N
NMGR
A TAC process that is responsible for handling node join and leave events, managing node membership, and controlling CWS/CCC reconfiguration under communication with TBCM.
NMS(Node Membership Service)
A module in TAC that is responsible for managing the information (node ID, IP address, port, and incarnation number) received from TBCM, and the weight which indicates node workload.
NOT NULL
A constraint which forces a column to not have NULL values.
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