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TrueNAS (formerly FreeNAS) is a family of network-attached storage (NAS) products produced by iXsystems, incorporating both open-source and commercial software. Based on the OpenZFS file system, TrueNAS runs on FreeBSD as well as Linux and is available under the BSD License .
TrueNAS CORE and Enterprise (formerly known as FreeNAS [2]), is based on FreeBSD ; however TrueNAS Scale, alternative of both TrueNAS Core/Entreprise, is based on Debian Gnu/Linux. TrueOS – discontinued FreeBSD distribution aimed at the server market, previously a desktop distribution, abandoned to focus on TrueNAS Core. [5]
A version of TrueNAS by iXsystems, based on Debian Linux. As with TrueNAS Core (based on FreeBSD), it uses OpenZFS for storage and adds a variety of additional features. These include expanded device driver support, KVM virtual machines, PCIe passthrough and container support via Kubernetes and Docker.
ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 2009–2010.
Name Guest OS SMP available Runs arbitrary OS Supported guest OS drivers Method of operation Typical use Speed relative to host OS Commercial support available Containers, or Zones
Much of FreeBSD's codebase has become an integral part of other operating systems such as Darwin (the basis for macOS, iOS, iPadOS, watchOS, and tvOS), TrueNAS (an open-source NAS/SAN operating system), and the system software for the PlayStation 3 [98] and PlayStation 4 game consoles.
Docker on macOS uses a bhyve derivative called HyperKit.It is derived from xhyve, a port of bhyve to macOS's Hypervisor framework. [10]iohyve on FreeBSD is a command-line utility to create, store, manage, and launch bhyve guests using built in FreeBSD features.
Because file size references are stored in eight instead of four bytes, the file size limit has increased to 16 exabytes (EB) (2 64 − 1 bytes, or about 10 19 bytes, which is otherwise limited by a maximum volume size of 128 PB, [nb 2] or 2 57 − 1 bytes), raised from 4 GB (2 32 − 1 bytes) in a standard FAT32 file system. [1]