云主机内网带宽测试记录

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1.测试说明

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iperf的好处是纯粹发包和接收，防止硬盘拖后腿，影响测试结果。对于时延，iperf无能无力。但是iperf能够计算抖动。在iperf测试中需要发送大量的包，因此计算出来的抖动值，就是连续发送时延差值的平均值。
可以测试TCP、UDP和SCTP带宽质量，能够提供网络吞吐率信息，以及震动、丢包率，最大段和最大传输单元大小等统计信息，帮助我们测试网络性能，定位网络瓶颈。其中抖动和丢包率适应于UDP测试，二带宽测试适应于TCP和UDP。

2.iperf3软件下载地址

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各个版本RPM包：https://iperf.fr/iperf-download.php#opensuse

3.安装iperf3内网测试软件

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[root@leoheng source]# rpm -ivh iperf3-3.1.3-1.fc24.x86_64.rpm 
Preparing...                          ################################# [100%]
	package iperf3-3.1.3-1.fc24.x86_64 is already installed
[root@leoheng ~]# iperf3 --version 
iperf 3.1.3
Linux leoheng 3.10.0-862.14.4.el7.x86_64 #1 SMP Wed Sep 26 15:12:11 UTC 2018 x86_64
Optional features available: CPU affinity setting, IPv6 flow label, TCP congestion algorithm setting, sendfile / zerocopy, socket pacing
[root@leoheng ~]#

4.内网测试60s

1.在79这台服务器启动服务

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[root@leoheng ~]# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

