Google has announced a new version of the Software Development Kit for its App Engine cloud platform, Google App Engine 1.4.SDK.
Google officials said this is the largest release of the year for the App Engine SDK, which includes new features such as the Channel API. The Channel API is a bi-directional channel for communicating directly with user browsers. This service lets applications push notifications directly to browsers and eliminates the need for polling.
In addition, App Engine SDK 1.4 also includes the new Always On feature, which enables developers to reserve three instances of their applications to run at all times regardless of load. And for $9 a month, Google will maintain three independent replicas of a developer's applications so that even applications with low or variable amounts of traffic can be confident that there are active instances at all times, the company said.