The application of Nodetool instruction in Cassandra

1. If we are going to reboot Cassandra recommend that you save the data in DB before restarting

Instructions:

./bin/nodetool--h 127.0.0.1 Flush

2. View the operation of each node in a clustered environment:

./bin/nodetool--h 127.0.0.1 Ring

Address DCs Rack Status State Load owns Token
133857208900194687050142871119212531697
192.168.11.185 Datacenter1 Rack1 DownNormal? 91.45% 119317112008803869636148387431580597032
192.168.11.124 datacenter1 rack1 up Normal 55.55 KB 8.55% 133857208900194687050142871119212531697

The above information indicates that the 185 machine has not yet started Cassandra.

---------------------------------------------

Address DCs Rack Status State Load owns Token
133857208900194687050142871119212531697
192.168.11.185 datacenter1 rack1 up Normal 91.45% KB 119317112008803869636148387431580597032
192.168.11.124 datacenter1 rack1 up Normal 55.55 KB 8.55% 133857208900194687050142871119212531697

The above information indicates that the Cassandra with 2 nodes is operating normally.