hycdong commented on a change in pull request #598:
URL: https://github.com/apache/incubator-pegasus/pull/598#discussion_r488413553



##########
File path: src/server/pegasus_write_service_impl.h
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@@ -675,7 +664,7 @@ class pegasus_write_service::impl : public 
dsn::replication::replica_base
         return status.code();
     }
 
-    // The resulted `expire_ts` is -1 if record is expired.
+    /// \returns 0 if success.

Review comment:
       I think the comment of this function should be more detailed, such as 
the expired case, not_found case, these case will also return 0, but in my 
view, they are not simply success.




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