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== riak ==
Riak, a scalable and reliable data store, is available in Fedora 15.
Riak is a Dynamo-inspired key/value store, written in Erlang, that scales predictably and easily. Riak also simplifies development by giving developers the ability to quickly prototype, test, and deploy their applications.
A truly fault-tolerant system, Riak has no single point of failure. No machines are special or central in Riak, so developers and operations professionals can decide exactly how fault-tolerant they want and need their applications to be.
== mysql ==
{{package|mysql}} has been updated to version 5.5.8.  Included are improved scalability and performance.  From the release announcement: ''"Higher availability: New semi-synchronous replication and Replication Heart Beat improve failover speed and reliability."''
== postgresql ==
{{package|postgresql}} has been updated from 8.4.4 to 9.0.3.  In addition to numerous security and other bugfixes, this release contains a number of new features:
* Built-in replication based on log shipping.ster with multiple read-only slave servers
* Easier database object permissions management
* Broadly enhanced stored procedure support
* More advanced reporting queries
* New trigger features
* Deferrable unique constraints
* Mass updates to unique keys are now possible without trickery
* Exclusion constraints
* New and enhanced security features
* New high-performance implementation of the LISTEN/NOTIFY feature
* New implementation of VACUUM FULL
* New contrib module pg_upgrade to support in-place upgrades from 8.3 or 8.4 to 9.0
* Multiple performance enhancements for specific types of queries, including elimination of unnecessary joins
* EXPLAIN enhancements
* hstore improvements
{{admon/note|Requires database dump|
Upgrading requires a dump/restore using pg_dump and pg_restore}}
{{admon/warning|Incompatible Changes|
Version 9.0 contains a number of changes that selectively break backwards compatibility in order to support new features and code quality improvements.  Refer to the release notes at}}
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Revision as of 00:06, 22 January 2013

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