Videoconference Capacity Leasing on Hybrid Clouds

Abstract

Abstract-This paper proposes a new methodology focused on implementing cost effective architectures on Cloud Computing systems. With this methodology the paper presents some disadvantages of systems that are based on single Cloud architectures and gives some advices for taking into account in the development of hybrid systems. The work also includes a validation of these ideas implemented in a complete videoconference service developed with our research group. This service allows a great number of users per conference, múltiple simultaneous conferences, different client software (requiring transcodiflcation of ¡nidio and video flows) and provides a service like automatic recording. Furthermore it offers different kinds of connectivity including SIP clients and a client based on Web 2.0. The ideas proposed in this article are intended to be a useful resource for any researcher or developer who wants to implement cost effective systems on several Clouds.

A Cost-Effective Methodology Applied to Videoconference Services over Hybrid Clouds

“…This system is a simplified service of the one explained in [3]. From now onwards, we will consider the total storage cost is zero because we use our own datacenter to store the recorded videos.…”

“…Typical videoconferencing scenario (like the one explained in [3]) includes several videoconference clients. Some are connected through a Multipoint Control Unit (MCU) and others participate via Flash or SIP.…”

“…In [3] we decided to compare two topologies: a system in which all resources were allocated in the same public cloud, and another system in which this allocation was made by using a public Cloud and our own datacenter. However this study does not exactly coincide with the current idea of cost calculation because this service is supposed to take advantage of using several public clouds where we have to pay for almost everything.…”

“…We have established five test scenarios based on the architecture explained in [3], all of them including six participants in a videoconference sessions. This architecture is based on Isabel, a videoconference tool which supports sessions with multiple participants, and on Conference Manager, that schedules Isabel videoconference sessions and provides additional services, such as video recording.…”