资讯

精准传达 • 有效沟通

从品牌网站建设到网络营销策划，从策略到执行的一站式服务

网站建设 >

查看其它板块

postgresql10pub/sub使用简明教程

1.初始化配置

站在用户的角度思考问题，与客户深入沟通，找到长垣网站设计与长垣网站推广的解决方案，凭借多年的经验，让设计与互联网技术结合，创造个性化、用户体验好的作品，建站类型包括：网站制作、成都网站设计、企业官网、英文网站、手机端网站、网站推广、域名注册、网页空间、企业邮箱。业务覆盖长垣地区。

1).pubdb

postgres=# create database pubdb;

postgres=# \c pubdb 

You are now connected to database "pubdb" as user "postgres".

pubdb=# create table t1(id bigserial primary key, name varchar(20));

CREATE TABLE

pubdb=# create publication pub_mdb1_t1 for table t1;

CREATE PUBLICATION

pubdb=# 

pubdb=# select * from pg_publication;

   pubname   | pubowner | puballtables | pubinsert | pubupdate | pubdelete 

-------------+----------+--------------+-----------+-----------+-----------

 pub_mdb1_t1 |       10 | f            | t         | t         | t

(1 row)

pubdb=# 

pubdb=# insert into t1(name) values ('Peter'),('Chris'),('Jasmine'),('Jeans'),('Willam');

INSERT 0 5

pubdb=# select * from t1;

 id |  name   

----+---------

  1 | Peter

  2 | Chris

  3 | Jasmine

  4 | Jeans

  5 | Willam

(5 rows)

pubdb=# 

pubdb=# 

pubdb=# \q

[postgres@pgmdb01 ~]$

2).subdb

$ createdb subdb

恢复原发布数据

$ pg_restore -d subdb t1.dump

创建提交，不复制原存在数据,此时sub端启动一个logical replication worker，

pub端创建一个pg_replication_slot

$ psql subdb

subdb=# CREATE SUBSCRIPTION sub_mdb1_t1

    CONNECTION 'host=172.16.3.228 port=5432 user=postgres password=123456 dbname=pubdb'

    PUBLICATION pub_mdb1_t1

    WITH (copy_data = false);

NOTICE:  created replication slot "sub_mdb1_t1" on publisher

CREATE SUBSCRIPTION

subdb=# 

subdb=# 

subdb=# 

subdb=# select * from t1;

 id |  name   

----+---------

  1 | Peter

  2 | Chris

  3 | Jasmine

  4 | Jeans

  5 | Willam

(5 rows)

查看提交信息

subdb=# \dRs+

List of subscriptions

-[ RECORD 1 ]------+-----------------------------------------------------------------------

Name               | sub_mdb1_t1

Owner              | postgres

Enabled            | t

Publication        | {pub_mdb1_t1}

Synchronous commit | off

Conninfo           | host=172.16.3.228 port=5432 user=postgres password=123456 dbname=pubdb

subdb=# \dRs

List of subscriptions

-[ RECORD 1 ]--------------

Name        | sub_mdb1_t1

Owner       | postgres

Enabled     | t

Publication | {pub_mdb1_t1}

subdb=# 

3).pubdb查看发布复制信息

pubdb=# 

pubdb=# select * from pg_stat_replication;

-[ RECORD 1 ]----+------------------------------

pid              | 16501

usesysid         | 10

usename          | postgres

application_name | sub_mdb1_t1

client_addr      | 172.16.3.230

client_hostname  | 

client_port      | 52682

backend_start    | 2017-10-10 14:59:18.469715+08

backend_xmin     | 

state            | streaming

sent_lsn         | 0/F036E90

write_lsn        | 0/F036E90

flush_lsn        | 0/F036E90

replay_lsn       | 0/F036E90

write_lag        | 

flush_lag        | 

replay_lag       | 

sync_priority    | 0

sync_state       | async

pubdb=# select * from pg_replication_slots ;

