Just a comment - if you are setting up swap file on zfs or btrfs - make sure that you disable COW for the file/subvolume.
Tomas On Wed, Jul 1, 2020, 15:01 Paul Heinlein <[email protected]> wrote: > On Wed, 1 Jul 2020, Robert Kopp wrote: > > > I wanted to try this amazing new file system, which is now one of the > installation options for Focal. Unfortunately, I did not set up enough swap > space for hibernation, which I would like. So I'm wondering if anyone could > suggest a method of increasing swap space on my system, which appears below. > > I have plenty of USB ports, so I would even be open to using a flash > drive for this purpose. I note that it seems anxious to grab my external > storage device, so perhaps it would resume from something more appropriate. > > > > Filesystem 1K-blocks Used > Available Use% Mounted onudev > 16315052 0 16315052 0% /dev > > tmpfs 3278412 > 2136 3276276 1% /run > > rpool/ROOT/ubuntu_4uu5jb 450678784 4601088 > 446077696 2% / > > tmpfs 16392060 250784 > 16141276 2% /dev/shm > > tmpfs 5120 > 4 5116 1% /run/lock > > tmpfs 16392060 0 > 16392060 0% /sys/fs/cgroup > > bpool/BOOT/ubuntu_4uu5jb 1517056 > 276096 1240960 19% /boot > > rpool/ROOT/ubuntu_4uu5jb/var/games 446077824 128 > 446077696 1% /var/games > > rpool/ROOT/ubuntu_4uu5jb/var/snap 446077952 256 > 446077696 1% /var/snap > > rpool/USERDATA/robert_xnnmf3 452219392 6141696 > 446077696 2% /home/robert > > rpool/ROOT/ubuntu_4uu5jb/var/mail 446077824 128 > 446077696 1% /var/mail > > rpool/ROOT/ubuntu_4uu5jb/srv 446077824 128 > 446077696 1% /srv > > rpool/ROOT/ubuntu_4uu5jb/var/lib 447230720 1153024 > 446077696 1% /var/lib > > rpool/ROOT/ubuntu_4uu5jb/var/lib/NetworkManager 446077952 256 > 446077696 1% /var/lib/NetworkManager > > rpool/ROOT/ubuntu_4uu5jb/var/www 446077824 128 > 446077696 1% /var/www > > rpool/ROOT/ubuntu_4uu5jb/var/spool 446077952 256 > 446077696 1% /var/spool > > /dev/sda1 523248 > 21268 501980 5% /boot/efi > > rpool/ROOT/ubuntu_4uu5jb/var/log 446102400 24704 > 446077696 1% /var/log > > rpool/ROOT/ubuntu_4uu5jb/usr/local 446077824 128 > 446077696 1% /usr/local > > rpool/USERDATA/root_xnnmf3 446078208 512 > 446077696 1% /root > > rpool/ROOT/ubuntu_4uu5jb/var/lib/AccountsService 446077824 128 > 446077696 1% /var/lib/AccountsService > > rpool/ROOT/ubuntu_4uu5jb/var/lib/dpkg 446125184 47488 > 446077696 1% /var/lib/dpkg > > rpool/ROOT/ubuntu_4uu5jb/var/lib/apt 446144768 67072 > 446077696 1% /var/lib/apt > > If you want to use your rpool, and you've got the space to spare, > here's one way to go about it. This is for a 4GB swap partition. > > # create a zfs filesystem, with compression (optional) > zfs create -V 4G -b 4096 \ > -o compression=lz4 -o logbias=throughput -o sync=always \ > -o primarycache=metadata -o secondarycache=none \ > rpool/swap > > # make it into swap fs > mkswap -f /dev/zvol/rpool/swap > > # turn it on > swapon /dev/zvol/rpool/swap > > -- > Paul Heinlein > [email protected] > 45°38' N, 122°6' W_______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
