database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-08 11:22:35 +03:00
Code Activity

MDEV-19801: Change defaults for CHANGE MASTER TO so that GTID-based replication is used by default if master supports it

Browse Source 
This commit makes replicas crash-safe by default by changing the
Using_Gtid value to be Slave_Pos on a fresh slave start and after
RESET SLAVE is issued. If the primary server does not support GTIDs
(i.e., version < 10), the replica will fall back to Using_Gtid=No on
slave start and after RESET SLAVE.

The following additional informational messages/warnings are added:

 1. When Using_Gtid is automatically changed. That is, if RESET
SLAVE reverts Using_Gtid back to Slave_Pos, or Using_Gtid is
inferred to No from a CHANGE MASTER TO given with log coordinates
without MASTER_USE_GTID.
 2. If options are ignored in CHANGE MASTER TO. If CHANGE MASTER TO
is given with log coordinates, yet also specifies
MASTER_USE_GTID=Slave_Pos, a warning message is given that the log
coordinate options are ignored.

Additionally, an MTR macro has been added for RESET SLAVE,
reset_slave.inc, which provides modes/options for resetting a slave
in log coordinate or gtid modes. When in log coordinates mode, the
macro will execute CHANGE MASTER TO MASTER_USE_GTID=No after the
RESET SLAVE command. When in GTID mode, an extra parameter,
reset_slave_keep_gtid_state, can be set to reset or preserve the
value of gtid_slave_pos.

Reviewed By:
===========
Andrei Elkin <andrei.elkin@mariadb.com>
This commit is contained in:
Brandon Nesterenko
2022-05-23 14:14:00 -06:00
parent 8c2faad576
commit 5ab5ff08b0
167 changed files with 1404 additions and 344 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
mysql-test/suite/multi_source/mdev-9544.result
View File

@@ -24,9 +24,9 @@ insert into t1 values(1);
create table t2(a int);
insert into t2 values(1);
connection server_4;
change master 'm1' to master_port=MYPORT_1 , master_host='127.0.0.1', master_user='root';
change master 'm2' to master_port=MYPORT_2 , master_host='127.0.0.1', master_user='root';
change master to master_port=MYPORT_3 , master_host='127.0.0.1', master_user='root';
change master 'm1' to master_port=MYPORT_1 , master_host='127.0.0.1', master_user='root', master_use_gtid=no;
change master 'm2' to master_port=MYPORT_2 , master_host='127.0.0.1', master_user='root', master_use_gtid=no;
change master to master_port=MYPORT_3 , master_host='127.0.0.1', master_user='root', master_use_gtid=no;
start all slaves;
set default_master_connection = 'm1';
include/wait_for_slave_to_start.inc
@@ -88,3 +88,6 @@ SET default_master_connection = "m2";
include/wait_for_slave_to_stop.inc
SET default_master_connection = "";
include/wait_for_slave_to_stop.inc
change master to master_use_gtid=slave_pos;
change master 'm1' to master_use_gtid=slave_pos;
change master 'm2' to master_use_gtid=slave_pos;