I worked on that stockpile over the course of months, though that image is not the full breadth of the stockpile. I believe that accounts for 6 of the 11 or so guild banks I used for storage. I ended up with roughly 200 of each glyph in the game thanks to buying out several competitors and crafting stacks of glyphs absently while watching tv. Which has resulted in some very humorous hate mail (people who can't compete with my pre cata stock).
I've been making approximately 40K per week off of Glyphs alone and I'm still juggling several thousand on the AH at any given time.