Original - Zookeeper: ZK for short, which provides MDC with principal selection arbitration. The ZK cluster selects the primary MDC among multiple MDC, and the primary MDC monitors other MDC. When the primary MDC fails, a new primary MDC is generated.
- ZK also contains metadata generated during storage system initialization, including data routing information such as partition-hard disk mapping. A system deploys an odd number of zookeepers to form a cluster. At least three of them are deployed. You must ensure that more than half of the total number of zookeepers are active and accessible.
