Cloud Media Processing - Embedded Community - Intel

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Availability and Reliability Representing the gold standard for reliability, carriergrade equipment is known for “five-nines” availability, which is often bolstered by robust failover. Cloud-based infrastructure supporting telecom services should integrate the hardware and software components capable of maintaining equivalent availability. Radisys Solution: Radisys Software Media Server, running on the carrier-grade Red Hat Linux operating system, can be deployed on a commercial-off-the-shelf (COTS) Linux appliance or blade servers, as well as AdvancedTCA-based computers delivering five-nines availability such as Radisys ATCA Compute Processing Modules based on Intel ® multi-core architecture. Resource Allocation As mentioned earlier, on-demand provisioning is a key tenet of cloud computing, which requires an infrastructure resource manager capable of adding burst capacity, when needed. Resource managers may also be called upon to route workloads to certain nodes, perform load balancing and manage a cluster of resources. These tasks must be carried out with the understanding that some computing resources may perform specific media services, like text to speech, pure transcoding or multi-media processing. Some scenarios that resource allocation should comprehend include: • Resource Management—Customers pay for what they need per service level agreement; and accordingly, the resource manager assigns servers and balances the load among all the resources. For example, a customer requests six servers total, where five are dedicated to media services and one to transcoding. • Burst Capacity—As an example, audio conferencing has a peak time, typically during work hours. After that time, a customer chooses to release the cloud resources to lower cost or to enable other services to reuse the same cloud infrastructure. • Geographic Resource Management—Services and features are tailored to individual geographies, making it necessary to manage dissimilar installations. • Server Redundancy—In the event of server failure, the cloud maintains a redundant server for failover to minimize disruption. Cloud Media Processing | Radisys White Paper Media Servers in the Cloud: Hardware-based and Software-based Cloud service providers offering media processing services have the option of deploying hardware- or software-based media servers, or a combination. For example, Radisys offers both types of media servers designed for real-time media processing performance. • MPX-12000 ˸ Broadband Media Resource Function (MRF) ˸ Voice and video over LTE (VoLTE) ˸ ATCA-based system can integrate load balancing blades • CMS-9000 ˸ High density, faulttolerant and NEBS compliant ˸ Scalable up to 22,800 ports • Radisys Software Media Servers ˸ Runs on COTS Linux servers based on Intel ® multi-core processors, including the Intel ® Xeon ® processor E5 family ˸ Patented design to maximize real-time performance under high system load ˸ Utilizes Intel ® Integrated Performance Primitives (Intel ® IPP)—an extensive library of multi-core-ready, highly optimized software functions for multimedia and communications applications ˸ Ongoing optimization for virtualized environments 6
Radisys Solution: Radisys continues to improve our unique application programming interface (API) that allows cloud providers to monitor media server resource utilization (e.g., how many resources are still available) in real-time, thus greatly facilitating load balancing. Radisys also exposes measurements and statistics for any running instance. As a result, Radisys media servers are easy to manage on a per instance basis or cluster basis in the cloud. Media Processing in Virtual Machines When implementing software-based media servers, virtualization (see sidebar: Virtualization Technology) gives service providers far more flexibility to add/ remove services and features on the fly. This is because the software providing services/features run in virtual machines that can be deployed/undeployed while the server is running. This capability can be used to satisfy the abstraction and scaling tenets of cloud computing described earlier. However, caution is needed when using virtualization since it can slow down systems, as well as introduce unpredictable behavior that negatively impacts real-time performance, especially under high load. Radisys Solution: Radisys Software Media Server has been successfully tuned and tested on VMware, running on an Intel ® multi-core server. Radisys customers have also reported virtualized operation on Linux KVM. Radisys Software Media server will soon be properly productized and supported on these and other virtualization products in the future. Using virtualization, service providers can easily deploy multiple instances of the Radisys Software Media Server to increase media processing capacity. Another usage is to enhance reliability by creating a backup copy that is a hot standby media server in a virtual machine. Media, Control and Access Security Storing company information in the cloud can be risky, therefore incorporating encryption and authentication technology is critical, particularly for public clouds. Radisys Solution: Radisys implements standard security protocols to protect IP flows. Cloud Media Processing | Radisys White Paper Virtualization Technology Virtualization is commonly discussed in the context of cloud computing. The technology has been around for many years, most notably used in data centers where various applications are consolidated onto a single server. Virtualization software, called a hypervisor, abstracts a computer’s resources (CPU, memory, I/O, etc.) and creates virtual machines that act like independent computers with an operating system, memory, disk and an application. VMware and Linux KVM are examples of hypervisors, also called virtual machine monitors. Of concern to telecom application developers is the overhead introduced by hypervisors, particularly when the computer switches between virtual machines. This delay can diminish deterministic, real-time performance and lead to unexpected behavior. As a result, developers should take steps to ensure their software can run in a virtualized environment without perceptible performance degradation. This includes thorough end-to-end service testing—especially when the cloud media processing and associated cloud network infrastructure is under high system load. Therefore, telecom service providers should weigh the potential impact, both cost and performance, of a virtualized cloud infrastructure. There may be one option where a server instance runs un-virtualized on its own dedicated Intel ® computing platform, and another, where many virtual server instances run on the same physical machine. • Media Plane—The Secure Real-time Transport Protocol (SRTP) supports encryption and message authentication. Note: SRTP is an adaptation of the Real-time Transport Protocol (RTP). • Control Plane—Internet Protocol Security (IPsec) and Transport Layer Security (TLS) secure IP communications by authenticating and encrypting packets. • Operations and Management—Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems. 6 Radisys is implementing the HTTP combined with TLS, called HTTPS, in the future. 7
Page 1 and 2: Overview White Paper | May 2012 Clo
Page 3 and 4: What is a Real-time Service? Cloud
Page 5: Overcoming Challenges Around MPaaS
Page 9 and 10: Radisys Solution: Radisys media pro
Page 11 and 12: To better serve cloud computing cus
Page 13 and 14: PSTN Phone 2G Cellular Laptop with

Cloud Media Processing - Embedded Community - Intel

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