iperf 一个测试网络吞吐的工具

在分布式文件系统开发和测试过程中，我们经常需要测试真实的网络带宽，来进行估测分布式系统的传输性能，所以我们要对现有的网络进行测试；Iperf 是一个网络性能测试工具。IPerf可以测试最大的TCP和UDP带宽性能。Iperf具有多种参数和特性，可以根据需要调整。IPerf可以报告带宽。延迟抖动和数据包丢失。下面就对iperf 软件的功能和用法进行简单的介绍：

官方网站：

https://iperf.fr/ （iperf 3）

http://sourceforge.net/projects/iperf2

http://github.com/esnet/iperf

具体的两个不同，网站进行了解；

在ubuntu或者fedora 中，可以使用 apt或者yum 来进行搜索安装;

具体用法：

具体的使用可以使用 man iperf 命令来进行安装;

常用测试选项：（iperf2 和 iperf3 稍有不同）

-i 设置iperf输出结果的时间间隔
-m 在结果中显示TCP的MSS大小
-u 使用UDP协议
-M 设置TCP的MSS大小
-s 以server模式运行
-c 以client模式运行
-t 设置iperf测试时间
-n 设置iperf测试时发送的数据量，与‘-t’参数二选一
-P 并行运行的线程数，默认为1
-b 设置测试时的发送带宽
-w TCP协议时设置TCP window的大小，UDP协议时设置接收缓冲大小

测试例子：

root@buaa-3:~# iperf -u -s -p 80

测试 80端口 udp 接收情况；

[root@docker ~]# iperf -c 192.168.10.14 -u -p 80 -e -i 1

连接 80端口进行测试并以1秒为间隔输出；

iperf 既可以用于网络带宽测试也可以用来进行端口测试。更多的使用范例，大家可以在网上查找。这里我只是简单记录，用于备忘。

保持更新，转载请注明出处。cnblogs/xuyaowen

iperf 参考文献：https://iperf.fr/iperf-doc.php

iperf 3 使用说明：

➜  ~ iperf3 -h
Usage: iperf3 [-s|-c host] [options]
       iperf3 [-h|--help] [-v|--version]

Server or Client:
  -p, --port      #         server port to listen on/connect to
  -f, --format   [kmgtKMGT] format to report: Kbits, Mbits, Gbits, Tbits
  -i, --interval  #         seconds between periodic throughput reports
  -F, --file name           xmit/recv the specified file
  -B, --bind      <host>    bind to the interface associated with the address <host>
  -V, --verbose             more detailed output
  -J, --json                output in JSON format
  --logfile f               send output to a log file
  --forceflush              force flushing output at every interval
  -d, --debug               emit debugging output
  -v, --version             show version information and quit
  -h, --help                show this message and quit
Server specific:
  -s, --server              run in server mode
  -D, --daemon              run the server as a daemon
  -I, --pidfile file        write PID file
  -1, --one-off             handle one client connection then exit
  --rsa-private-key-path    path to the RSA private key used to decrypt
                            authentication credentials
  --authorized-users-path   path to the configuration file containing user
                            credentials
Client specific:
  -c, --client    <host>    run in client mode, connecting to <host>
  -u, --udp                 use UDP rather than TCP
  --connect-timeout #       timeout for control connection setup (ms)
  -b, --bitrate #[KMG][/#]  target bitrate in bits/sec (0 for unlimited)
                            (default 1 Mbit/sec for UDP, unlimited for TCP)
                            (optional slash and packet count for burst mode)
  --pacing-timer #[KMG]     set the timing for pacing, in microseconds (default 1000)
  -t, --time      #         time in seconds to transmit for (default 10 secs)
  -n, --bytes     #[KMG]    number of bytes to transmit (instead of -t)
  -k, --blockcount #[KMG]   number of blocks (packets) to transmit (instead of -t or -n)
  -l, --length    #[KMG]    length of buffer to read or write
                            (default 128 KB for TCP, dynamic or 1460 for UDP)
  --cport         <port>    bind to a specific client port (TCP and UDP, default: ephemeral port)
  -P, --parallel  #         number of parallel client streams to run
  -R, --reverse             run in reverse mode (server sends, client receives)
  --bidir                   run in bidirectional mode.
                            Client and server send and receive data.
  -w, --window    #[KMG]    set window size / socket buffer size
  -M, --set-mss   #         set TCP/SCTP maximum segment size (MTU - 40 bytes)
  -N, --no-delay            set TCP/SCTP no delay, disabling Nagle's Algorithm
  -4, --version4            only use IPv4
  -6, --version6            only use IPv6
  -S, --tos N               set the IP type of service, 0-255.
                            The usual prefixes for octal and hex can be used,
                            i.e. 52, 064 and 0x34 all specify the same value.
  --dscp N or --dscp val    set the IP dscp value, either 0-63 or symbolic.
                            Numeric values can be specified in decimal,
                            octal and hex (see --tos above).
  -Z, --zerocopy            use a 'zero copy' method of sending data
  -O, --omit N              omit the first n seconds
  -T, --title str           prefix every output line with this string
  --extra-data str          data string to include in client and server JSON
  --get-server-output       get results from server
  --udp-counters-64bit      use 64-bit counters in UDP test packets
  --repeating-payload       use repeating pattern in payload, instead of
                            randomized payload (like in iperf2)
  --username                username for authentication
  --rsa-public-key-path     path to the RSA public key used to encrypt
                            authentication credentials

[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-