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Title: OSv  
Author: World Heritage Encyclopedia
Language: English
Subject: Operating system, OSV, List of products based on FreeBSD, Voice user interface, OS4000
Publisher: World Heritage Encyclopedia


Developer Cloudius Systems
Written in C++
Working state Alpha
Source model Open source
Initial release September 16, 2013 (2013-09-16)
Marketing target Cloud computing
Available in Multilingual
Update method ?
Platforms x86-64 using the KVM, Xen, VMware, and VirtualBox hypervisors. (arm64 on KVM is under development)
Kernel type Monolithic (OSv kernel)
Userland POSIX, Java, Ruby
Default user interface CLI, web
License BSD license (free software)

OSv (stylized OSv) is a cloud computing focused[1] computer operating system released on September 16, 2013. It is a special-purpose operating system built to run as a guest on top of a virtual machine, thus it does not include drivers for bare-metal hardware. It is a slim, bare bones unikernel including just the functionality necessary to run Java or POSIX applications.[2] For this reason, it does not support a notion of users (it's not a multiuser system) or processes - everything runs in the kernel address space.[3] Using a single address space removes some of the time-consuming operations associated with context switching.[4] It uses large amounts of code from the FreeBSD operating system, in particular the network stack and the ZFS file system. OSv can be managed using a REST Management API and an optional command line interface written in Lua.


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External links

  • Slides introducing the basic concept
  • Official website
  • GitHub project
  • OSv—Optimizing the Operating System for Virtual Machines -- paper presented at the USENIX Annual Technical Conference in 2014
  • Original announcement
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