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Laptopiperf -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
