Documentation Database Servers Beat

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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-x-generic-16.pngmysql 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."

http://www.mysql.com


postgresql

Package-x-generic-16.pngpostgresql 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
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Requires database dump
Upgrading requires a dump/restore using pg_dump and pg_restore
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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 http://www.postgresql.org/docs/current/static/release-9-0.html