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1. Fix compaction save empty segment bug 2. Fix load empty segment bug 3. Add UT for dmlchannels to 100% Resolves: #12450 Signed-off-by: yangxuan <xuan.yang@zilliz.com>
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.