案例研究：大规模广域网传输中虚拟化XRootD前端性能分析
Case Study: Performance Analysis of a Virtualized XRootD Frontend in Large-Scale WAN Transfers
AI总结：
本文研究了T2_BR_SPRACE存储前端架构在高强度数据传输中的性能，采用异构XRootD虚拟机集群，通过pNFS将数据从dCache后端传输至100Gb/s广域网链路，使用BBR拥塞控制算法和TCP扩展，在峰值条件下实现了51.3Gb/s的总吞吐量。
摘要：
本文详细研究了T2_BR_SPRACE存储前端架构及其在高强度数据传输中的性能表现。该架构由异构的XRootD虚拟机集群组成，包含10Gb/s和40Gb/s链路，通过pNFS将数据从77Gb/s的dCache后端传输至外部100Gb/s广域网链路。我们描述了系统配置，包括BBR拥塞控制算法和TCP扩展的使用。在峰值生产条件下，系统能够维持51.3Gb/s的总吞吐量。对特定数据流到费米实验室（FNAL）的分析显示峰值达到41.5Gb/s，经外部监控工具（CERN）验证。本研究记录了复杂虚拟化架构在真实负载下的性能表现。
英文摘要：
This paper presents a detailed case study of the T2_BR_SPRACE storage frontend architecture and its observed performance in high-intensity data transfers. The architecture is composed of a heterogeneous cluster of XRootD [1] Virtual Machines (VMs) with 10 Gb/s and 40 Gb/s links, which aggregate data from a 77 Gb/s dCache [2] backend via pNFS to an external 100 Gb/s WAN link. We describe the system configuration, including the use of the BBR [3] congestion control algorithm and TCP extensions [4]. Under peak production conditions, we observed the system sustaining an aggregate throughput of 51.3 Gb/s. An analysis of a specific data flow to Fermilab (FNAL) showed peaks of 41.5 Gb/s, validated by external monitoring tools (CERN). This study documents the performance of a complex virtualized architecture under real load.
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