>>> On 12/19/2014 at 09:46 AM, Mark Pace <[email protected]> wrote: > sles003:~> df -Ht > df: option requires an argument -- 't' > Try 'df --help' for more information. > sles003:~> df -H > Filesystem Size Used Avail Use% Mounted on > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% / > devtmpfs 460M 8.2k 460M 1% /dev > tmpfs 467M 0 467M 0% /dev/shm > tmpfs 467M 7.4M 460M 2% /run > tmpfs 467M 0 467M 0% /sys/fs/cgroup > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /.snapshots > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /var/tmp > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /var/spool > /dev/dasda1 204M 26M 168M 14% /boot/zipl > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /var/opt > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /var/lib/pgsql > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /var/lib/mailman > /dev/mapper/system-root 5.7G 2.5G 3.0G 46% /opt -snip-
OK, even though I got the switches wrong (should have been -hT) I can see what you've done. First, I'll reiterate my long-standing "don't put / on an LV" recommendation. Having the ability to boot from a read-only snapshot might make that less important, but I don't know that to be true yet. Since btrfs is new to everyone in an enterprise environment, I'm not sure what you've done is of any real benefit. A btrfs file system can span multiple physical (or virtual) volumes. So, you can do a btrfs device add dev1 dev2 /path/to/filesystem if extra space is needed. Having everything in one large btrfs on LVM doesn't help with the problem of a runaway process (or user) filling up everything, _unless_ you start using quotas. I suspect most people on this mailing list haven't bothered doing that up until now, so this would be one more new thing to deal with. It will be interesting to see what winds up working best for you and anyone else trying things out. Thanks for helping me understand your setup. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
