On 8/1/17 13:33, Andres Freund wrote:
> On 2017-07-31 21:13:48 +0000, sabrina.iq...@target.com wrote:
>> The following documentation comment has been logged on the website:
>>
>> Page: https://www.postgresql.org/docs/9.6/static/release-9-6.html
>> Description:
>>
>> Wondering why PostgreSQL still uses the terms master and slave when there
>> are other terms like primary/secondary that can be used in the same manner. 
> 
> Yea, I think we should be more careful from now on. I think several
> people already try, but it's not been a concerted effort so far.

Here is a patch to remove remaining uses of "slave" in replication contexts.

Remaining uses are in the Tcl API, which we can't do anything about, and
in a plpgsql test, where it is used for foreign key relationships.  (I'm
not sure what the use in the dblink test that I patched was meant for,
so I just removed it.)  Old release notes are not touched.

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
From 5cec779d62c9a4e3cf8ff6c5d7a825301ca03ada Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <pete...@gmx.net>
Date: Mon, 7 Aug 2017 17:42:47 -0400
Subject: [PATCH] Remove uses of "slave" in replication contexts

This affects mostly code comments, some documentation, and tests.
Official APIs already used "standby".
---
 contrib/dblink/expected/dblink.out            |  6 +-
 contrib/dblink/sql/dblink.sql                 |  6 +-
 doc/src/sgml/high-availability.sgml           |  2 +-
 doc/src/sgml/ref/pgupgrade.sgml               |  4 +-
 src/backend/access/transam/commit_ts.c        |  2 +-
 src/backend/access/transam/multixact.c        |  2 +-
 src/backend/access/transam/varsup.c           |  4 +-
 src/backend/catalog/namespace.c               |  4 +-
 src/backend/commands/variable.c               |  4 +-
 src/backend/executor/execMain.c               |  4 +-
 src/backend/replication/walsender.c           |  2 +-
 src/backend/storage/ipc/procarray.c           |  2 +-
 src/backend/tcop/utility.c                    |  2 +-
 src/bin/pg_dump/pg_dump.c                     |  2 +-
 src/bin/pg_rewind/RewindTest.pm               |  2 +-
 src/test/modules/commit_ts/t/002_standby.pl   |  4 +-
 src/test/modules/commit_ts/t/003_standby_2.pl |  2 +-
 src/test/recovery/t/002_archiving.pl          |  2 +-
 src/test/recovery/t/005_replay_delay.pl       |  2 +-
 src/test/recovery/t/009_twophase.pl           | 86 +++++++++++++--------------
 src/test/recovery/t/012_subtransactions.pl    | 62 +++++++++----------
 21 files changed, 103 insertions(+), 103 deletions(-)

diff --git a/contrib/dblink/expected/dblink.out 
b/contrib/dblink/expected/dblink.out
index 4b6d26e574..511691e57f 100644
--- a/contrib/dblink/expected/dblink.out
+++ b/contrib/dblink/expected/dblink.out
@@ -270,7 +270,7 @@ SELECT *
 FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
 WHERE t.a > 7;
 ERROR:  connection not available
--- put more data into our slave table, first using arbitrary connection syntax
+-- put more data into our table, first using arbitrary connection syntax
 -- but truncate the actual return value so we can use diff to check for success
 SELECT substr(dblink_exec(connection_parameters(),'INSERT INTO foo 
VALUES(10,''k'',''{"a10","b10","c10"}'')'),1,6);
  substr 
@@ -285,7 +285,7 @@ SELECT dblink_connect(connection_parameters());
  OK
 (1 row)
 
--- put more data into our slave table, using persistent connection syntax
+-- put more data into our table, using persistent connection syntax
 -- but truncate the actual return value so we can use diff to check for success
 SELECT substr(dblink_exec('INSERT INTO foo 
VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
  substr 
@@ -610,7 +610,7 @@ SELECT dblink_connect('myconn',connection_parameters());
  OK
 (1 row)
 