2.在77这台服务器，向79服务器发起内网数据传输压测。

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[root@leoheng ~]# iperf3 -c 172.18.192.79  -t 60
Connecting to host 172.18.192.79, port 5201
[  4] local 172.18.192.77 port 38676 connected to 172.18.192.79 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec   128 MBytes  1.07 Gbits/sec  1500   43.8 KBytes       
[  4]   1.00-2.00   sec  58.0 MBytes   487 Mbits/sec  1755   90.5 KBytes       
[  4]   2.00-3.00   sec  69.0 MBytes   579 Mbits/sec  1771    499 KBytes       
[  4]   3.00-4.00   sec  58.5 MBytes   490 Mbits/sec  1564   48.1 KBytes       
[  4]   4.00-5.00   sec  60.7 MBytes   509 Mbits/sec  1638    564 KBytes       
[  4]   5.00-6.00   sec  68.4 MBytes   573 Mbits/sec  1707   41.0 KBytes       
[  4]   6.00-7.00   sec  60.9 MBytes   511 Mbits/sec  1747   52.3 KBytes       
[  4]   7.00-8.00   sec  60.4 MBytes   507 Mbits/sec  1659    539 KBytes       
[  4]   8.00-9.00   sec  62.3 MBytes   523 Mbits/sec  1621   38.2 KBytes       
[  4]   9.00-10.00  sec  66.4 MBytes   557 Mbits/sec  2019    402 KBytes       
[  4]  10.00-11.00  sec  60.2 MBytes   505 Mbits/sec  1537    502 KBytes       
[  4]  11.00-12.00  sec  65.8 MBytes   552 Mbits/sec  1614   5.66 KBytes       
[  4]  12.00-13.00  sec  60.7 MBytes   509 Mbits/sec  1810    144 KBytes       
[  4]  13.00-14.00  sec  55.7 MBytes   467 Mbits/sec  1287   1.41 KBytes       
[  4]  14.00-15.00  sec  71.0 MBytes   596 Mbits/sec  1891    194 KBytes       
[  4]  15.00-16.00  sec  68.2 MBytes   572 Mbits/sec  2123    218 KBytes       
[  4]  16.00-17.00  sec  54.9 MBytes   461 Mbits/sec  1547    206 KBytes       
[  4]  17.00-18.00  sec  66.2 MBytes   556 Mbits/sec  1781    543 KBytes       
[  4]  18.00-19.00  sec  63.1 MBytes   530 Mbits/sec  1881    161 KBytes       
[  4]  19.00-20.00  sec  55.6 MBytes   466 Mbits/sec  1394    550 KBytes       
[  4]  20.00-21.00  sec  69.3 MBytes   581 Mbits/sec  1672    532 KBytes       
[  4]  21.00-22.00  sec  61.5 MBytes   516 Mbits/sec  1575    526 KBytes       
[  4]  22.00-23.00  sec  63.5 MBytes   533 Mbits/sec  1660   29.7 KBytes       
[  4]  23.00-24.00  sec  63.1 MBytes   529 Mbits/sec  1818    154 KBytes       
[  4]  24.00-25.00  sec  56.3 MBytes   472 Mbits/sec  1582   1.41 KBytes       
[  4]  25.00-26.00  sec  71.8 MBytes   603 Mbits/sec  1959   79.2 KBytes       
[  4]  26.00-27.00  sec  55.4 MBytes   465 Mbits/sec  1405    436 KBytes       
[  4]  27.00-28.00  sec  68.6 MBytes   575 Mbits/sec  1428   15.6 KBytes       
[  4]  28.00-29.00  sec  62.8 MBytes   527 Mbits/sec  1578    544 KBytes       
[  4]  29.00-30.00  sec  62.9 MBytes   528 Mbits/sec  1677    556 KBytes       
[  4]  30.00-31.00  sec  62.9 MBytes   528 Mbits/sec  1746    549 KBytes       
[  4]  31.00-32.00  sec  62.6 MBytes   526 Mbits/sec  1679    547 KBytes       
[  4]  32.00-33.00  sec  63.3 MBytes   531 Mbits/sec  1660    553 KBytes       
[  4]  33.00-34.00  sec  67.9 MBytes   569 Mbits/sec  1870    296 KBytes       
[  4]  34.00-35.00  sec  57.3 MBytes   480 Mbits/sec  1462   22.6 KBytes       
[  4]  35.00-36.00  sec  65.8 MBytes   552 Mbits/sec  1732   53.7 KBytes       
[  4]  36.00-37.00  sec  63.3 MBytes   531 Mbits/sec  1684   58.0 KBytes       
[  4]  37.00-38.00  sec  62.9 MBytes   528 Mbits/sec  1933    164 KBytes       
[  4]  38.00-39.00  sec  57.9 MBytes   485 Mbits/sec  1157    618 KBytes       
[  4]  39.00-40.00  sec  68.5 MBytes   574 Mbits/sec  2026   7.07 KBytes       
[  4]  40.00-41.00  sec  59.2 MBytes   496 Mbits/sec  1667    132 KBytes       
[  4]  41.00-42.00  sec  69.0 MBytes   579 Mbits/sec  1770    568 KBytes       
[  4]  42.00-43.00  sec  57.0 MBytes   478 Mbits/sec  1702   35.4 KBytes       
[  4]  43.00-44.00  sec  66.8 MBytes   560 Mbits/sec  1820    494 KBytes       
[  4]  44.00-45.00  sec  61.6 MBytes   517 Mbits/sec  1665    577 KBytes       
[  4]  45.00-46.00  sec  62.8 MBytes   527 Mbits/sec  1710    584 KBytes       
[  4]  46.00-47.00  sec  60.5 MBytes   507 Mbits/sec  1753    564 KBytes       
[  4]  47.00-48.00  sec  68.4 MBytes   574 Mbits/sec  1933    147 KBytes       
[  4]  48.00-49.00  sec  57.8 MBytes   485 Mbits/sec  1282    598 KBytes       
[  4]  49.00-50.00  sec  65.2 MBytes   547 Mbits/sec  1740    554 KBytes       
[  4]  50.00-51.00  sec  62.9 MBytes   528 Mbits/sec  1710    570 KBytes       
[  4]  51.00-52.00  sec  60.9 MBytes   511 Mbits/sec  1732   41.0 KBytes       
[  4]  52.00-53.00  sec  63.4 MBytes   532 Mbits/sec  1783   62.2 KBytes       
[  4]  53.00-54.00  sec  65.3 MBytes   548 Mbits/sec  1776    156 KBytes       
[  4]  54.00-55.00  sec  55.3 MBytes   464 Mbits/sec  1466    211 KBytes       
[  4]  55.00-56.00  sec  69.4 MBytes   582 Mbits/sec  1700   9.90 KBytes       
[  4]  56.00-57.00  sec  61.8 MBytes   518 Mbits/sec  1665    588 KBytes       
[  4]  57.00-58.00  sec  62.8 MBytes   527 Mbits/sec  1747    556 KBytes       
[  4]  58.00-59.00  sec  65.3 MBytes   548 Mbits/sec  1731    560 KBytes       
[  4]  59.00-60.00  sec  59.7 MBytes   500 Mbits/sec  1812    158 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-60.00  sec  3.75 GBytes   536 Mbits/sec  101313             sender
[  4]   0.00-60.00  sec  3.74 GBytes   536 Mbits/sec                  receiver

iperf Done.
[root@leoheng ~]#

5.细节注意点

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防火墙会阻止两台电脑之间的通信。 
 centos7.X自带的防火墙为firewalld删除，再安装iptalbes。 
 在vm1和vm2中输入以下两条的命令:  
 [1]删除firewalld的命令如下 
    sudo systemctl stop firewalld 
    sudo systemctl disable firewalld 
    sudo systemctl stop firewalld.service 
    sudo systemctl disable firewalld.service 
 [2]安装iptables的命令如下  
    sudo yum install -y iptables-services.x86_64 iptables-devel.x86_64 
 重新测试iperf3 
 在vm_1中输入命令:  
    sudo iptables -I INPUT 1 -s vm2_ip -j ACCEPT 
    sudo service iptables save 
    iperf3 -s 
 在vm_2中输入命令:   
    iperf3 -c vm1_ip -t 5

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tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia-plus根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

比别人优秀不重要，重要的是比昨天的自己更优秀。