-[ RECORD 1 ]-------+------------

slot_name           | sub_mdb1_t1

plugin              | pgoutput

slot_type           | logical

datoid              | 26203

database            | pubdb

temporary           | f

active              | t

active_pid          | 16501

xmin                | 

catalog_xmin        | 604

restart_lsn         | 0/F036E58

confirmed_flush_lsn | 0/F036E90

2.插入增量发布记录

1).pubdb插入增量

pubdb=# pubdb=# insert into t1(name) values('Zeng'),('Feng'),('Mia');

INSERT 0 3

pubdb=# \x

Expanded display is off.

pubdb=# select * from t1;

 id |  name   

----+---------

  1 | Peter

  2 | Chris

  3 | Jasmine

  4 | Jeans

  5 | Willam

  6 | Zeng

  7 | Feng

  8 | Mia

(8 rows)

pubdb=# 

pubdb=# select * from pg_stat_replication;

-[ RECORD 1 ]----+------------------------------

pid              | 16501

usesysid         | 10

usename          | postgres

application_name | sub_mdb1_t1

client_addr      | 172.16.3.230

client_hostname  | 

client_port      | 52682

backend_start    | 2017-10-10 14:59:18.469715+08

backend_xmin     | 

state            | streaming

sent_lsn         | 0/F0372B8

write_lsn        | 0/F0372B8

flush_lsn        | 0/F0372B8

replay_lsn       | 0/F0372B8

write_lag        | 

flush_lag        | 

replay_lag       | 

sync_priority    | 0

sync_state       | async

pubdb=# select * from pg_replication_slots ;

-[ RECORD 1 ]-------+------------

slot_name           | sub_mdb1_t1

plugin              | pgoutput

slot_type           | logical

datoid              | 26203

database            | pubdb

temporary           | f

active              | t

active_pid          | 16501

xmin                | 

catalog_xmin        | 605

restart_lsn         | 0/F037280

confirmed_flush_lsn | 0/F0372B8

pubdb=# 

[postgres@pgmdb01 ~]$ ps -fU postgres

UID        PID  PPID  C STIME TTY          TIME CMD

postgres 15874 15873  0 12:44 pts/2    00:00:00 -bash

postgres 15950     1  0 12:50 ?        00:00:00 /opt/pgsql/10.0/bin/postmaster -D /pgdata10

postgres 15951 15950  0 12:50 ?        00:00:00 postgres: logger process   

postgres 15953 15950  0 12:50 ?        00:00:00 postgres: checkpointer process   

postgres 15954 15950  0 12:50 ?        00:00:00 postgres: writer process   

postgres 15955 15950  0 12:50 ?        00:00:00 postgres: wal writer process   

postgres 15956 15950  0 12:50 ?        00:00:00 postgres: autovacuum launcher process   

postgres 15957 15950  0 12:50 ?        00:00:00 postgres: archiver process   

postgres 15958 15950  0 12:50 ?        00:00:00 postgres: stats collector process   

postgres 15959 15950  0 12:50 ?        00:00:00 postgres: bgworker: logical replication launcher  

postgres 15961 15960  0 12:50 pts/1    00:00:00 -bash

postgres 16077 15874  0 13:08 pts/2    00:00:00 tail -f postgresql-Tue.log

postgres 16082 15950  0 13:10 ?        00:00:00 postgres: postgres pubdb 172.16.3.223(56608) idle

postgres 16083 15950  0 13:10 ?        00:00:00 postgres: postgres pubdb 172.16.3.223(56610) idle

postgres 16501 15950  0 14:59 ?        00:00:00 postgres: wal sender process postgres 172.16.3.230(52682) idle

postgres 16543 15961  0 15:09 pts/1    00:00:00 ps -fU postgres

[postgres@pgmdb01 ~]$ 

sequence增长为最新值8

CREATE SEQUENCE public.t1_id_seq

    INCREMENT 1

    START 8

    MINVALUE 1

    MAXVALUE 9223372036854775807

    CACHE 1;

