December 02, 2010, 5:42 PM — Google will upgrade on Thursday its Google App Engine cloud platform and its software development kit, adding capabilities for real-time communications and increased data replication.
[ See also: "Google App Engine violates stateless nature of Web" ]
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For high availability in enterprise or SaaS applications, a High Replication Datastore capability expands replication capabilities. As many as four copies of data can be maintained instead of the current two datastore limit. Performance will be a bit slower, and this service costs a little more as an add-on, Google said. Pricing details will be made available when High Replication Datastore is generally available in about a month.
App Engine 1.4.0's improved task cue capability, meanwhile, expands the time that services like indexing and processing can be run. "You have a lot more leeway into running long-running tasks in the background," said Lynch. The previous limit of 30 seconds for background tasks has been expanded to 10 minutes. Also, the size of URLFetch requests, in which an application can request something like an image from another website, has been expanded from 1MB to 32MB.