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Q如何降低CPU的使用频率？
AYou can optimize your code and try offload the task to varies hardware accelerators. QorIQ product family offer Data Path Acceleration Architecture (DPAA) to offload network related funtions to the hardware accelerators.
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QSDN和云计算有什么关联？
AIn a software-defined network, a network administrator can shape traffic from a centralized control console without having to touch individual switches. The administrator can change any network switch's rules when necessary -- prioritizing, de-prioritizing or even blocking specific types of packets with a very granular level of control. This is especially helpful in a cloud computing multi-tenant architecture because it allows the administrator to manage traffic loads in a flexible and more efficient manner. Essentially, this allows the administrator to use less expensive, commodity switches and have more control over network traffic flow than ever before.
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QOverlay技术原理是什么？
AThe Overlay technology, like VxLAN, creates a layer 2 network on top of a layer 3 network using encapaulation, increasing the number of entities you can connect up to about 16 million.
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QSDN有医疗方面的应用方案吗？
A There is a good article about using SDN in a hospital. Maybe you can get some ideas from it. The paper is at http://nimbusvault.net/publications/koala/inimpact/papers/imed13-011.pdf.
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QOverlay有什么特点？
AVxLAN is to operate in a multi-vendor environment while SST is to sort our the CPU processing issue and deal with hypervisor-to-hypervisor links. The NVGRE supported by Microsoft and Intel. This protocl does broadly the same thing as VxLAN, using another approach to encapsulation, but it suffers from issues with load balancing.
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Q更多的服务器管理上有什么难点？
AIn very large environment with lots of servers, they probably shall be best served with some sort of centralized management tool like Puppet, cfengine or other tools that you can buy from vendors.
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Q网络虚拟化的发展对智能手机有哪些帮助？
A The perfect storm of growing smartphone usage, increased data demand and continued margin pressure is creating a flawed and unsustainable business model. In the near term, capacity demand has begun to outpace carrier supply, and carriers are searching for solutions on both the revenue and cost sides of their network business model. Many carriers believe SDN is the most cost effective way to do this, and is actively being evaluated around the globe. In the SDN architecture, the control and data planes are decoupled, network intelligence and state are logically centralized, and the underlying network infrastructure is abstracted from the applications. As a result, enterprises and carriers gain unprecedented programmability, automation and network control, enabling them to build highly scalable, flexible networks that readily adapt to changing business needs
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QOverlay有哪些技术特点？
AVxLAN is to operate in a multi-vendor environment while SST is to sort our the CPU processing issue and deal with hypervisor-to-hypervisor links. The NVGRE supported by Microsoft and Intel. This protocl does broadly the same thing as VxLAN, using another approach to encapsulation, but it suffers from issues with load balancing.
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Q网络虚拟化对软硬件结合的产品有哪些帮助？
AFor example, In software testing, network virtualization is a pre-production process for recreating network conditions from the production environment within the test environment. A component of application performance engineering, network virtualization enables connections between applications, services, dependencies and end users to be accurately emulated in the test environment.
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QC29x针对数据中心的应用，有什么特点？
AC29x providesa trust architecture to offload public key management. The environment is secure, high performance, and low total cost of ownership.
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Q如何定制不同的SDN方案呢？
AThere are a lot of things needing to get clear for preparing different SDN projects. 1. What scale of the infrastructure? For 1000 usrs, 10,000 or 100,000 users 2. What is the target or applications? Data center or providing certain services 3. What equipments are needed to meet the target? 4. What management methods shall be used and how many engineer resources are needed?
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Qoverlay那3种技术有什么不同？
AVxLAN is to operate in a multi-vendor environment while SST is to sort our the CPU processing issue and deal with hypervisor-to-hypervisor links. The NVGRE supported by Microsoft and Intel. This protocl does broadly the same thing as VxLAN, using another approach to encapsulation, but it suffers from issues with load balancing.
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Q未来数据中心还有哪些关键技术待突破？
AUntil now, data center infrastructure management (DCIM) has been viewed as a hardware issue, but the challenge today is not with hardware, it’s more about all the data that is managed, monitored and analyzed, so DCIM needs to focus on connectivity between all the systems inside the center Virtualization moves many I/O tasks tuned for hardware to software via the hypervisor. I/O intensive applications, like cryptographic processing applications for SSL, don’t fare well when virtualized because of this translation layer. Outside of the virtual hardware layer, these performance issues can cause application and storage network resources to be depleted at a much faster and often unanticipated pace. Lack of Application Awareness—OS Virtualization doesn’t Solve Application Virtualization. One of the limitations of hypervisor- and kernel-based virtualization solutions are that they only virtualize the operating system. OS virtualization does not virtualize nor is it even aware of applications that are running on the OS.
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Q飞思卡尔应对大计算量的解决方案是什么？
AFreescale QorIQ T-series is our new generation of PowerPC processors for high computing usage. It supports CPU clusters(four cores), dual threads and Altivec units(128-bit vector SIMD engine). Please visit freescale website, http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=T4240, for the details.
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QSDN对软件开发有哪些帮助？
ASDN is enabling new opportunities for developing new applications that can shape how the network functions or is secured for end user applications or mission critical business applications. The ability to innovate within networking is now possible.
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Q飞思卡尔的方案有什么优势？
A Freescale provdes very broad product lines for networking market. Users can easily choose different levels of QorIQ products to meet their requirements. Freescale products own low power consumption, high CPU MIPS and broad interfaces supports, like SRIO, PCIe, Giga bit/Ten giga bit interfaces. Besides, Freescale provides product longevity program. Freescale will make a broad range of devices available for a minimum period of 10 years.
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QOpenFlow对于软件的挑战有哪些解决方案？
AThere are some openflow projects on internet, which might be useful for you. Please check it out, http://yuba.stanford.edu/~casado/of-sw.html.
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Q飞思卡尔对于解决OpenFlow各种挑战有哪些解决方式？
A 1. Performance : Freescale QorIQ series own security engine, pattern match engine and packet acceleration engine to help improve data throughput performance. 2. search table : Freescale QorIQ series have L1 cache, L2 backside cache and L2 coherancy cache to speed up the table search. 3. OF version change : Freescale software development kit provides many ways to update runtime images over different media.
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QSDN对硬件开发有哪些帮助？
ASDN could make hardware design more modulized and standarized. The equipments in SDN could be almost the same type or model. After configured by SDN controller, each equipments(like switches) become what it is assgined to be, like a top-of-rack switch or others.
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Q虚拟化技术面临的挑战是？
AThe trend is move toward virtualization. The benefit out weight the disadvantage. There are two types of virtualization: 1) heterogeneous virtualization 2) homogeneous virtualization. Heterogeneous is very slow because you simulate another architecture. Homogeneous virtualization performances depends on how well your cores/OS switch between virtual machines. In general you want to keep a certain ration between actual core and the number of virtual machines are running.
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