- PostgreSQL Replication
- Table of Contents
- PostgreSQL Replication
- Credits
- About the Authors
- About the Reviewers
- www.PacktPub.com
- Preface
- 1. Understanding Replication Concepts
- The CAP theory and physical limitations
- Different types of replication
- Using sharding and data distribution
- Summary
- 2. Understanding the PostgreSQL Transaction Log
- How PostgreSQL writes data
- The PostgreSQL disk layout
- Looking into the data directory
- PG_VERSION – PostgreSQL version number
- base – the actual data directory
- global – the global data
- pg_clog – the commit log
- pg_hba.conf – host-based network configuration
- pg_ident.conf – ident authentication
- pg_multixact – multi-transaction status data
- pg_notify – LISTEN/NOTIFY data
- pg_serial – information about committed serializable transactions
- pg_snapshot – exported snapshots
- pg_stat_tmp – temporary statistics data
- pg_subtrans – subtransaction data
- pg_tblspc – symbolic links to tablespaces
- pg_twophase – information about prepared statements
- pg_XLOG – the PostgreSQL transaction log (WAL)
- postgresql.conf – the central PostgreSQL configuration file
- Writing one row of data
- Read consistency
- The PostgreSQL disk layout
- The XLOG and replication
- Understanding consistency and data loss
- Tuning checkpoints and the XLOG
- The internal structure of the XLOG
- Summary
- How PostgreSQL writes data
- 3. Understanding Point-In-Time-Recovery
- 4. Setting up Asynchronous Replication
- 5. Setting up Synchronous Replication
- Setting up synchronous replication
- Understanding practical implications and performance
- Redundancy and stopping replication
- Summary
- 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
- Index
Postgres-XC can be downloaded from http://postgres-xc.sourceforge.net/. For this book, we have used Version 1.0.3 of Postgres-XC.
To compile the code, we have to extract the code using the following command:
tar xvfz pgxc-v1.0.3.tar.gz
Then we can compile the code just like standard PostgreSQL:
cd postgres-xc ./configure --prefix=/usr/local/postgres-xc make make install
Once this has been executed, we can move ahead and configure the cluster.
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