Just in case this poor horse isn't suitably beaten yet. 1. Create 4 qcow2 files per qemu-img create -f qcow2 *.qcow2 120g Each qcow2 starts out 194K (not preallocated). q 2. Format each qcow2 mkfs.ext4 <dev> mkfs.ext4 -i 4096 <dev> mkfs.xfs <dev> mkfs.btrfs <dev> 3. mount each fs (mainly to be fair since ext4 does lazy init) and wait until the qcow2 stops growing. 5.5M -rw-r--r--. 1 qemu qemu 5.9M Sep 19 20:40 bios_btrfs.qcow2 2.1G -rw-r--r--. 1 root root 2.1G Sep 19 20:27 bios_ext4_default.qcow2 7.7G -rw-r--r--. 1 root root 7.7G Sep 19 20:33 bios_ext4_i4096.qcow2 62M -rw-r--r--. 1 qemu qemu 62M Sep 19 20:40 bios_xfs.qcow2 Btrfs and XFS take seconds to completely initialize. Ext4 defaults took 6 minutes, and with -i 4096 it took 8 minutes to complete lazy init. -- Chris Murphy _______________________________________________ cloud mailing list -- cloud@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to cloud-leave@xxxxxxxxxxxxxxxxxxxxxxx
