OpenflowController性能剖析.ppt

OPENFLOW CONTROLLER性能调查 Openflow Controller性能 容纳能力 Flow的Setup rate HP ProCurve 5406zl switch, is 275 flows per second. Setup delay10ms 主要受switch和controller间通讯频率的影响 解决方案： 采用分布式的Controller或将部分管理下放在switch，但是改动较大，商业switch不支持或者实现复杂 Enhancing Responsiveness and Scalability for OpenFlow Networks via Control-Message Quenching 平均往返时间（Mean Round Trip Time） NOX 1个switch，200ms 30个switch，6s 80个swich，8s A Flexible OpenFlow-Controller Benchmark 发送和响应速率（Send- and Response Rates） Nox接收packets能力 每个switch10000pps 70个switch70000pps Nox发送packet能力 10000pps A Flexible OpenFlow-Controller Benchmark Controller Throughput 最大吞吐量（右图上） Relation with the number of active switches：原则上影响不大，但交换机数量超过一定阈值会造成吞吐量下降 IO处理overhand增加 任务队列或其他共享资源紧张 IO和批处理效率降低 Average maximum throughput achieved with different number of threads. Average maximum throughput with different number of switches. On Controller Performance in Software-Defined Networks Controller Throughput 最大吞吐量 Relation with the load level影响不大 Effect of write-intensive workload Average maximum throughput with different number of threads and limits on the maximum overall number of requests on the fly Average maximum throughput for various levels of write-intensive workloads with 32 switches and 4 threads NOX-MT On Controller Performance in Software-Defined Networks Controller Response Time Minimum response time 100-150us Maximum response time NOX-MT 8核2GHz的CPU，每秒能处理1.6million请求，评价应答时间为2ms Worst-case average response time and standard deviation (milliseconds) for various number of threads with 32 switches and unlimited number of outstanding flow setup requests. On Controller Performance in Software-Defined Networks Controller Response Time 应答时间 Relation with the load level 线程一定，Load与应答时间成正比 Load一定，线程多，应答时间短 Response time CDF for various maximum number of requests on the fly with 32 switches, and four threads On Controller Performance in Software-Defined Networks Controller Response Time 应答时间 Relation with the number of active switches Load一定，线程