morningman commented on a change in pull request #3878:
URL: https://github.com/apache/incubator-doris/pull/3878#discussion_r443314176



##########
File path: be/src/exec/broker_reader.cpp
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@@ -155,6 +155,8 @@ Status BrokerReader::readat(int64_t position, int64_t 
nbytes, int64_t* bytes_rea
             return status;
         }
 
+        LOG(DEBUG) << "send readat request to broker:" << broker_addr << " 
position:" << position << ", read bytes length:" << nbytes;

Review comment:
       > what is "readat ?"
   
   Like `pread`




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