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PostgreSQL Replication, Second Edition

You're reading from   PostgreSQL Replication, Second Edition Leverage the power of PostgreSQL replication to make your databases more robust, secure, scalable, and fast

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Product type Paperback
Published in Jul 2015
Publisher
ISBN-13 9781783550609
Length 322 pages
Edition 1st Edition
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Toc

Table of Contents (17) Chapters Close

Preface 1. Understanding the Concepts of Replication FREE CHAPTER 2. Understanding the PostgreSQL Transaction Log 3. Understanding Point-in-time Recovery 4. Setting Up Asynchronous Replication 5. Setting Up Synchronous Replication 6. Monitoring Your Setup 7. Understanding Linux High Availability 8. Working with PgBouncer 9. Working with pgpool 10. Configuring Slony 11. Using SkyTools 12. Working with Postgres-XC 13. Scaling with PL/Proxy 14. Scaling with BDR 15. Working with Walbouncer Index

Adding tables to replication and managing problems

Once we have added this table to the system, we can add it to the replication setup. However, doing so is a little complex. First of all, we have to create a new table set and merge it with the one we already have. Burcado and Londiste are a bit more convenient here and DDLs are easier. So, for a brief moment, we will have two table sets involved. The script goes like this:

#!/bin/sh

MASTERDB=db1
SLAVEDB=db2
HOST1=localhost
HOST2=localhost
DBUSER=hs

slonik<<_EOF_
cluster name = first_cluster;

node 1 admin conninfo = 'dbname=$MASTERDB host=$HOST1 user=$DBUSER';
node 2 admin conninfo = 'dbname=$SLAVEDB host=$HOST2 user=$DBUSER';

create set (id=2, origin=1,
comment='a second replication set');
set add table (set id=2, origin=1, id=5,
fully qualified name = 'public.t_second',
  comment='second table');
subscribe set(id=1, provider=1,receiver=2);
merge set(id=1, add id=2,origin=1);
_EOF_...
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