Just a quick try on my new Solaris 11.4… The reflink() function creates a new file with the content of an existing file without reading or writing the underlying data blocks.
root@t7primary01:/downloads# uname -a SunOS t7primary01 5.11 11.4.0.15.0 sun4v sparc sun4v root@t7primary01:/downloads# df -h . Filesystem Size Used Available Capacity Mounted on rpool/downloads 1.1T 52G 999G 5% /downloads root@t7primary01:/downloads# ls -lh zones.dump -rw-r--r-- 1 root root 50G Jul 30 09:49 zones.dump root@t7primary01:/downloads# time cp -z zones.dump zones.dump.zfs.reflink real 0m11.481s user 0m0.001s sys 0m1.932s root@t7primary01:/downloads# df -h . Filesystem Size Used Available Capacity Mounted on rpool/downloads 1.1T 102G 998G 10% /downloads root@t7primary01:/downloads# ls -lh zones.dump* -rw-r--r-- 1 root root 50G Jul 30 09:49 zones.dump -rw-r--r-- 1 root root 50G Aug 31 17:29 zones.dump.zfs.reflink root@t7primary01:/downloads#
That’s cool, isn’t it… might be confusing but seems to be something like a relinking clone which could be very usefull saving space and time…
seems to be here but not really… may become confusing 🙂
used my zfsize:
root@t7primary01:/downloads# $HOME/scripts/zfsize -z rpool/downloads ZFS = rpool/downloads Mountpoint = /downloads TempDir = /tmp This may take a while ... FILE SIZE /downloads/zones.dump 51331.97 MB /downloads/zones.dump.zfs.reflink 51331.97 MB root@t7primary01:/downloads#