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Google Cloud SQL Launches in Limited Preview

Google Cloud SQL, which adds a MySQL database Web service to Google's cloud-based App Engine development stack, is now available in a free preview version, Google announced this week.

In a Google Code blog post on Thursday announcing the limited preview, Cloud SQL Product Manager Navneet Joneja wrote, "One of App Engine's most requested features has been a simple way to develop traditional database-driven applications."

The MySQL service works with Google App Engine applications written in Java or Python. Previously, App Engine offered only a non-relational "datastore" with a proprietary syntax called GQL that's similar to SQL syntax. The new preview allows Google Cloud SQL instances of as much as 10GB and "is ideal for small to medium-sized applications," Google said.

Other features of the service listed on the introductory Web site include:

  • Performance similar to that of the Google App Engine datastore
  • SQL prompt within the Google APIs console
  • Compatibility with Python and Java
  • Synchronous or asynchronous replication
  • A command-line tool
  • Export or import databases via mysqldump

Google said most MySQL features will be supported, with certain exceptions such as user-defined functions and MySQL replication. Also, several MySQL statements are unsupported. More information is available on this FAQ page.

The company said the initial limited number of users won't be charged for the service in 2011, but didn't reveal a target date for when it would become generally available and billing would begin. However, Google said users will be given at least a 30-day notice. The App Engine itself is free to use up to a certain quota.

Instructions to sign up for the limited preview can be found here.

About the Author

David Ramel is an editor and writer for 1105 Media.

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