I got about 222 zfs file systems, wanted to upgrade from version 3 to version 4. How long does this operation take? I just ran zfs upgrade -a, and it is taking a while. truss show this repeatedly: ioctl(3, ZFS_IOC_SET_PROP, 0x08046180) = 0 ioctl(3, ZFS_IOC_OBJSET_STATS, 0x08044BF0) = 0 ioctl(3, ZFS_IOC_OBJSET_ZPLPROPS, 0x08046500) = 0 ioctl(3, ZFS_IOC_OBJSET_ZPLPROPS, 0x08044900) = 0 ioctl(3, ZFS_IOC_SET_PROP, 0x08046180) = 0 ioctl(3, ZFS_IOC_OBJSET_STATS, 0x08044BF0) = 0 ioctl(3, ZFS_IOC_OBJSET_ZPLPROPS, 0x08046500) = 0 ioctl(3, ZFS_IOC_OBJSET_ZPLPROPS, 0x08044900) = 0 ioctl(3, ZFS_IOC_SET_PROP, 0x08046180) = 0 ioctl(3, ZFS_IOC_OBJSET_STATS, 0x08044BF0) = 0 ioctl(3, ZFS_IOC_OBJSET_ZPLPROPS, 0x08046500) = 0 ioctl(3, ZFS_IOC_OBJSET_ZPLPROPS, 0x08044900) = 0 What do you guys think I should do? This is on production so I would rather not kill the zfs process. Just curious if this is going to take a while or not. Anil