--- put more data into our slave table, using named persistent connection syntax
+-- put more data into our table, using named persistent connection syntax
 -- but truncate the actual return value so we can use diff to check for success
 SELECT substr(dblink_exec('myconn','INSERT INTO foo 
VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
  substr 
diff --git a/contrib/dblink/sql/dblink.sql b/contrib/dblink/sql/dblink.sql
index 681cf6a6e8..b093fa6722 100644
--- a/contrib/dblink/sql/dblink.sql
+++ b/contrib/dblink/sql/dblink.sql
@@ -160,14 +160,14 @@ CREATE FUNCTION connection_parameters() RETURNS text 
LANGUAGE SQL AS $f$
 FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
 WHERE t.a > 7;
 
--- put more data into our slave table, first using arbitrary connection syntax
+-- put more data into our table, first using arbitrary connection syntax
 -- but truncate the actual return value so we can use diff to check for success
 SELECT substr(dblink_exec(connection_parameters(),'INSERT INTO foo 
VALUES(10,''k'',''{"a10","b10","c10"}'')'),1,6);
 
 -- create a persistent connection
 SELECT dblink_connect(connection_parameters());
 
--- put more data into our slave table, using persistent connection syntax
+-- put more data into our table, using persistent connection syntax
 -- but truncate the actual return value so we can use diff to check for success
 SELECT substr(dblink_exec('INSERT INTO foo 
VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
 
@@ -316,7 +316,7 @@ CREATE FUNCTION connection_parameters() RETURNS text 
LANGUAGE SQL AS $f$
 -- create a named persistent connection
 SELECT dblink_connect('myconn',connection_parameters());
 
--- put more data into our slave table, using named persistent connection syntax
+-- put more data into our table, using named persistent connection syntax
 -- but truncate the actual return value so we can use diff to check for success
 SELECT substr(dblink_exec('myconn','INSERT INTO foo 
VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
 
diff --git a/doc/src/sgml/high-availability.sgml 
b/doc/src/sgml/high-availability.sgml
index 138bdf2a75..a4494a3494 100644
--- a/doc/src/sgml/high-availability.sgml
+++ b/doc/src/sgml/high-availability.sgml
@@ -40,7 +40,7 @@ <title>High Availability, Load Balancing, and 
Replication</title>
   server to modify the data.  Servers that can modify data are
   called read/write, <firstterm>master</> or <firstterm>primary</> servers.
   Servers that track changes in the master are called <firstterm>standby</>
-  or <firstterm>slave</> servers. A standby server that cannot be connected
+  or <firstterm>secondary</> servers. A standby server that cannot be connected
   to until it is promoted to a master server is called a <firstterm>warm
   standby</> server, and one that can accept connections and serves read-only
   queries is called a <firstterm>hot standby</> server.
diff --git a/doc/src/sgml/ref/pgupgrade.sgml b/doc/src/sgml/ref/pgupgrade.sgml
index ac7ec9f23c..d44431803b 100644
--- a/doc/src/sgml/ref/pgupgrade.sgml
+++ b/doc/src/sgml/ref/pgupgrade.sgml
@@ -483,7 +483,7 @@ <title>Run <application>rsync</></title>
 
       <para>
        From a directory that is above the old and new database cluster
-       directories, run this for each slave:
+       directories, run this for each standby:
 
 <programlisting>
 rsync --archive --delete --hard-links --size-only old_pgdata new_pgdata 
remote_dir
@@ -517,7 +517,7 @@ <title>Configure streaming replication and log-shipping 
standby servers</title>
       <para>
        Configure the servers for log shipping.  (You do not need to run
        <function>pg_start_backup()</> and <function>pg_stop_backup()</>
-       or take a file system backup as the slaves are still synchronized
+       or take a file system backup as the standbys are still synchronized
        with the master.)
       </para>
      </step>
diff --git a/src/backend/access/transam/commit_ts.c 
b/src/backend/access/transam/commit_ts.c
index 827d976db8..60fb9eeb06 100644
--- a/src/backend/access/transam/commit_ts.c
+++ b/src/backend/access/transam/commit_ts.c
@@ -621,7 +621,7 @@ CommitTsParameterChange(bool newvalue, bool oldvalue)
  *
  * The reason why this SLRU needs separate activation/deactivation functions is
  * that it can be enabled/disabled during start and the activation/deactivation
- * on master is propagated to slave via replay. Other SLRUs don't have this
+ * on master is propagated to standby via replay. Other SLRUs don't have this
  * property and they can be just initialized during normal startup.
  *
  * This is in charge of creating the currently active segment, if it's not
diff --git a/src/backend/access/transam/multixact.c 
b/src/backend/access/transam/multixact.c
index 682eef420b..7142ecede0 100644
--- a/src/backend/access/transam/multixact.c
+++ b/src/backend/access/transam/multixact.c
@@ -939,7 +939,7 @@ GetNewMultiXactId(int nmembers, MultiXactOffset *offset)
 
