4 environment construction -standalone ha

1 StandAlone HA Operation principle

2 be based on Zookeeper Realization HA

3 test run

5 summary

1 StandAlone HA Principle
be based on Zookeeper Maintain the status , Turn on multiple Master process , One as active , Others as backup
Share , When an active process goes down , Backup Master Take over .
2 Why Zookeeper?
Distributed processes are distributed across multiple servers , Synchronization between states requires coordination , Like who is master, who
yes worker. Who is it master Inform after worker etc. , These require centralized coordinators Zookeeper Come on
Conduct unified state coordination