cassandra is a distributed database to center, and each node is a peer, if you need to get the state to get the entire cluster or clusters is said to cassandra monitor or maintain what way can it? General monitoring would probably get get cluster status indicators and other information can, if you want to carry out the operation and maintenance will need to enter some commands or through behavioral let cassandra getting related signal and then execute commands.
Here we introduce divided into two aspects: the command line, a graphic description
Command Line
We know that each node cassandra are equal, so here is provided nodetool command each node can be performed under the following column all nodetool of command and given related to the introduction (version 3.11.4):
assassinate : 强制的将某个节点remove掉，但是不会把节点上的数据进行摆放到移除节点后的新环的数据节点上
bootstrap :
cleanup