Zhen Ye ba289891c0
enhance: add all ddl message into messages (#44407)
issue: #43897

- add ddl messages proto and add some message utilities.
- support shard/exclusive resource-key-lock.
- add all ddl callbacks future into broadcast registry.

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Signed-off-by: chyezh <chyezh@outlook.com>
2025-09-18 10:08:00 +08:00
..
2025-09-16 16:32:01 +08:00
2023-09-21 09:45:27 +08:00
2023-09-26 17:15:27 +08:00
2021-11-16 15:41:11 +08:00

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.