|Source model||Open source|
|Initial release||September 16, 2013|
|Marketing target||Cloud computing|
|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 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. 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. Using a single address space removes some of the time-consuming operations associated with context switching. It uses large amounts of code from the FreeBSD operating system, in particular the network stack and the ZFS file system. It is managed through REST Management API and optional CLI written in Lua.
- Kurth, Lars (3 December 2013). "Are Cloud Operating Systems the Next Big Thing?". linux.com. Retrieved 5 December 2013.
- Madhavapeddy, Anil, and David J. Scott (12 January 2014). "Unikernels: Rise of the Virtual Library Operating System". ACM Queue. Retrieved 20 May 2014.
- [dead link]Buys, Jon (18 September 2013). "Cloudius Systems Announced OSv, an Operating System for the Cloud". OStatic. Retrieved 11 March 2014.
- Corbet, Jonathan (18 September 2013). "Rethinking the guest operating system". LWN.net. Retrieved 28 September 2013.
- 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