shaoyue 6322eb31e7
[skip ci] Add comments for exported things in policy.go (#11876)
Signed-off-by: shaoyue.chen <shaoyue.chen@zilliz.com>
2021-11-16 13:21:16 +08:00
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Data Coordinator

Data cooridnator(datacoord for short) is the component to organize DataNodes and segments allocations.

Dependency

  • KV store: a kv store has all the meta info datacoord needs to operate. (etcd)
  • Message stream: a message stream to communicate statistics information with data nodes. (Pulsar)
  • Root Coordinator: timestamp, id and meta source.
  • Data Node(s): could be an instance or a cluster, actual worker group handles data modification operations.