        debug_elog3(DEBUG2, "GetNew: for %d xids", nmembers);
 
-       /* safety check, we should never get this far in a HS slave */
+       /* safety check, we should never get this far in a HS standby */
        if (RecoveryInProgress())
                elog(ERROR, "cannot assign MultiXactIds during recovery");
 
diff --git a/src/backend/access/transam/varsup.c 
b/src/backend/access/transam/varsup.c
index 15e05591b7..702c8c957f 100644
--- a/src/backend/access/transam/varsup.c
+++ b/src/backend/access/transam/varsup.c
@@ -67,7 +67,7 @@ GetNewTransactionId(bool isSubXact)
                return BootstrapTransactionId;
        }
 
-       /* safety check, we should never get this far in a HS slave */
+       /* safety check, we should never get this far in a HS standby */
        if (RecoveryInProgress())
                elog(ERROR, "cannot assign TransactionIds during recovery");
 
@@ -468,7 +468,7 @@ GetNewObjectId(void)
 {
        Oid                     result;
 
-       /* safety check, we should never get this far in a HS slave */
+       /* safety check, we should never get this far in a HS standby */
        if (RecoveryInProgress())
                elog(ERROR, "cannot assign OIDs during recovery");
 
diff --git a/src/backend/catalog/namespace.c b/src/backend/catalog/namespace.c
index 029a132bb4..6859a97363 100644
--- a/src/backend/catalog/namespace.c
+++ b/src/backend/catalog/namespace.c
@@ -3802,10 +3802,10 @@ InitTempTableNamespace(void)
                                                
get_database_name(MyDatabaseId))));
 
