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Data in the cluster module means both timeseries schemas and timeseries data since they are partitioned into multiple DataGroups and not stored globally, so coordinators may be necessary to find the right nodes that should store the corresponding data. As the partition table is the sole data structure that may help coordination, its owner, MetaMember, works as a coordinator in the cluster moduleCoordinator need the help of MetaMember. Fig.5 shows the whole procedure involving cluster data related operations.

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