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== Getting started ==
 
== Getting started ==
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* [https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
 
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 +
 
= Welcome to Pgpool Wiki! =
 
= Welcome to Pgpool Wiki! =
  
 
== What is pgpool-II? ==
 
== What is pgpool-II? ==
  
−
pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It provides the following features.
+
pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It is licensed under BSD license. It provides the following features.
  
−
* Connection Pooling
+
* '''Connection Pooling'''
−
:pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
+
: pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
  
−
* Replication
+
* '''Replication'''
−
:pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.
+
: pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.
  
−
* Load Balance
+
* '''Load Balance'''
−
:If a database is replicated, executing a SELECT query on any server will return the same result. pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at the same time.
+
: If a database is replicated, executing a SELECT query on any server will return the same result. pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at the same time.
  
−
* Limiting Exceeding Connections
+
* '''Limiting Exceeding Connections'''
−
:There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.
+
: There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.
  
−
* Parallel Query
+
* '''Parallel Query'''
−
:Using the parallel query function, data can be divided among the multiple servers, so that a query can be executed on all the servers concurrently to reduce the overall execution time. Parallel query works the best when searching large-scale data.
+
: Using the parallel query function, data can be divided among the multiple servers, so that a query can be executed on all the servers concurrently to reduce the overall execution time. Parallel query works the best when searching large-scale data.
  
 
pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that pgpool-II is the actual PostgreSQL server, and the server (backend) sees pgpool-II as one of its clients. Because pgpool-II is transparent to both the server and the client, an existing database application can be used with pgpool-II almost without a change to its sources.
 
pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that pgpool-II is the actual PostgreSQL server, and the server (backend) sees pgpool-II as one of its clients. Because pgpool-II is transparent to both the server and the client, an existing database application can be used with pgpool-II almost without a change to its sources.
  
−
== Where can I get pgpool-II? ==
+
== pgpool-II License ==
 +
 
 +
Copyright (c) 2003-2013  PgPool Global Development Group
 +
 
 +
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.
 +
 
 +
== Stable versions ==
 +
 
 +
* pgppool-II 3.3
 +
* [[pgppool-II 3.2]]
 +
* pgppool-II 3.1
 +
* pgppool-II 3.0
 +
 
 +
= What's new =
 +
== Stable ==
 +
 
 +
=== Missing regression test suite in pgpool-II 3.3.0.tar.gz (2013/07/31) ===
 +
 
 +
New regression test suite was not accidentally included in the pgpool-II 3.3.0.tar.gz tar ball.
 +
You can get it from git repository or download from
 +
[http://www.pgpool.net/download.php?f=regression-3.3.0.tar.gz here].
 +
 
 +
=== pgpool-II 3.3 and pgpoolAdmin 3.3 officially released (2013/07/30) ===
 +
 
 +
Pgpool-II 3.3 is now officially released.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
V3.3's new features are:
 +
 
 +
* Enhancements for watchdog
 +
** New monitoring method of watchdog lifecheck using heartbeat signal
 +
** Interlocking of failover/failback script
 +
** Secure watchdog communication
 +
** PCP command for retrieving the watchdog status
 +
** etc.
 +
* Othres
 +
** Import PostgreSQL 9.2 raw parser
 +
** New pgpool_setup tool
 +
** Support for using CREATE EXTENSION to install pgpool specific extensions
 +
** regression test suit
 +
** etc.
 +
 
 +
* [http://www.pgpool.net/docs/latest/NEWS.txt pgpool-II 3.3 release note(English)]
 +
* [http://www.pgpool.net/docs/latest/pgpool-ja.html#release3.3.0 pgpool-II 3.3 release note(Japanese)]
 +
 
 +
=== pgpool-II 3.2.5, 3.1.8, 3.0.12 officially released (2013/07/10) ===
 +
 
 +
These are the latest stable versions of each major branches.
 +
 
 +
You can download them [http://pgpool.net/mediawiki/index.php/Downloads here].
 +
 
 +
Learn more about pgpool-II 3.2.5:
 +
 
 +
* [http://www.pgpool.net/docs/pgpool-II-3.2.5/NEWS.txt pgpool-II 3.2.5 release note(English)]
 +
* [http://www.pgpool.net/docs/pgpool-II-3.2.5/pgpool-ja.html#release3.2.5 pgpool-II 3.2.5 release note(Japanese)]
 +
 
 +
Learn more about pgpool-II 3.1.8:
 +
 
 +
* [http://www.pgpool.net/docs/pgpool-II-3.1.8/NEWS.txt pgpool-II 3.1.8 release note(English)]
 +
* [http://www.pgpool.net/docs/pgpool-II-3.1.8/pgpool-ja.html#release3.1.8 pgpool-II 3.1.8 release note(Japanese)]
 +
 
 +
Learn more about pgpool-II 3.0.12:
 +
 
 +
* [http://www.pgpool.net/docs/pgpool-II-3.0.12/NEWS.txt pgpool-II 3.0.12 release note(English)]
 +
* [http://www.pgpool.net/docs/pgpool-II-3.0.12/pgpool-ja.html#release pgpool-II 3.0.12 release note(Japanese)]
 +
 
 +
== Development ==
 +
 
 +
=== pgpool-II 3.3 RC1 released (2013/07/25) ===
 +
 
 +
Pgpool-II 3.3 RC1 is now relased. This is not a stable version but just for developers.
  