        /*
-        * Do not allow a Hot Standby slave session to make temp tables.  Aside
+        * Do not allow a Hot Standby session to make temp tables.  Aside
         * from problems with modifying the system catalogs, there is a naming
         * conflict: pg_temp_N belongs to the session with BackendId N on the
-        * master, not to a slave session with the same BackendId.  We should 
not
+        * master, not to a hot standby session with the same BackendId.  We 
should not
         * be able to get here anyway due to XactReadOnly checks, but let's just
         * make real sure.  Note that this also backstops various operations 
that
         * allow XactReadOnly transactions to modify temp tables; they'd need
diff --git a/src/backend/commands/variable.c b/src/backend/commands/variable.c
index 4156bcd8df..3ed1c56e82 100644
--- a/src/backend/commands/variable.c
+++ b/src/backend/commands/variable.c
@@ -472,8 +472,8 @@ show_log_timezone(void)
  * We allow idempotent changes (r/w -> r/w and r/o -> r/o) at any time, and
  * we also always allow changes from read-write to read-only.  However,
  * read-only may be changed to read-write only when in a top-level transaction
- * that has not yet taken an initial snapshot.  Can't do it in a hot standby
- * slave, either.
+ * that has not yet taken an initial snapshot.  Can't do it in a hot standby,
+ * either.
  *
  * If we are not in a transaction at all, just allow the change; it means
  * nothing since XactReadOnly will be reset by the next StartTransaction().
diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c
index c11aa4fe21..6671a25ffb 100644
--- a/src/backend/executor/execMain.c
+++ b/src/backend/executor/execMain.c
@@ -759,8 +759,8 @@ ExecCheckRTEPermsModified(Oid relOid, Oid userid, Bitmapset 
*modifiedCols,
  * unless we're in parallel mode, in which case don't even allow writes
  * to temp tables.
  *
- * Note: in a Hot Standby slave this would need to reject writes to temp
- * tables just as we do in parallel mode; but an HS slave can't have created
+ * Note: in a Hot Standby this would need to reject writes to temp
+ * tables just as we do in parallel mode; but an HS standby can't have created
  * any temp tables in the first place, so no need to check that.
  */
 static void
diff --git a/src/backend/replication/walsender.c 
b/src/backend/replication/walsender.c
index 9a2babef1e..03e1cf44de 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -2572,7 +2572,7 @@ XLogSendPhysical(void)
                 * fsync'd to disk.  We cannot go further than what's been 
written out
                 * given the current implementation of XLogRead().  And in any 
case
                 * it's unsafe to send WAL that is not securely down to disk on 
the
-                * master: if the master subsequently crashes and restarts, 
slaves
+                * master: if the master subsequently crashes and restarts, 
standbys
                 * must not have applied any WAL that got lost on the master.
                 */
                SendRqstPtr = GetFlushRecPtr();
diff --git a/src/backend/storage/ipc/procarray.c 
b/src/backend/storage/ipc/procarray.c
index a7e8cf2d43..eab218e316 100644
--- a/src/backend/storage/ipc/procarray.c
+++ b/src/backend/storage/ipc/procarray.c
@@ -1408,7 +1408,7 @@ GetOldestXmin(Relation rel, int flags)
                 * being careful not to generate a "permanent" XID.
                 *
                 * vacuum_defer_cleanup_age provides some additional "slop" for 
the
-                * benefit of hot standby queries on slave servers.  This is 
quick and
+                * benefit of hot standby queries on standby servers.  This is 
quick and
                 * dirty, and perhaps not all that useful unless the master has 
a
                 * predictable transaction rate, but it offers some protection 
when
                 * there's no walsender connection.  Note that we are assuming
diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c
index ddacac8774..775477c6cf 100644
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -264,7 +264,7 @@ PreventCommandIfParallelMode(const char *cmdname)
 /*
  * PreventCommandDuringRecovery: throw error if RecoveryInProgress
  *
- * The majority of operations that are unsafe in a Hot Standby slave
+ * The majority of operations that are unsafe in a Hot Standby
  * will be rejected by XactReadOnly tests.  However there are a few
  * commands that are allowed in "read-only" xacts but cannot be allowed
  * in Hot Standby mode.  Those commands should call this function.
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 393b9e25a9..37cb7cd986 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -676,7 +676,7 @@ main(int argc, char **argv)
                dopt.no_security_labels = 1;
 
        /*
-        * On hot standby slaves, never try to dump unlogged table data, since 
it
+        * On hot standbys, never try to dump unlogged table data, since it
         * will just throw an error.
         */
        if (fout->isStandby)
diff --git a/src/bin/pg_rewind/RewindTest.pm b/src/bin/pg_rewind/RewindTest.pm
index 39a559e259..6649c22b4f 100644
--- a/src/bin/pg_rewind/RewindTest.pm
+++ b/src/bin/pg_rewind/RewindTest.pm
@@ -160,7 +160,7 @@ sub promote_standby
        $node_master->poll_query_until('postgres', $wal_received_query)
          or die "Timed out while waiting for standby to receive and write WAL";
 
-       # Now promote slave and insert some new data on master, this will put
+       # Now promote standby and insert some new data on master, this will put
        # the master out-of-sync with the standby.
        $node_standby->promote;
 
diff --git a/src/test/modules/commit_ts/t/002_standby.pl 
b/src/test/modules/commit_ts/t/002_standby.pl
index 1437519aa1..83e851954b 100644
--- a/src/test/modules/commit_ts/t/002_standby.pl
+++ b/src/test/modules/commit_ts/t/002_standby.pl
@@ -34,7 +34,7 @@
   $master->safe_psql('postgres', 'select pg_current_wal_lsn()');
 $standby->poll_query_until('postgres',
        qq{SELECT '$master_lsn'::pg_lsn <= pg_last_wal_replay_lsn()})
-  or die "slave never caught up";
+  or die "standby never caught up";
 
 my $standby_ts = $standby->safe_psql('postgres',
 qq{select ts.* from pg_class, pg_xact_commit_timestamp(xmin) ts where relname 
= 't10'}
@@ -47,7 +47,7 @@
 $master_lsn = $master->safe_psql('postgres', 'select pg_current_wal_lsn()');
 $standby->poll_query_until('postgres',
        qq{SELECT '$master_lsn'::pg_lsn <= pg_last_wal_replay_lsn()})
-  or die "slave never caught up";
+  or die "standby never caught up";
 $standby->safe_psql('postgres', 'checkpoint');
 
