ネットワーク帯域幅を測定する2020/01/07 |
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Iperf をインストールしてネットワークの帯域幅を測定します。
送信側と受信側の 2台のマシンが必要です。 |
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| [1] | 計測に使用する 2台双方に [iperf3] をインストールします。 |
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[root@node01 ~]# dnf -y install iperf3
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| [2] | 受信側で以下のようにコマンド実行して待ち受けます。 待ち受けポートを明示的に指定する場合は、以下のコマンドに続けて [-p (ポート番号)] を指定します。 指定しない場合のデフォルトは [5201] です。 Firewalld 稼働中の場合は、待ち受けポートの許可も必要です。 |
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[root@node01 ~]# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- |
| [3] | 送信側から以下のようにコマンド実行して、帯域幅を測定します。 下例では、10秒間で合計 23.8 GBytes を送受信し、平均 20.4 Gbits/sec の速度であったことが分かります。 |
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# iperf3 -c (サーバーのホスト名またはIPアドレス) [root@node02 ~]# iperf3 -c node01.srv.world Connecting to host node01.srv.world, port 5201 [ 5] local 10.0.0.52 port 41282 connected to 10.0.0.51 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 2.39 GBytes 20.5 Gbits/sec 0 2.80 MBytes [ 5] 1.00-2.00 sec 2.43 GBytes 20.9 Gbits/sec 0 2.80 MBytes [ 5] 2.00-3.00 sec 2.40 GBytes 20.6 Gbits/sec 0 2.80 MBytes [ 5] 3.00-4.00 sec 2.39 GBytes 20.5 Gbits/sec 0 2.94 MBytes [ 5] 4.00-5.00 sec 2.35 GBytes 20.2 Gbits/sec 0 3.09 MBytes [ 5] 5.00-6.00 sec 2.35 GBytes 20.2 Gbits/sec 0 3.09 MBytes [ 5] 6.00-7.00 sec 2.38 GBytes 20.4 Gbits/sec 0 3.09 MBytes [ 5] 7.00-8.00 sec 2.37 GBytes 20.4 Gbits/sec 0 3.09 MBytes [ 5] 8.00-9.00 sec 2.37 GBytes 20.3 Gbits/sec 0 3.09 MBytes [ 5] 9.00-10.00 sec 2.38 GBytes 20.4 Gbits/sec 0 3.09 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 23.8 GBytes 20.4 Gbits/sec 0 sender [ 5] 0.00-10.04 sec 23.8 GBytes 20.4 Gbits/sec receiver iperf Done. |
| [4] | その他、オプション指定により様々なテストが実施可能です。 |
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[root@node02 ~]# iperf3 --help
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
-A, --affinity n/n,m set CPU affinity
-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
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)
--fq-rate #[KMG] enable fair-queuing based socket pacing in
bits/sec (Linux only)
-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)
-w, --window #[KMG] set window size / socket buffer size
-C, --congestion <algo> set TCP congestion control algorithm (Linux and FreeBSD only)
-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).
-L, --flowlabel N set the IPv6 flow label (only supported on Linux)
-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
--get-server-output get results from server
--udp-counters-64bit use 64-bit counters in UDP test packets
[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-
iperf3 homepage at: http://software.es.net/iperf/
Report bugs to: https://github.com/esnet/iperf
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