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[skip ci] Fix grammar (#12997) 

Signed-off-by: sida shen <sida.shen@zilliz.com>
pull/13012/head
SS 2021-12-08 20:21:29 +08:00 committed by GitHub
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docs/design_docs/datanode_recovery_design_0513_2021.md
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@ -40,8 +40,8 @@ After DataNode subscribes to a stateful vchannel, DataNode starts to work, or mo
Vchannel is stateful because we don't want to process twice what's already processed, as a "processed" message means its
already persistent. In DataNode's terminology, a message is processed if it's been flushed.
DataCoord tells DataNode stateful vchannel info through RPC `WatchDmChannels`, so that DataNode won't process
the same messages over and over again. So flowgraph needs ability to consume messages in the middle of a vchannel.
DataCoord tells DataNode stateful vchannel info through RPC `WatchDmChannels` so that DataNode won't process
the same messages over and over again. So flowgraph needs the ability to consume messages in the middle of a vchannel.
DataNode tells DataCoord vchannel states after each flush through RPC `SaveBinlogPaths`, so that DataCoord
keeps the vchannel states update.