−
pgpool-II is licensed under BSD license. You can download it from [http://pgfoundry.org/projects/pgpool/ pgpool-II development page]. The latest stable version of pgpool-II is [http://pgfoundry.org/frs/download.php/3076/pgpool-II-3.0.4.tar.gz 3.0.4].
+
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
−
== pgpool-II 3.0 officially released!! ==
+
=== pgpool-II 3.3 beta1 released (2013/06/12) ===
  
−
The biggest feature of this version is pgpool-II 3.0 now can work with PostgreSQL 9.0's Streaming replication/Hot Standby. This is pretty much similar to the master/slave mode with Slony-I but you can enjoy much more sophisticated Streaming replication (DDL, large object replication etc.) Learn more about pgpool-II 3.0:
+
Pgpool-II 3.3 beta1 is now relased. This is not a stable version but just for developers.
  
−
* [http://www.sraoss.co.jp/event_seminar/2010/20100702-03char10.pdf Talk at CHAR(10) Oxford(English)]
+
Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.3 better!
−
* [http://pgpool.projects.postgresql.org/NEWS.txt pgpool-II 3.0 release note(English)]
 
−
* [http://pgpool.projects.postgresql.org/pgpool-II/doc/pgpool-ja.html#release pgpool-II 3.0 release note(Japanese)]
 
  
−
== Documentations ==
+
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
−
* pgpool-II official documents
+
=== pgpool-II 3.3 alpha1 released (2013/05/17) ===
−
** [http://pgpool.projects.postgresql.org/pgpool-II/doc/pgpool-en.html pgpool-II manual(English)]
 
−
** [http://pgpool.projects.postgresql.org/pgpool-II/doc/pgpool-ja.html pgpool-II manual(Japanese)]
 
−
** [http://pgpool.projects.postgresql.org/pgpool-II/doc/tutorial-en.html pgpool-II tutorial(English)]
 
−
** [http://pgpool.projects.postgresql.org/pgpool-II/doc/tutorial-ja.htmlpgpool-II tutorial(Japanese)]
 
  
−
* pgpoolAdmin official documents
+
Pgpool-II 3.3 alpha1 is now relased. This is not a stable version but just for developers.
−
** [http://pgpool.projects.postgresql.org/pgpoolAdmin/doc/index_en.html pgpoolAdmin manual(English)]
 
−
** [http://pgpool.projects.postgresql.org/pgpoolAdmin/doc/index_ja.html pgpoolAdmin manual(Japanese)]
 
  
−
* User conributed documentations
+
V3.3 has a new feature:
−
** [http://pgpool.projects.postgresql.org/contrib_docs/pgpool-II_for_beginners.pdf Gerd Koenig's "pgpool-II for beginners"]
+
* Enhancements for watchdog
−
** [http://lets.postgresql.jp/documents/technical/pgpool/1 What is pgpool-II(in Japanese)]
+
** New monitoring method of watchdog lifecheck using heartbeat signal
−
** [http://lets.postgresql.jp/documents/technical/pgpool/2 Creating a replication system using pgpool-II(in Japanese)]
+
** Interlocking of failover/failback script
−
** [http://www.sraoss.co.jp/event_seminar/2010/20100702-03char10.pdf Making master/slave systems work better with pgpool-II]
+
** Secure watchdog communication
−
** [http://pgpool.projects.postgresql.org/contrib_docs/simple_sr_setting/index.html Simple Streaming replication setting with pgpool-II(English)]
+
** etc.
−
** [http://pgpool.projects.postgresql.org/contrib_docs/simple_sr_setting/index-ja.html Simple Streaming replication setting with pgpool-II(Japanese)]
+
* Othres
−
** [http://pgpool.projects.postgresql.org/contrib_docs/simple_sr_setting2/index.html Simple Streaming replication setting with pgpool-II(multiple server version, English)]
+
** Import PostgreSQL 9.2 raw parser
−
** [http://pgpool.projects.postgresql.org/contrib_docs/simple_sr_setting2/index-ja.html Simple Streaming replication setting with pgpool-II(multiple server version, Japanese)]
+
** New pgpool_setup tool
 +
** Support for using CREATE EXTENSION to install pgpool specific extensions
 +
You can download it from [http://pgpool.net/mediawiki/index.php/Developer_releases here].
  
