On Mon, 21 Sep 2015 23:16:26 -0500
"David C. Rankin" [off-list ref] wrote:

This is the exact reason NOT to use btrfs at the moment. The issue is 
with the 'snap shotting' feature which can quietly fill your disk with 
snap shots to the point of space exhaustion that has resulted in the 
complete loss of information in a number of instances.

Snapshots is not something Btrfs "quietly" makes on its own, snapshots are
something *you* create. Snapshots of static and unmodified data are essentially
free in terms of disk space (due to CoW only the changes from the point
snapshot was taken and further on, will require additional space); and if you
heavily modify your files and want to also keep a trail of snapshots, it's of
course up to you to ensure you have enough disk space for that.

-- 
With respect,
Roman