XuanYang-cn a77dd1034c
Adopt the extended state in DataCoord (#16200)
ChannelWatchInfo with ToWatch, ToRelease will trigger a timer.
ChannelManager now reacts to different ChannelWatch states.

- WatchSuccess > log this info

- WatchFailure/WatchTimeout > ToRelease

- ReleaseSuccess > Delete, reassign if not from DropCollection

- ReleaseFailure/ReleaseTimeout > Cleanup subscription and Delete,
  reassgin if not from DropCollection.

Some Notes:
1. Reassignment will add this channel to buffer if there's only one node.

See also: #15846

Signed-off-by: yangxuan <xuan.yang@zilliz.com>
2022-03-28 22:33:27 +08:00
..
2021-11-16 15:41:11 +08:00

Data Node

DataNode is the component to write insert and delete messages into persistent blob storage, for example MinIO or S3.

Dependency

  • KV store: a kv store that persists messages into blob storage.
  • Message stream: receive messages and publish imformation
  • Root Coordinator: get the latest unique IDs.
  • Data Coordinator: get the flush information and which message stream to subscribe.