 # This one should raise an error now
diff --git a/src/test/modules/commit_ts/t/003_standby_2.pl 
b/src/test/modules/commit_ts/t/003_standby_2.pl
index c3000f5b4c..27494709e1 100644
--- a/src/test/modules/commit_ts/t/003_standby_2.pl
+++ b/src/test/modules/commit_ts/t/003_standby_2.pl
@@ -33,7 +33,7 @@
   $master->safe_psql('postgres', 'select pg_current_wal_lsn()');
 $standby->poll_query_until('postgres',
        qq{SELECT '$master_lsn'::pg_lsn <= pg_last_wal_replay_lsn()})
-  or die "slave never caught up";
+  or die "standby never caught up";
 
 $standby->safe_psql('postgres', 'checkpoint');
 $standby->restart;
diff --git a/src/test/recovery/t/002_archiving.pl 
b/src/test/recovery/t/002_archiving.pl
index 42a9afb2f3..e1bd3c95cc 100644
--- a/src/test/recovery/t/002_archiving.pl
+++ b/src/test/recovery/t/002_archiving.pl
@@ -16,7 +16,7 @@
 # Start it
 $node_master->start;
 
-# Take backup for slave
+# Take backup for standby
 $node_master->backup($backup_name);
 
 # Initialize standby node from backup, fetching WAL from archives
diff --git a/src/test/recovery/t/005_replay_delay.pl 
b/src/test/recovery/t/005_replay_delay.pl
index 208b278fcd..8909c4548b 100644
--- a/src/test/recovery/t/005_replay_delay.pl
+++ b/src/test/recovery/t/005_replay_delay.pl
@@ -40,7 +40,7 @@
        "INSERT INTO tab_int VALUES (generate_series(11, 20))");
 
 # Now wait for replay to complete on standby. We're done waiting when the
-# slave has replayed up to the previously saved master LSN.
+# standby has replayed up to the previously saved master LSN.
 my $until_lsn =
   $node_master->safe_psql('postgres', "SELECT pg_current_wal_lsn()");
 
diff --git a/src/test/recovery/t/009_twophase.pl 
b/src/test/recovery/t/009_twophase.pl
index d5bcd25fed..1d1dae66f2 100644
--- a/src/test/recovery/t/009_twophase.pl
+++ b/src/test/recovery/t/009_twophase.pl
@@ -23,7 +23,7 @@ sub configure_and_reload
        is($psql_out, 't', "reload node $name with $parameter");
 }
 
-# Set up two nodes, which will alternately be master and replication slave.
+# Set up two nodes, which will alternately be master and replication standby.
 
 # Setup london node
 my $node_london = get_new_node("london");
@@ -46,9 +46,9 @@ sub configure_and_reload
 configure_and_reload($node_london, "synchronous_standby_names = 'paris'");
 configure_and_reload($node_paris, "synchronous_standby_names = 'london'");
 
-# Set up nonce names for current master and slave nodes
-note "Initially, london is master and paris is slave";
-my ($cur_master, $cur_slave) = ($node_london, $node_paris);
+# Set up nonce names for current master and standby nodes
+note "Initially, london is master and paris is standby";
+my ($cur_master, $cur_standby) = ($node_london, $node_paris);
 my $cur_master_name = $cur_master->name;
 
 # Create table we'll use in the test transactions
@@ -163,7 +163,7 @@ sub configure_and_reload
 $cur_master->psql('postgres', "COMMIT PREPARED 'xact_009_7'");
 
 ###############################################################################
-# Check that WAL replay will cleanup its shared memory state on running slave.
+# Check that WAL replay will cleanup its shared memory state on running 
standby.
 ###############################################################################
 
