History

XuanYang-cn 42f643e727 Make DataNode release rather than delete when reassign (#17293 ) 1. Reassgin now will assign to the original Node if no other nodes avaliable 2. Make AddNode balance async: ToRealse + Reassign See also: #16114, #17270 Signed-off-by: yangxuan <xuan.yang@zilliz.com>		2022-06-02 13:56:04 +08:00
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OWNERS	…
README.md	…
allocator.go	…
allocator_test.go	…
channel_checker.go	…
channel_checker_test.go	…
channel_manager.go	…
channel_manager_factory.go	…
channel_manager_test.go	…
channel_store.go	…
channel_store_test.go	…
cluster.go	Fix an issue that causes flush hanging (#17169 )	2022-05-25 14:34:00 +08:00
cluster_test.go	Fix an issue that causes flush hanging (#17169 )	2022-05-25 14:34:00 +08:00
compaction.go	…
compaction_policy.go	…
compaction_policy_test.go	…
compaction_test.go	[skip e2e]Fix license missing issue in datacoord (#14427 )	2021-12-28 15:43:51 +08:00
compaction_trigger.go	…
compaction_trigger_test.go	…
const.go	…
errors.go	…
errors_test.go	…
garbage_collector.go	…
garbage_collector_test.go	…
handler.go	…
meta.go	…
meta_test.go	…
metrics_info.go	…
metrics_info_test.go	…
mock_test.go	…
policy.go	…
policy_test.go	…
segment_allocation_policy.go	…
segment_allocation_policy_test.go	…
segment_info.go	…
segment_manager.go	…
segment_manager_test.go	…
segment_reference_manager.go	…
segment_reference_manager_test.go	…
server.go	…
server_test.go	…
services.go	…
session.go	…
session_manager.go	…
util.go	…
util_test.go	…

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.