diff --git a/doc/src/sgml/protocol.sgml b/doc/src/sgml/protocol.sgml
index b93c268167..c09d961d67 100644
--- a/doc/src/sgml/protocol.sgml
+++ b/doc/src/sgml/protocol.sgml
@@ -1473,7 +1473,7 @@ The commands accepted in walsender mode are:
   </varlistentry>
 
   <varlistentry>
-    <term>BASE_BACKUP [<literal>LABEL</literal> <replaceable>'label'</replaceable>] [<literal>PROGRESS</literal>] [<literal>FAST</literal>] [<literal>WAL</literal>]</term>
+    <term>BASE_BACKUP [<literal>LABEL</literal> <replaceable>'label'</replaceable>] [<literal>PROGRESS</literal>] [<literal>FAST</literal>] [<literal>WAL</literal>] [<literal>NOWAIT</literal>]</term>
     <listitem>
      <para>
       Instructs the server to start streaming a base backup.
@@ -1530,6 +1530,19 @@ The commands accepted in walsender mode are:
          </para>
         </listitem>
        </varlistentry>
+
+       <varlistentry>
+        <term><literal>NOWAIT</literal></term>
+        <listitem>
+         <para>
+          By default, the backup will wait until the last required xlog
+          segment has been archived, or emit a warning if log archiving is
+          not enabled. Specifying <literal>NOWAIT</literal> disables both
+          the waiting and the warning, leaving the client responsible for
+          ensuring the required log is available.
+         </para>
+         </listitem>
+       </varlistentry>
       </variablelist>
      </para>
      <para>
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 72a1a158c0..8e9dc7ba92 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -8865,7 +8865,7 @@ pg_stop_backup(PG_FUNCTION_ARGS)
 	XLogRecPtr	stoppoint;
 	char		stopxlogstr[MAXFNAMELEN];
 
-	stoppoint = do_pg_stop_backup(NULL);
+	stoppoint = do_pg_stop_backup(NULL, true);
 
 	snprintf(stopxlogstr, sizeof(stopxlogstr), "%X/%X",
 			 stoppoint.xlogid, stoppoint.xrecoff);
@@ -8880,7 +8880,7 @@ pg_stop_backup(PG_FUNCTION_ARGS)
  * the non-exclusive backup specified by 'labelfile'.
  */
 XLogRecPtr
-do_pg_stop_backup(char *labelfile)
+do_pg_stop_backup(char *labelfile, bool waitforarchive)
 {
 	bool		exclusive = (labelfile == NULL);
 	XLogRecPtr	startpoint;
@@ -9079,7 +9079,7 @@ do_pg_stop_backup(char *labelfile)
 	 * wish to wait, you can set statement_timeout.  Also, some notices are
 	 * issued to clue in anyone who might be doing this interactively.
 	 */
-	if (XLogArchivingActive())
+	if (waitforarchive && XLogArchivingActive())
 	{
 		XLByteToPrevSeg(stoppoint, _logId, _logSeg);
 		XLogFileName(lastxlogfilename, ThisTimeLineID, _logId, _logSeg);
@@ -9120,7 +9120,7 @@ do_pg_stop_backup(char *labelfile)
 		ereport(NOTICE,
 				(errmsg("pg_stop_backup complete, all required WAL segments have been archived")));
 	}
-	else
+	else if (waitforarchive)
 		ereport(NOTICE,
 				(errmsg("WAL archiving is not enabled; you must ensure that all required WAL segments are copied through other means to complete the backup")));
 
diff --git a/src/backend/replication/basebackup.c b/src/backend/replication/basebackup.c
index d94b61f23e..db4cc640e4 100644
--- a/src/backend/replication/basebackup.c
+++ b/src/backend/replication/basebackup.c
@@ -37,6 +37,7 @@ typedef struct
 	const char *label;
 	bool		progress;
 	bool		fastcheckpoint;
+	bool		nowait;
 	bool		includewal;
 }	basebackup_options;
 
