What Is a Metadata Controller?

The Meta Data Controller (MDC) is a machine based on each volume (file system) that is responsible for hard mounting and controlling security and distribution information. Only a single machine can be the MDC for a volume, and many machines can mount the same volume from the network, and if SANergy is configured, these machines will have full SAN fast access. Basically, it can be understood that MDC is like a dispatcher. Before the host node needs to access the data, it asks where the data is, but it does not pass it when accessing the data, but directly accesses it by itself.