfs $fs /dev/sda1 ; done ext2 elapsed time: 5.21 seconds ext3 elapsed time: 7.87 seconds ext4 elapsed time: 6.10 seconds xfs elapsed time: 0.45 seconds jfs elapsed time: 0.78 seconds Note that because this is using a sparsely allocated disk each write to the virtual disk is very slow. Change 'sparse' to 'alloc' to test this with a non-sparse file-backed disk. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
