修改wsrep_on参数值为off，drop表，打开另一个会话，发现表依旧存在。这个参数的主要作用是控制当前结点的写入是不是要复制到其他节点。与MySQL的sql_log_bin很相似。测试过程如下：
pxc01-->node1
mysql> show variables like 'wsrep_on';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| wsrep_on | ON |
+---------------+-------+
1 row in set (0.00 sec)
mysql> show status like 'wsrep%';
+----------------------------------+-------------------------------------------------------+
| Variable_name | Value |
+----------------------------------+-------------------------------------------------------+
| wsrep_local_state_uuid | 23e153df-b664-11e9-89e3-ff2ae4f77a67 |
| wsrep_protocol_version | 9 |
| wsrep_last_applied | 16 |
| wsrep_last_committed | 16 |
| wsrep_replicated | 1 |
| wsrep_replicated_bytes | 296 |
| wsrep_repl_keys | 3 |
| wsrep_repl_keys_bytes | 48 |
| wsrep_repl_data_bytes | 178 |
| wsrep_repl_other_bytes | 0 |
| wsrep_received | 6 |
| wsrep_received_bytes | 1206 |
| wsrep_local_commits | 1 |
| wsrep_local_cert_failures | 0 |
| wsrep_local_replays | 0 |
| wsrep_local_send_queue | 0 |
| wsrep_local_send_queue_max | 1 |
| wsrep_local_send_queue_min | 0 |
| wsrep_local_send_queue_avg | 0.000000 |
| wsrep_local_recv_queue | 0 |
| wsrep_local_recv_queue_max | 1 |
| wsrep_local_recv_queue_min | 0 |
| wsrep_local_recv_queue_avg | 0.000000 |
| wsrep_local_cached_downto | 14 |
| wsrep_flow_control_paused_ns | 0 |
| wsrep_flow_control_paused | 0.000000 |
| wsrep_flow_control_sent | 0 |
| wsrep_flow_control_recv | 0 |
| wsrep_flow_control_interval | [ 173, 173 ] |
| wsrep_flow_control_interval_low | 173 |
| wsrep_flow_control_interval_high | 173 |
| wsrep_flow_control_status | OFF |
| wsrep_cert_deps_distance | 2.000000 |
| wsrep_apply_oooe | 0.000000 |
| wsrep_apply_oool | 0.000000 |
| wsrep_apply_window | 1.000000 |
| wsrep_commit_oooe | 0.000000 |
| wsrep_commit_oool | 0.000000 |
| wsrep_commit_window | 1.000000 |
| wsrep_local_state | 4 |
| wsrep_local_state_comment | Synced |
| wsrep_cert_index_size | 5 |
| wsrep_cert_bucket_count | 22 |
| wsrep_gcache_pool_size | 2328 |
| wsrep_causal_reads | 0 |
| wsrep_cert_interval | 0.000000 |
| wsrep_open_transactions | 0 |
| wsrep_open_connections | 0 |
| wsrep_ist_receive_status | |
| wsrep_ist_receive_seqno_start | 0 |
| wsrep_ist_receive_seqno_current | 0 |
| wsrep_ist_receive_seqno_end | 0 |
| wsrep_incoming_addresses | 196.55.3.102:3308,196.55.3.102:3307,196.55.3.102:3306 |
| wsrep_cluster_weight | 3 |
| wsrep_desync_count | 0 |
| wsrep_evs_delayed | |
| wsrep_evs_evict_list | |
| wsrep_evs_repl_latency | 0/0/0/0/0 |
| wsrep_evs_state | OPERATIONAL |
| wsrep_gcomm_uuid | e0b9cedd-b698-11e9-90d1-8fe12b369d0b |
| wsrep_cluster_conf_id | 3 |
| wsrep_cluster_size | 3 |
| wsrep_cluster_state_uuid | 23e153df-b664-11e9-89e3-ff2ae4f77a67 |
| wsrep_cluster_status | Primary |
| wsrep_connected | ON |
| wsrep_local_bf_aborts | 0 |
| wsrep_local_index | 2 |
| wsrep_provider_name | Galera |
| wsrep_provider_vendor | Codership Oy <info@codership.com> |
| wsrep_provider_version | 3.37(r) |
| wsrep_ready | ON |
+----------------------------------+-------------------------------------------------------+
71 rows in set (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| roidba |
| sys |
+--------------------+
5 rows in set (0.00 sec)
mysql> set wsrep_on=off;
Query OK, 0 rows affected (0.00 sec)
mysql> use roidba
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+------------------+
| Tables_in_roidba |
+------------------+
| t |
| t1 |
+------------------+
2 rows in set (0.00 sec)
mysql> drop table t;
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> show tables;
+------------------+
| Tables_in_roidba |
+------------------+
| t1 |
+------------------+
1 row in set (0.00 sec)
pxc02-->node2
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| roidba |
| sys |
+--------------------+
5 rows in set (0.00 sec)
mysql> use roidba;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+------------------+
| Tables_in_roidba |
+------------------+
| t |
| t1 |
+------------------+
2 rows in set (0.00 sec)免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。