@@ -173,7 +174,7 @@ perform_base_backup(basebackup_options *opt, DIR *tblspcdir)
 	}
 	PG_END_ENSURE_ERROR_CLEANUP(base_backup_cleanup, (Datum) 0);
 
-	endptr = do_pg_stop_backup(labelfile);
+	endptr = do_pg_stop_backup(labelfile, !opt->nowait);
 
 	if (opt->includewal)
 	{
@@ -260,6 +261,7 @@ parse_basebackup_options(List *options, basebackup_options *opt)
 	bool		o_label = false;
 	bool		o_progress = false;
 	bool		o_fast = false;
+	bool		o_nowait = false;
 	bool		o_wal = false;
 
 	MemSet(opt, 0, sizeof(*opt));
@@ -294,6 +296,15 @@ parse_basebackup_options(List *options, basebackup_options *opt)
 			opt->fastcheckpoint = true;
 			o_fast = true;
 		}
+		else if (strcmp(defel->defname, "nowait") == 0)
+		{
+			if (o_nowait)
+				ereport(ERROR,
+						(errcode(ERRCODE_SYNTAX_ERROR),
+						 errmsg("duplicate option \"%s\"", defel->defname)));
+			opt->nowait = true;
+			o_nowait = true;
+		}
 		else if (strcmp(defel->defname, "wal") == 0)
 		{
 			if (o_wal)
diff --git a/src/backend/replication/repl_gram.y b/src/backend/replication/repl_gram.y
index e1a4a51a0e..4930ad1d09 100644
--- a/src/backend/replication/repl_gram.y
+++ b/src/backend/replication/repl_gram.y
@@ -71,6 +71,7 @@ Node *replication_parse_result;
 %token K_LABEL
 %token K_PROGRESS
 %token K_FAST
+%token K_NOWAIT
 %token K_WAL
 %token K_START_REPLICATION
 
@@ -107,7 +108,7 @@ identify_system:
 			;
 
 /*
- * BASE_BACKUP [LABEL '<label>'] [PROGRESS] [FAST] [WAL]
+ * BASE_BACKUP [LABEL '<label>'] [PROGRESS] [FAST] [WAL] [NOWAIT]
  */
 base_backup:
 			K_BASE_BACKUP base_backup_opt_list
@@ -142,6 +143,11 @@ base_backup_opt:
 				  $$ = makeDefElem("wal",
 						   (Node *)makeInteger(TRUE));
 				}
+			| K_NOWAIT
+				{
+				  $$ = makeDefElem("nowait",
+						   (Node *)makeInteger(TRUE));
+				}
 			;
 
 /*
diff --git a/src/backend/replication/repl_scanner.l b/src/backend/replication/repl_scanner.l
index 87e77d975a..f5b260119e 100644
--- a/src/backend/replication/repl_scanner.l
+++ b/src/backend/replication/repl_scanner.l
@@ -60,6 +60,7 @@ BASE_BACKUP			{ return K_BASE_BACKUP; }
 FAST			{ return K_FAST; }
 IDENTIFY_SYSTEM		{ return K_IDENTIFY_SYSTEM; }
 LABEL			{ return K_LABEL; }
+NOWAIT			{ return K_NOWAIT; }
 PROGRESS			{ return K_PROGRESS; }
 WAL			{ return K_WAL; }
 START_REPLICATION	{ return K_START_REPLICATION; }
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h
index e7adead9a2..ff73272f75 100644
--- a/src/include/access/xlog.h
+++ b/src/include/access/xlog.h
@@ -318,7 +318,7 @@ extern void WakeupRecovery(void);
  * Starting/stopping a base backup
  */
 extern XLogRecPtr do_pg_start_backup(const char *backupidstr, bool fast, char **labelfile);
-extern XLogRecPtr do_pg_stop_backup(char *labelfile);
+extern XLogRecPtr do_pg_stop_backup(char *labelfile, bool waitforarchive);
 extern void do_pg_abort_backup(void);
 
 /* File path names (all relative to $PGDATA) */