HDFS High Availability
YARN High Availability
HBase High Availability
Most aspects of HBase are highly available in a standard configuration. A cluster typically consists of one Master and three or more RegionServers, with data stored in HDFS. To ensure that every component is highly available, configure one or more backup Masters. The backup Masters run on other hosts than the active Master.
Enabling HBase High Availability Using Cloudera Manager
- Go to the HBase service.
- Follow the process for adding a role instance and add a backup Master to a different host than the one on which the active Master is running.
来源：oschina
链接：https://my.oschina.net/freeshow/blog/3169217