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• 增加 TCP’s 初始拥塞窗口 – 一个大的开始拥塞窗口允许 TCP 传输更多的数据, 显著增强了窗口的增长 – 对于突发的短时连接, 这是一个特别关键的优化.
• Disabling 禁用 TCP Slow-Start After Idle Disabling slow-start after idle will improve performance of long-lived TCP connections, which transfer data in bursts在 Idle 状态之后的慢启动将影响 TCP 长连接的性能, 在突发性传输数据的情况下.
• Enabling Window Scaling (RFC 1323) Enabling window scaling increases the maximum receive window size and allows high-latency connections to achieve better throughput.
• Enabling TCP Low Latency Enabling TCP Low Latency effectively tells the operating system to sacrifice throughput for lower latency. For latency sensitive workloads like Geode, this is an acceptable tradeoff than can improve performance.
• Enabling TCP Fast Open Enabling TCP Fast Open (TFO), allows application data to be sent in the initial SYN packet in certain situations. TFO is a new optimization, which requires support on both clients and servers and may not be available on all operating systems.

容错设计

Another network characteristic that is key to optimal Geode performance is fault tolerance. Geode operations are dependent on network services and network failures can have a significant impact on Geode system operations and performance. While fault tolerant network design is beyond the scope of this paper, there are some important considerations to bear in mind when designing Geode Solutions. For the purposes of this paper, these considerations are organized along the lines of the Cisco Hierarchical Network Design Model as illustrated below.另一个网络特点在于最优的 Geode 性能是容错. Geode 操作依赖于网络服务, 网络故障对于Geode系统操作和性能有比较重要的影响. 而容错网络设计超出了本章所介绍的范围, 当在设计 Geode 解决方案时, 有一些比较重要的考虑. 对于本章的目的, 这些考虑通过网络三层架构设计来体现, 如下图所示:

This model uses a layered approach to network design, representing the network as a set of scalable building blocks, or layers. In designing Geode systems, network fault tolerance considerations include:

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