FD.io社區中國行暨將來網絡技術沙龍·南京站 會議小結

What is FD.io VPP?

1. FD.io VPP（Fast Data Input/Output Vector Packet Processing）is a new network multi-tool.
2. Feature:Fast, Scalable and Determinisic,Extensible and Flexible modular design,Developer friendly.
3. New Directions:Asymmectrical Pipelines. Containers. TCP Acceleration. Accelerators.
4. 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.
   

What the FD.io VPP can do?

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

1. Problem:Higher requirement for high bandwidth, ultra-low latency. The load of core network is further aggravated.
2. case1:MEC Traffic Offloading Locally
   case2:IoT Gateway
3. 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
   

華爲：DMM

1. Background：TCP protocol found as the perfomance killer
2. Requirement：

• 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-

1. DMM Protocol Framework deal a lot of problem so we can concentrate on develop.
2. User Case for DMM

• 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.
  

1. 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.
2. huawei 羅素：支撐管道縱深（使能運營商，不可替代），雲和IT，消費者終端和行業數字化

Intel：Hyperscan

1. 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.
2. 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。
3. Three tools : Hsbench-hyperscan性能測試 Hscheck-版本兼容性 Hscollider-傳統匹配庫兼容性
4. 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.）
   

京東：use DPDK to do LB

新華三：DPDK在NFV中的應用

1. 關注點一：三層解耦，編排，控制，網元，虛擬化層能異廠家對接
2. 關注點二： NFV的轉發性能，低時延，高性能，和硬件轉發相比
3. 優化手段：

• 無鎖隊列
• 大頁表—減小TLBmiss
• 內存零拷貝
• CPU編譯指令優化
• PMD調度模型

1. 限制：只支持用戶態，不提供用戶態協議棧，須要廠家自行開發
2. 優化：轉發性能顯著提高，單核性能能夠翻倍