PLEASE SAVE YOUR WORK! THIS WIKI IS GOING DOWN SHORTLY FOR AN UPGRADE. WILL BE DOWN FOR APPROX 3 HOURS
All current wiki content has been merged into pages at http://spark.apache.org as of November 2016. Each page links to the new location of its information on the Spark web site.
Obsolete wiki content is still hosted here, but carries a notice that it is no longer current.
In particular, release cadence information, formerly on this page, is now hosted at http://spark.apache.org/versioning-policy.html