Watch out, Docker! You’re no longer the only container-based virtualization technology on the block — spurred by the sudden success of Docker, platform services provider Joyent and Linux distributor Canonical have each open-sourced their container technologies.

Joyent’s collection of container technologies could be used as the basis for running large-scale, big-data analysis jobs, and Canonical’s new container comes with additional safety measures for mission-critical workloads, according to each company.

Earlier this week, Google announced that it would be providing software to run Docker containers on its cloud services. It was the latest win for the rapidly ascending Docker, which is now the dominant container technology on the market. Containers are lighter and faster alternatives than the full virtual machine hypervisors offered by VMware, Citrix and Microsoft. Google uses the containers to run its cloud services.

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