 $cur_master->psql(
@@ -174,7 +174,7 @@ sub configure_and_reload
        INSERT INTO t_009_tbl VALUES (18, 'issued to ${cur_master_name}');
        PREPARE TRANSACTION 'xact_009_8';
        COMMIT PREPARED 'xact_009_8';");
-$cur_slave->psql(
+$cur_standby->psql(
        'postgres',
        "SELECT count(*) FROM pg_prepared_xacts",
        stdout => \$psql_out);
@@ -182,7 +182,7 @@ sub configure_and_reload
        "Cleanup of shared memory state on running standby without checkpoint");
 
 ###############################################################################
-# Same as in previous case, but let's force checkpoint on slave between
+# Same as in previous case, but let's force checkpoint on standby between
 # prepare and commit to use on-disk twophase files.
 ###############################################################################
 
@@ -193,9 +193,9 @@ sub configure_and_reload
        SAVEPOINT s1;
        INSERT INTO t_009_tbl VALUES (20, 'issued to ${cur_master_name}');
        PREPARE TRANSACTION 'xact_009_9';");
-$cur_slave->psql('postgres', "CHECKPOINT");
+$cur_standby->psql('postgres', "CHECKPOINT");
 $cur_master->psql('postgres', "COMMIT PREPARED 'xact_009_9'");
-$cur_slave->psql(
+$cur_standby->psql(
        'postgres',
        "SELECT count(*) FROM pg_prepared_xacts",
        stdout => \$psql_out);
@@ -203,7 +203,7 @@ sub configure_and_reload
        "Cleanup of shared memory state on running standby after checkpoint");
 
 ###############################################################################
-# Check that prepared transactions can be committed on promoted slave.
+# Check that prepared transactions can be committed on promoted standby.
 ###############################################################################
 
 $cur_master->psql(
@@ -214,26 +214,26 @@ sub configure_and_reload
        INSERT INTO t_009_tbl VALUES (22, 'issued to ${cur_master_name}');
        PREPARE TRANSACTION 'xact_009_10';");
 $cur_master->teardown_node;
-$cur_slave->promote;
+$cur_standby->promote;
 
 # change roles
-note "Now paris is master and london is slave";
-($cur_master, $cur_slave) = ($node_paris, $node_london);
+note "Now paris is master and london is standby";
+($cur_master, $cur_standby) = ($node_paris, $node_london);
 $cur_master_name = $cur_master->name;
 
 # because london is not running at this point, we can't use syncrep commit
 # on this command
 $psql_rc = $cur_master->psql('postgres',
        "SET synchronous_commit = off; COMMIT PREPARED 'xact_009_10'");
-is($psql_rc, '0', "Restore of prepared transaction on promoted slave");
+is($psql_rc, '0', "Restore of prepared transaction on promoted standby");
 
-# restart old master as new slave
-$cur_slave->enable_streaming($cur_master);
-$cur_slave->append_conf(
+# restart old master as new standby
+$cur_standby->enable_streaming($cur_master);
+$cur_standby->append_conf(
        'recovery.conf', qq(
 recovery_target_timeline='latest'
 ));
-$cur_slave->start;
+$cur_standby->start;
 
 ###############################################################################
 # Check that prepared transactions are replayed after soft restart of standby
@@ -250,12 +250,12 @@ sub configure_and_reload
        INSERT INTO t_009_tbl VALUES (24, 'issued to ${cur_master_name}');
        PREPARE TRANSACTION 'xact_009_11';");
 $cur_master->stop;
-$cur_slave->restart;
-$cur_slave->promote;
+$cur_standby->restart;
+$cur_standby->promote;
 
 # change roles
-note "Now london is master and paris is slave";
-($cur_master, $cur_slave) = ($node_london, $node_paris);
+note "Now london is master and paris is standby";
+($cur_master, $cur_standby) = ($node_london, $node_paris);
 $cur_master_name = $cur_master->name;
 
 $cur_master->psql(
@@ -265,18 +265,18 @@ sub configure_and_reload
 is($psql_out, '1',
        "Restore prepared transactions from files with master down");
 