−
* [[FAQ|Frequetly asked questions]]
+
== Old ==
 +
See [[Old news|this page]].
  
−
== Developers documentations ==
+
= Where can I get commercial support for pgpool-II? =
  
−
* [http://pgpool.projects.postgresql.org/pgpoolAdmin-add-directives.txt How to add configurfation directives to pgpoolAdmin]
+
Some commercial packages include pgpool-II support. Consulting and annual support can be purchased from SRA OSS, Inc. Japan(http://www.sraoss.co.jp/index_en.php).

2013年8月12日 (月) 00:51時点における最新版


Welcome to Pgpool Wiki!

What is pgpool-II?

pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client. It is licensed under BSD license. It provides the following features.

  • Connection Pooling
pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
  • Replication
pgpool-II can manage multiple PostgreSQL servers. Using the replication function enables creating a realtime backup on 2 or more physical disks, so that the service can continue without stopping servers in case of a disk failure.
  • Load Balance
If a database is replicated, executing a SELECT query on any server will return the same result. pgpool-II takes an advantage of the replication feature to reduce the load on each PostgreSQL server by distributing SELECT queries among multiple servers, improving system's overall throughput. At best, performance improves proportionally to the number of PostgreSQL servers. Load balance works best in a situation where there are a lot of users executing many queries at the same time.
  • Limiting Exceeding Connections
There is a limit on the maximum number of concurrent connections with PostgreSQL, and connections are rejected after this many connections. Setting the maximum number of connections, however, increases resource consumption and affect system performance. pgpool-II also has a limit on the maximum number of connections, but extra connections will be queued instead of returning an error immediately.
  • Parallel Query
Using the parallel query function, data can be divided among the multiple servers, so that a query can be executed on all the servers concurrently to reduce the overall execution time. Parallel query works the best when searching large-scale data.

pgpool-II talks PostgreSQL's backend and frontend protocol, and relays a connection between them. Therefore, a database application (frontend) thinks that pgpool-II is the actual PostgreSQL server, and the server (backend) sees pgpool-II as one of its clients. Because pgpool-II is transparent to both the server and the client, an existing database application can be used with pgpool-II almost without a change to its sources.

pgpool-II License

Copyright (c) 2003-2013 PgPool Global Development Group

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty.

Stable versions

What's new

Stable

Missing regression test suite in pgpool-II 3.3.0.tar.gz (2013/07/31)

New regression test suite was not accidentally included in the pgpool-II 3.3.0.tar.gz tar ball. You can get it from git repository or download from here.

pgpool-II 3.3 and pgpoolAdmin 3.3 officially released (2013/07/30)

Pgpool-II 3.3 is now officially released.

You can download them here.

V3.3's new features are:

  • Enhancements for watchdog
    • New monitoring method of watchdog lifecheck using heartbeat signal
    • Interlocking of failover/failback script
    • Secure watchdog communication
    • PCP command for retrieving the watchdog status
    • etc.
  • Othres
    • Import PostgreSQL 9.2 raw parser
    • New pgpool_setup tool
    • Support for using CREATE EXTENSION to install pgpool specific extensions
    • regression test suit
    • etc.

pgpool-II 3.2.5, 3.1.8, 3.0.12 officially released (2013/07/10)

These are the latest stable versions of each major branches.

You can download them here.

Learn more about pgpool-II 3.2.5:

Learn more about pgpool-II 3.1.8:

Learn more about pgpool-II 3.0.12:

Development

pgpool-II 3.3 RC1 released (2013/07/25)

Pgpool-II 3.3 RC1 is now relased. This is not a stable version but just for developers.

You can download it from here.

pgpool-II 3.3 beta1 released (2013/06/12)

Pgpool-II 3.3 beta1 is now relased. This is not a stable version but just for developers.

Users are encouraged to take part in our beta test program. Please help us in testing and making pgpool-II 3.3 better!

You can download it from here.

pgpool-II 3.3 alpha1 released (2013/05/17)

Pgpool-II 3.3 alpha1 is now relased. This is not a stable version but just for developers.

V3.3 has a new feature:

  • Enhancements for watchdog
    • New monitoring method of watchdog lifecheck using heartbeat signal
    • Interlocking of failover/failback script
    • Secure watchdog communication
    • etc.
  • Othres
    • Import PostgreSQL 9.2 raw parser
    • New pgpool_setup tool
    • Support for using CREATE EXTENSION to install pgpool specific extensions

You can download it from here.

Old

See this page.

Where can I get commercial support for pgpool-II?

Some commercial packages include pgpool-II support. Consulting and annual support can be purchased from SRA OSS, Inc. Japan(http://www.sraoss.co.jp/index_en.php).

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