PostgreSQL 9.1 Released

From: Josh Berkus <josh(at)postgresql(dot)org>
To: pgsql-announce(at)postgresql(dot)org
Subject: PostgreSQL 9.1 Released
Date: 2011-09-12 13:25:44
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The PostgreSQL Global Development Group announces the release of
PostgreSQL 9.1. This latest version of the leading open source database
offers innovative technology, unmatched extensibility, and new features
such as synchronous replication, K-Nearest Neighbor indexing, and
foreign data wrappers.

"PostgreSQL 9.1 provides some of the most advanced enterprise
capabilities of any open source database, and is backed by a vibrant and
innovative community with proven customer success. PostgreSQL is well
positioned for building and running applications in the cloud," said
Charles Fan, Sr. VP R&D, VMware.

Responding to Users

Version 9.1 delivers several features which users have been requesting
for years, removing roadblocks to deploying new or ported applications
on PostgreSQL. These include:

* Synchronous Replication: enable high-availability
with consistency across multiple servers
* Per-Column Collations: support linguistically-correct
sorting per database, table or column.
* Unlogged Tables: greatly improves performance for ephemeral data

"Heroku runs the largest PostgreSQL database-as-a-service in the world,"
said James Lindenbaum, Heroku co-founder. "The release of synchronous
data replication with 9.1 provides our customers with innovative new
ways of protecting mission-critical data, and validates PostgreSQL as
one of the fastest-moving datastores available."

Advancing the State of the Art

Our community of contributors innovates with cutting-edge features.
Version 9.1 includes several which are new to the database industry,
such as:

* K-Nearest-Neighbor Indexing: index on "distance" for
faster location and text-search queries
* Serializable Snapshot Isolation: keeps concurrent transactions
consistent without blocking, using "true serializability"
* Writeable Common Table Expressions: execute complex multi-stage
data updates in a single query
* Security-Enhanced Postgres: deploy military-grade security
and Mandatory Access Control

"OpenERP has always relied on the enterprise-class features of
PostgreSQL to provide a fast, reliable and scalable foundation for the
Business Applications supporting our customers' operations every day.
Data integrity in highly concurrent and transactional contexts is a
critical topic for us, and we're very enthusiastic about the new
Serializable Snapshot Isolation of PostgreSQL 9.1!" said Olivier Dony,
OpenERP Community Manager.

Extending the Database Engine

PostgreSQL's extensibility enables users to add new functionality to a
running production database, and use them for tasks no other database
system can perform. Version 9.1 adds new extensibility tools, including:

* Foreign Data Wrappers: attach and query other databases
from PostgreSQL
* Extensions: easily create, load, and manage new database features

In PostgreSQL's 25th year of database development, our community
continues to advance database technology with every annual release.
Download version 9.1 now and experience the most advanced open source
database system in the world.

More information on PostgreSQL 9.1:
* Release notes
* Presskit
* Guide to 9.0:'s_new_in_PostgreSQL_9.1

Download 9.1 now:
* Main download page:
* Source code:
* One-click installer, including Windows installer:

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