2).查看增量提交记录

subdb

subdb=# select * from t1;

 id |  name   

----+---------

  1 | Peter

  2 | Chris

  3 | Jasmine

  4 | Jeans

  5 | Willam

  6 | Zeng

  7 | Feng

  8 | Mia

(8 rows)

subdb=# 

[postgres@pgsubdb1 log]$ ps -fU postgres

UID        PID  PPID  C STIME TTY          TIME CMD

postgres   935     1  0 10:28 ?        00:00:01 /opt/pgsql/10.0/bin/postmaster -D /pgdata10

postgres  1001   935  0 10:28 ?        00:00:00 postgres: logger process   

postgres  1005   935  0 10:28 ?        00:00:00 postgres: checkpointer process   

postgres  1006   935  0 10:28 ?        00:00:00 postgres: writer process   

postgres  1007   935  0 10:28 ?        00:00:01 postgres: wal writer process   

postgres  1008   935  0 10:28 ?        00:00:00 postgres: autovacuum launcher process   

postgres  1009   935  0 10:28 ?        00:00:00 postgres: archiver process   

postgres  1010   935  0 10:28 ?        00:00:00 postgres: stats collector process   

postgres  1011   935  0 10:28 ?        00:00:00 postgres: bgworker: logical replication launcher  

postgres  1084  1083  0 10:28 pts/0    00:00:00 -bash

postgres 15551 15550  0 11:48 pts/1    00:00:00 -bash

postgres 16206 16205  0 14:40 pts/2    00:00:00 -bash

postgres 16276  1084  0 14:46 pts/0    00:00:00 psql subdb

postgres 16277   935  0 14:46 ?        00:00:00 postgres: postgres subdb [local] idle

postgres 16324 16206  0 14:56 pts/2    00:00:00 psql subdb

postgres 16325   935  0 14:56 ?        00:00:00 postgres: postgres subdb [local] idle

postgres 16332   935  0 14:59 ?        00:00:00 postgres: bgworker: logical replication worker for subscription 24626  

postgres 16374 15551  0 15:11 pts/1    00:00:00 ps -fU postgres

[postgres@pgsubdb1 log]$

sequence为原始值5，不增长

CREATE SEQUENCE public.t1_id_seq

    INCREMENT 1

    START 5

    MINVALUE 1

    MAXVALUE 9223372036854775807

    CACHE 1;

3.常见问题(特殊情景使用请参见官方文档)

当远程数据库无法连接时,drop SUBSCRIPTION

# ALTER SUBSCRIPTION name DISABLE

# alter subscription sub_measurement set (slot_name=none);

# drop subscription sub_measurement;


本文标题：postgresql10pub/sub使用简明教程
链接URL：http://cdkjz.cn/article/pgshch.html
返回首页 了解更多建站资讯

相关资讯

多年建站经验

多一份参考，总有益处

联系快上网，免费获得专属《策划方案》及报价

咨询相关问题或预约面谈，可以通过以下方式与我们联系

大客户专线   成都：13518219792   座机：028-86922220

在线咨询 提交需求
友情链接 交换友情链接
成都企业网站建设成都展柜制作商标注册蜀锦在线成都建站德阳电信服务器托管宜宾冠赛网站宜宾网站营销推广工业净化空调成都微信小程序开发

成都网站建设公司地址：成都市青羊区太升南路288号锦天国际A座10层 建设咨询028-86922220

成都快上网科技有限公司-四川网站建设设计公司 | 蜀ICP备19037934号 Copyright 2020,ALL Rights Reserved cdkjz.cn | 成都网站建设 | © Copyright 2020版权所有.

专家团队为您提供成都网站建设,成都网站设计,成都品牌网站设计,成都营销型网站制作等服务,成都建网站就找快上网！ | 成都网站建设哪家好？ | 网站建设地图