Mesosphere, a company that offers a datacenter operating system (DCOS), has raised $36 million in Series B funding. New investor Khosla Ventures led the round, with additional investments from Andreessen Horowitz, Fuel Capital, SV Angel and others. The B round brings Mesosphere’s total funding to approximately $50 million.

With a DCOS, developers and operators don’t need to focus on individual virtual or physical machines but can build and deploy applications and services that span entire datacenters, says Meosphere. Mesosphere’s DCOS, built on Apache Mesos, provides developers an API to automate allocation and deallocation of datacenter resources to run distributed applications, like Apache Spark, Apache Cassandra and Google’s Kubernetes (all natively supported by Mesosphere DCOS). The Mesosphere DCOS supports Linux applications and runs with Amazon AWS, Google GCE, Digital Ocean, Microsoft Azure, Rackspace, VMware vCloud Air. The Mesosphere DCOS also runs on-premise on bare metal or on top of a virtualized private cloud, such as with VMware or OpenStack.

In June 2014, Mesosphere closed $10.5M in series A funding led by Andreessen Horowitz, with additional investors Data Collective and Fuel Capital.

The Mesosphere DCOS is expected to be available in early 2015.

[Image courtesy: Meosphere]