iperf 一個測試網絡吞吐的工具

在分布式文件系統開發和測試過程中，我們經常需要測試真實的網絡帶寬，來進行估測分布式系統的傳輸性能，所以我們要對現有的網絡進行測試；Iperf 是一個網絡性能測試工具。IPerf可以測試最大的TCP和UDP帶寬性能。Iperf具有多種參數和特性，可以根據需要調整。IPerf可以報告帶寬。延遲抖動和數據包丟失。下面就對iperf 軟件的功能和用法進行簡單的介紹：

官方網站：

https://iperf.fr/  （iperf 3）

http://sourceforge.net/projects/iperf2 

http://github.com/esnet/iperf 

具體的兩個不同，網站進行了解；

在ubuntu或者fedora 中，可以使用 apt或者yum 來進行搜索安裝;

具體用法：

具體的使用 可以使用 man iperf 命令來進行安裝;

常用測試選項：（iperf2 和 iperf3 稍有不同）

• -i  設置iperf輸出結果的時間間隔
• -m  在結果中顯示TCP的MSS大小
• -u  使用UDP協議
• -M  設置TCP的MSS大小
• -s  以server模式運行
• -c  以client模式運行
• -t  設置iperf測試時間
• -n  設置iperf測試時發送的數據量，與‘-t’參數二選一
• -P  並行運行的線程數，默認為1
• -b  設置測試時的發送帶寬
• -w  TCP協議時設置TCP window的大小，UDP協議時設置接收緩沖大小

測試例子：

root@buaa-3:~# iperf -u -s -p 80 

測試 80端口 udp 接收情況；

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

連接 80端口進行測試 並以1秒為間隔輸出；

iperf 既可以用於網絡帶寬測試也可以用來進行端口測試。更多的使用范例，大家可以在網上查找。這里我只是簡單記錄，用於備忘。

保持更新，轉載請注明出處。cnblogs/xuyaowen 

iperf 參考文獻：https://iperf.fr/iperf-doc.php 

iperf 3 使用說明：

➜  ~ 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-