FD.io社区中国行暨未来网络技术沙龙·南京站会议小结

What is FD.io VPP?

FD.io VPP（Fast Data Input/Output Vector Packet Processing）is a new network multi-tool.
Feature:Fast, Scalable and Determinisic,Extensible and Flexible modular design,Developer friendly.
New Directions:Asymmectrical Pipelines. Containers. TCP Acceleration. Accelerators.
Summary:FD.io VPP is a multi-vendor packet processing technologies that is leading the network transformation. FD.io VPP is a fast and easy-to-use tools.

中兴：Build the network infrastructure for MEC(multi-access edge computing) and IOT(物联网), based on FD.io /VPP

Problem:Higher requirement for high bandwidth, ultra-low latency. The load of core network is further aggravated.
case1:MEC Traffic Offloading Locally
case2:IoT Gateway
Contributions for VPP:ARP module,IP fragment packet pseudo reassembly improvement
NAT ip fragment & icmp fragment packet pseudo reassembly support
LB static scheduling algorithm (rr,wrr,hash)supplement;LB service health check support

Kernel space or User space?
Apps have different flavours?
hardware is not all the same
DMM Protocol Framework: Dual mode, Multiple protocols & Multiple instances, aim to provide a new solution of diverse protocol stacks for developers.-Support Kernel Space and User Space-Simplify new protocol adoptions and Integrations-Enable “protocol routing” in Cloud Networking-

Traditional TCP has limited bandwidth usage in the WAN, because:
TCP Congestion Control will limit delivery rate
Packet Loss and Resend will decrease throughput.
Optimized TCP stack in DMM can achieve 90% bandwidth usage and low latency, easy to deploy
Optimized TCP stack in DMM can support mass concurrent connections and achieve smooth user experience even 12% packet loss rate.

Stack developers can concentrate on user space protocol innovations;
Apps can dynamically choose different protocols.
Support both kernel TCP/IP stack and user space stack；
Container network will easily build E2E communication capacities.
huawei 罗素：支撑管道纵深（使能运营商，不可替代），云和IT，消费者终端和行业数字化

Hyperscan is a regular expression matching library。Regular expression is used to do string operation, or to search and replace some pattern. Hyperscan is used to optimize performance.
Dimensions of Performance Optimize:Sreaming and non-streaming performance.
Small writes.
High match rates.
Scaling to multiple cores/threads.(linear).
Pattern compile time (<1s or <10s)
Optimize size。
Three tools : Hsbench-hyperscan性能测试 Hscheck-版本兼容性 Hscollider-传统匹配库兼容性
Summary:Solid and mature. Delivers substantial speedups to open source IPS/IDS systems.
（An Optimization can have many dimensions，and can bring some tools to be better used.）