comnetwork commented on PR #4355:
URL: https://github.com/apache/hbase/pull/4355#issuecomment-1104874108

   @Apache9 ,  `RegionReplicationSink.add`  is  invoked by 
`MultiVersionConcurrencyControl.complete(WriteEntry)`, so it seems not very 
elegant and somewhat tricky to not write WAL but still invoke 
`RegionReplicationSink.add`.
   
   I think we could  add an overload `MemStoreFlusher.requestFlush` to accept 
the `writeFlushRequestWalMarker` paramter,just some modifications for 
{{MemStoreFlusher}}, I think seems it is more suitable than doing some trick to 
not write WAL but still invoke `RegionReplicationSink.add`? 


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