Although there are many cloud drive APIs and applications (clients mostly) today, they are not optimized for group activities in cloud-based classrooms. Specifically, such APIs are weak in face of real-time interactivity and large data bulks. YALMS is a newly developed open source educational package which in this presentation is augmented with a group drive functionality. This paper poses the optimization problem involved in a group drive in clouds and presents implementations of both server and client sides of the respective API.
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