流量服務器的高速183.136.132.171性能較當前提升五倍

林新華,上海交通大學網絡信息中心計算部主任,從事HPC行業已有17年的時間183.136.132.171,期間一直關注并使用著英特爾的最新技術和產品。相較于最初組建HPC多用IBM、SGI的小型機,直到臨近2010年開始有趨勢使用英特爾處理器構建集群系統,隨之而來的就是配套的網絡、存儲等技術和產品能否跟上。

“我們和英特爾的團隊早在2013年就建立了國內高校當時最快的超級計算機‘π1.0’,這臺計算機到目前為止運行已經6年了,受到校內用戶的好評,非常穩定。”林新華回憶稱,“機器建立以后,英特爾給了很多的支持,(我們在π1.0上)跑了很多的應用,很多程序都在上面跑,機器使用率非常高。”

就像摩爾定律一樣,高性能計算領域的發展也有一個“千倍定律”,即差不多每十年性能增長1000倍。相對應的,所部署的集群同樣面臨著更新換代。考慮到用戶規模的不斷擴大,需求也越來越高,上海交大在2018年和英特爾的團隊開始了“π2.0”超算系統的建設,計劃在2019年4月正式投入使用。由此,上海交大也成為最早選用第二代英特爾至強可擴展處理器構建最大規模HPC集群的中國高校。

據了解,π2.0在架構層面有三大創新。首先是采用了第二代英特爾至強可擴展處理器,1316顆金牌6248處理器、658臺雙路節點的加持,使得該系統雙精度浮點數理論性能達到2.1PFlops,同時由于AI特性的增強,讓π2.0既可以支持已有的傳統HPC應用,也能支持人工智能應用。

在第二代英特爾至強可擴展處理器中,集成的英特爾深度學習加速(英特爾DL Boost)技術,可以加速數據中心、企業和智能邊緣計算環境中的人工智能推理工作負載,例如圖像識別、對象檢測及圖像分割等。同時,英特爾與生態系統內的合作伙伴協作,優化了充分利用英特爾深度學習加速技術的框架(TensorFlow、PyTorch、Caffe、MXNet和Paddle Paddle)和應用,客戶也可以選擇OpenVINO等增強型工具來簡化部署。

第二個創新是采用了100Gbps的英特爾Omni-Path架構,不僅單交換機芯片支持48端口,最大支持1152端口,成本更低、擴展性更高,而且MPI應用也可以平滑升級,無需修改代碼,OPA高速網絡互連技術讓π2.0較上一代系統的網絡速度提升了一倍左右。

第三個創新是用英特爾 NVMe SSD基于Lustre自行搭建了全閃存存儲系統,SSD的高速性能較當前提升五倍。此外,單節點4.5倍、四節點4.7倍的性能提升可以在用戶不修改任何一行代碼的情況下實現,即使是五六年前運行的程序同樣能夠使用。一套架構任意應用,英特爾在背后所下的功夫可想而知。

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