因为需要估算集群中的节点数量，所以首先需要知道集群节点之间的IO带宽
# apt install iperf firewalld
# firewall-cmd --state
# systemctl stop firewalld.service(这个是客户端需要)
| 端 | 局域网域名 | 输入的命令 |
| 客户端 | Desktop | |
| 服务端 | Laptop | iperf -s |
Desktop运行结果:
(Python3.6) appleyuchi@Desktop:~$ iperf -c Laptop
------------------------------------------------------------
Client connecting to Laptop, TCP port 5001
TCP window size: 238 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.102 port 42184 connected with 192.168.0.103 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.1 sec 81.2 MBytes 67.8 Mbits/sec
Laptop运行结果:
(Python3.6) appleyuchi@Laptop:~$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 128 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.0.103 port 5001 connected with 192.168.0.102 port 42184
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.2 sec 81.2 MBytes 66.6 Mbits/sec
