vnetperf 实用程序测量数据库主机的网络性能，以及 TCP 和 UDP 协议的网络延迟和吞吐量。
当心
此实用程序会导致高网络负载，从而降低数据库性能。不要在 Vertica 生产数据库上使用此实用程序。此实用程序有助于识别以下问题：
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所有主机或一个主机的吞吐量低
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所有主机或一个主机的延迟高
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一个或多个主机或子网之间存在瓶颈
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可同时建立的 TCP 连接数限制过低
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网络丢包率高
语法
vnetperf [[options](#Options)] [[tests](#Tests)]
选项
测试
vnetperf 可以指定以下一项或多项测试。如果未指定任何测试，vnetperf 将运行所有测试。将为每个主机打印测试结果。
建议的网络性能
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建议的最大 RTT（往返时间）延迟为 1000 微秒。理想的 RTT 延迟为 200 微秒或更低。Vertica 建议时钟偏差在 1 秒以下。
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建议的最小吞吐量为 100 MB/s。理想的吞吐量为 800 MB/s 或更高。
注意
UDP 吞吐量可以更低；多个网络交换机会对性能产生不利影响。
示例
$ vnetperf latency tcp-throughput
The maximum recommended rtt latency is 2 milliseconds. The ideal rtt latency is 200 microseconds or less. It is recommended that clock skew be kept to under 1 second.
test | date | node | index | rtt latency (us) | clock skew (us)
-------------------------------------------------------------------------------------------------------------------------
latency | 2022-03-29_10:23:55,739 | 10.20.100.247 | 0 | 49 | 3
latency | 2022-03-29_10:23:55,739 | 10.20.100.248 | 1 | 272 | -702
latency | 2022-03-29_10:23:55,739 | 10.20.100.249 | 2 | 245 | 1037
The minimum recommended throughput is 100 MB/s. Ideal throughput is 800 MB/s or more. Note: UDP numbers may be lower, multiple network switches may reduce performance results.
date | test | rate limit (MB/s) | node | MB/s (sent) | MB/s (rec) | bytes (sent) | bytes (rec) | duration (s)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2022-03-29_10:23:55,742 | tcp-throughput | 32 | 10.20.100.247 | 30.579 | 30.579 | 32112640 | 32112640 | 1.00151
2022-03-29_10:23:55,742 | tcp-throughput | 32 | 10.20.100.248 | 30.5791 | 30.5791 | 32112640 | 32112640 | 1.0015
2022-03-29_10:23:55,742 | tcp-throughput | 32 | 10.20.100.249 | 30.5791 | 30.5791 | 32112640 | 32112640 | 1.0015
2022-03-29_10:23:55,742 | tcp-throughput | 32 | average | 30.579 | 30.579 | 32112640 | 32112640 | 1.0015
2022-03-29_10:23:57,749 | tcp-throughput | 64 | 10.20.100.247 | 61.0952 | 61.0952 | 64094208 | 64094208 | 1.00049
2022-03-29_10:23:57,749 | tcp-throughput | 64 | 10.20.100.248 | 61.096 | 61.096 | 64094208 | 64094208 | 1.00048
2022-03-29_10:23:57,749 | tcp-throughput | 64 | 10.20.100.249 | 61.0952 | 61.0952 | 64094208 | 64094208 | 1.00049
2022-03-29_10:23:57,749 | tcp-throughput | 64 | average | 61.0955 | 61.0955 | 64094208 | 64094208 | 1.00048
2022-03-29_10:23:59,753 | tcp-throughput | 128 | 10.20.100.247 | 122.131 | 122.131 | 128122880 | 128122880 | 1.00046
2022-03-29_10:23:59,753 | tcp-throughput | 128 | 10.20.100.248 | 122.132 | 122.132 | 128122880 | 128122880 | 1.00046
2022-03-29_10:23:59,753 | tcp-throughput | 128 | 10.20.100.249 | 122.132 | 122.132 | 128122880 | 128122880 | 1.00046
