gistfile1.txt

ubuntu@ip-172-31-52-111:~$ df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            7.4G     0  7.4G   0% /dev
tmpfs           1.5G   41M  1.5G   3% /run
/dev/xvda1       28G   28G     0 100% /
tmpfs           7.4G  196K  7.4G   1% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           7.4G     0  7.4G   0% /sys/fs/cgroup
/dev/xvdb        64G   52M   61G   1% /mnt
tmpfs           1.5G   24K  1.5G   1% /run/user/1000
ubuntu@ip-172-31-52-111:~$ df -i
Filesystem      Inodes  IUsed   IFree IUse% Mounted on
udev           1922899    332 1922567    1% /dev
tmpfs          1924895    489 1924406    1% /run
/dev/xvda1     3584000 553530 3030470   16% /
tmpfs          1924895      7 1924888    1% /dev/shm
tmpfs          1924895      3 1924892    1% /run/lock
tmpfs          1924895     16 1924879    1% /sys/fs/cgroup
/dev/xvdb      4259840     11 4259829    1% /mnt
tmpfs          1924895     18 1924877    1% /run/user/1000
ubuntu@ip-172-31-52-111:~$ 

Happened again on the production machine, note the disk is full but only 16% of inodes are used.