These real-time applications, according to Donna Dillenberger, a distinguished engineer at IBM’s Watson lab, can be done in a mainframe environment. They are not yet possible on clusters of smaller, industry-standard computers, she said. But there are several open-source software projects, like Apache Spark, that focus on real-time data processing across large numbers of computers.

via IBM Introduces z13, a Mainframe for the Smartphone Economy – NYTimes.com.

He estimates the total cost of ownership including hardware, software and labor will be 50 percent less with a mainframe than on his “sprawling server farm,” given the growing complexity of managing hardware and software from several suppliers.