-# restart old master as new slave
-$cur_slave->enable_streaming($cur_master);
-$cur_slave->append_conf(
+# restart old master as new standby
+$cur_standby->enable_streaming($cur_master);
+$cur_standby->append_conf(
        'recovery.conf', qq(
 recovery_target_timeline='latest'
 ));
-$cur_slave->start;
+$cur_standby->start;
 
 $cur_master->psql('postgres', "COMMIT PREPARED 'xact_009_11'");
 
 ###############################################################################
-# Check that prepared transactions are correctly replayed after slave hard
+# Check that prepared transactions are correctly replayed after standby hard
 # restart while master is down.
 ###############################################################################
 
@@ -289,13 +289,13 @@ sub configure_and_reload
        PREPARE TRANSACTION 'xact_009_12';
        ");
 $cur_master->stop;
-$cur_slave->teardown_node;
-$cur_slave->start;
-$cur_slave->promote;
+$cur_standby->teardown_node;
+$cur_standby->start;
+$cur_standby->promote;
 
 # change roles
-note "Now paris is master and london is slave";
-($cur_master, $cur_slave) = ($node_paris, $node_london);
+note "Now paris is master and london is standby";
+($cur_master, $cur_standby) = ($node_paris, $node_london);
 $cur_master_name = $cur_master->name;
 
 $cur_master->psql(
@@ -305,13 +305,13 @@ sub configure_and_reload
 is($psql_out, '1',
        "Restore prepared transactions from records with master down");
 
-# restart old master as new slave
-$cur_slave->enable_streaming($cur_master);
-$cur_slave->append_conf(
+# restart old master as new standby
+$cur_standby->enable_streaming($cur_master);
+$cur_standby->append_conf(
        'recovery.conf', qq(
 recovery_target_timeline='latest'
 ));
-$cur_slave->start;
+$cur_standby->start;
 
 $cur_master->psql('postgres', "COMMIT PREPARED 'xact_009_12'");
 
@@ -332,7 +332,7 @@ sub configure_and_reload
        CHECKPOINT;
        COMMIT PREPARED 'xact_009_13';");
 
-$cur_slave->psql(
+$cur_standby->psql(
        'postgres',
        "SELECT count(*) FROM t_009_tbl2",
        stdout => \$psql_out);
@@ -383,13 +383,13 @@ sub configure_and_reload
 is($psql_out, qq{27|issued to paris},
    "Check expected t_009_tbl2 data on master");
 
-$cur_slave->psql(
+$cur_standby->psql(
        'postgres',
        "SELECT count(*) FROM pg_prepared_xacts",
        stdout => \$psql_out);
-is($psql_out, '0', "No uncommitted prepared transactions on slave");
+is($psql_out, '0', "No uncommitted prepared transactions on standby");
 
-$cur_slave->psql(
+$cur_standby->psql(
        'postgres',
        "SELECT * FROM t_009_tbl ORDER BY id",
        stdout => \$psql_out);
@@ -415,11 +415,11 @@ sub configure_and_reload
 24|issued to paris
 25|issued to london
 26|issued to london},
-   "Check expected t_009_tbl data on slave");
+   "Check expected t_009_tbl data on standby");
 
-$cur_slave->psql(
+$cur_standby->psql(
        'postgres',
        "SELECT * FROM t_009_tbl2",
        stdout => \$psql_out);
 is($psql_out, qq{27|issued to paris},
-   "Check expected t_009_tbl2 data on slave");
+   "Check expected t_009_tbl2 data on standby");
diff --git a/src/test/recovery/t/012_subtransactions.pl 
b/src/test/recovery/t/012_subtransactions.pl
index c99733cad7..216c3331d6 100644
--- a/src/test/recovery/t/012_subtransactions.pl
+++ b/src/test/recovery/t/012_subtransactions.pl
@@ -18,11 +18,11 @@
 $node_master->backup('master_backup');
 $node_master->psql('postgres', "CREATE TABLE t_012_tbl (id int)");
 
-# Setup slave node
-my $node_slave = get_new_node('slave');
-$node_slave->init_from_backup($node_master, 'master_backup',
+# Setup standby node
+my $node_standby = get_new_node('standby');
+$node_standby->init_from_backup($node_master, 'master_backup',
        has_streaming => 1);
-$node_slave->start;
+$node_standby->start;
 