2022-03-29_10:23:59,753 | tcp-throughput | 128 | average | 122.132 | 122.132 | 128122880 | 128122880 | 1.00046
2022-03-29_10:24:01,757 | tcp-throughput | 256 | 10.20.100.247 | 243.819 | 244.132 | 255754240 | 256081920 | 1.00036
2022-03-29_10:24:01,757 | tcp-throughput | 256 | 10.20.100.248 | 244.125 | 243.282 | 256049152 | 255164416 | 1.00025
2022-03-29_10:24:01,757 | tcp-throughput | 256 | 10.20.100.249 | 244.172 | 243.391 | 256114688 | 255295488 | 1.00032
2022-03-29_10:24:01,757 | tcp-throughput | 256 | average | 244.039 | 243.601 | 255972693 | 255513941 | 1.00031
2022-03-29_10:24:03,761 | tcp-throughput | 512 | 10.20.100.247 | 337.232 | 485.247 | 355893248 | 512098304 | 1.00645
2022-03-29_10:24:03,761 | tcp-throughput | 512 | 10.20.100.248 | 446.16 | 231.001 | 467894272 | 242253824 | 1.00013
2022-03-29_10:24:03,761 | tcp-throughput | 512 | 10.20.100.249 | 349.667 | 409.961 | 368476160 | 432013312 | 1.00497
2022-03-29_10:24:03,761 | tcp-throughput | 512 | average | 377.686 | 375.403 | 397421226 | 395455146 | 1.00385
2022-03-29_10:24:05,772 | tcp-throughput | 640 | 10.20.100.247 | 328.279 | 509.256 | 383975424 | 595656704 | 1.11548
2022-03-29_10:24:05,772 | tcp-throughput | 640 | 10.20.100.248 | 505.626 | 217.217 | 532250624 | 228655104 | 1.00389
2022-03-29_10:24:05,772 | tcp-throughput | 640 | 10.20.100.249 | 390.355 | 474.89 | 410812416 | 499777536 | 1.00365
2022-03-29_10:24:05,772 | tcp-throughput | 640 | average | 408.087 | 400.454 | 442346154 | 441363114 | 1.04101
2022-03-29_10:24:07,892 | tcp-throughput | 768 | 10.20.100.247 | 300.5 | 426.762 | 318734336 | 452657152 | 1.01154
2022-03-29_10:24:07,892 | tcp-throughput | 768 | 10.20.100.248 | 268.252 | 402.891 | 283017216 | 425066496 | 1.00616
2022-03-29_10:24:07,892 | tcp-throughput | 768 | 10.20.100.249 | 510.569 | 243.649 | 535592960 | 255590400 | 1.00042
2022-03-29_10:24:07,892 | tcp-throughput | 768 | average | 359.774 | 357.767 | 379114837 | 377771349 | 1.00604
2022-03-29_10:24:09,911 | tcp-throughput | 1024 | 10.20.100.247 | 304.545 | 444.261 | 334987264 | 488669184 | 1.049
2022-03-29_10:24:09,911 | tcp-throughput | 1024 | 10.20.100.248 | 422.246 | 192.773 | 474284032 | 216530944 | 1.07121
2022-03-29_10:24:09,911 | tcp-throughput | 1024 | 10.20.100.249 | 353.206 | 446.809 | 378732544 | 479100928 | 1.0226
2022-03-29_10:24:09,911 | tcp-throughput | 1024 | average | 359.999 | 361.281 | 396001280 | 394767018 | 1.0476
2022-03-29_10:24:11,988 | tcp-throughput | 2048 | 10.20.100.247 | 343.324 | 414.559 | 387710976 | 468156416 | 1.07697
2022-03-29_10:24:11,988 | tcp-throughput | 2048 | 10.20.100.248 | 292.44 | 246.254 | 308314112 | 259620864 | 1.00544
2022-03-29_10:24:11,988 | tcp-throughput | 2048 | 10.20.100.249 | 437.559 | 405.02 | 459145216 | 425000960 | 1.00072
2022-03-29_10:24:11,988 | tcp-throughput | 2048 | average | 357.774 | 355.278 | 385056768 | 384259413 | 1.02771
JSON results available at: ./results.2022-03-29_10:23:51,548.json