Ed Leonard, CTO of DreamWorks Animation, says it took about 45.6 million hours to make "Monsters vs. Aliens", more than eight times as many as the first "Shrek". Many hundred Hewlett-Packard xw8600 workstations were used, along with a large and powerful "render farm" of HP ProLiant blade servers. It had over 9,000 server cores, to read through the animation. The movie had to have 120 terabytes (120,000 gigabytes) of data to complete. It also had one explosion scene alone having 6 terabytes (6000 gigabytes).