 # Switch to synchronous replication
 $node_master->append_conf(
@@ -100,31 +100,31 @@
        BEGIN;
        SELECT hs_subxids(127);
        COMMIT;");
-$node_master->wait_for_catchup($node_slave, 'replay',
+$node_master->wait_for_catchup($node_standby, 'replay',
        $node_master->lsn('insert'));
-$node_slave->psql(
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
 is($psql_out, '8128', "Visible");
 $node_master->stop;
-$node_slave->promote;
+$node_standby->promote;
 
-$node_slave->psql(
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
 is($psql_out, '8128', "Visible");
 
 # restore state
-($node_master, $node_slave) = ($node_slave, $node_master);
-$node_slave->enable_streaming($node_master);
-$node_slave->append_conf(
+($node_master, $node_standby) = ($node_standby, $node_master);
+$node_standby->enable_streaming($node_master);
+$node_standby->append_conf(
        'recovery.conf', qq(
 recovery_target_timeline='latest'
 ));
-$node_slave->start;
-$node_slave->psql(
+$node_standby->start;
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
@@ -151,33 +151,33 @@
        BEGIN;
        SELECT hs_subxids(127);
        PREPARE TRANSACTION 'xact_012_1';");
-$node_master->wait_for_catchup($node_slave, 'replay',
+$node_master->wait_for_catchup($node_standby, 'replay',
        $node_master->lsn('insert'));
-$node_slave->psql(
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
 is($psql_out, '-1', "Not visible");
 $node_master->stop;
-$node_slave->promote;
+$node_standby->promote;
 
-$node_slave->psql(
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
 is($psql_out, '-1', "Not visible");
 
 # restore state
-($node_master, $node_slave) = ($node_slave, $node_master);
-$node_slave->enable_streaming($node_master);
-$node_slave->append_conf(
+($node_master, $node_standby) = ($node_standby, $node_master);
+$node_standby->enable_streaming($node_master);
+$node_standby->append_conf(
        'recovery.conf', qq(
 recovery_target_timeline='latest'
 ));
-$node_slave->start;
+$node_standby->start;
 $psql_rc = $node_master->psql('postgres', "COMMIT PREPARED 'xact_012_1'");
 is($psql_rc, '0',
-"Restore of PGPROC_MAX_CACHED_SUBXIDS+ prepared transaction on promoted slave"
+"Restore of PGPROC_MAX_CACHED_SUBXIDS+ prepared transaction on promoted 
standby"
 );
 
 $node_master->psql(
@@ -192,33 +192,33 @@
        BEGIN;
        SELECT hs_subxids(201);
        PREPARE TRANSACTION 'xact_012_1';");
-$node_master->wait_for_catchup($node_slave, 'replay',
+$node_master->wait_for_catchup($node_standby, 'replay',
        $node_master->lsn('insert'));
-$node_slave->psql(
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
 is($psql_out, '-1', "Not visible");
 $node_master->stop;
-$node_slave->promote;
+$node_standby->promote;
 
-$node_slave->psql(
+$node_standby->psql(
        'postgres',
        "SELECT coalesce(sum(id),-1) FROM t_012_tbl",
        stdout => \$psql_out);
 is($psql_out, '-1', "Not visible");
 
 # restore state
-($node_master, $node_slave) = ($node_slave, $node_master);
-$node_slave->enable_streaming($node_master);
-$node_slave->append_conf(
+($node_master, $node_standby) = ($node_standby, $node_master);
+$node_standby->enable_streaming($node_master);
+$node_standby->append_conf(
        'recovery.conf', qq(
 recovery_target_timeline='latest'
 ));
-$node_slave->start;
+$node_standby->start;
 $psql_rc = $node_master->psql('postgres', "ROLLBACK PREPARED 'xact_012_1'");
 is($psql_rc, '0',
-"Rollback of PGPROC_MAX_CACHED_SUBXIDS+ prepared transaction on promoted slave"
+"Rollback of PGPROC_MAX_CACHED_SUBXIDS+ prepared transaction on promoted 
standby"
 );
 
 $node_master->psql(
-- 
2.14.0

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