Open Source successor of OpenSolaris

illumos is a fully open-source effort to produce a reliable, performant, and scalable operating system with innovative technologies and tools. We bring together a passionate community of developers and a growing base of commercial participants (Delphix, Joyent, Nexenta, OmniTI, and others).

illumos is the successor to Sun Microsystems' OpenSolaris project. Our culture draws heavily on the qualities that distinguished Sun engineering culture: systems engineering (component, interaction, and interface design with a strong commitment to minimalism), architectural coherence (design cooperation across subsystems), measurement-driven development (strong visibility tools, mature methodologies for their use, embedding both thoroughly in the development process). We have adapted it to work beyond the framework of a single corporate entity via federated efforts of individuals and companies with distinct interests in the technology (cloud infrastructure, storage systems, application servers, and others), sharing an interest in commodity hardware and production-driven innovation.

illumos features an unparalleled combination of technologies, including the resilient ZFS storage system, production-safe dynamic tracing (DTrace), FMA predictive self-healing, the Service Management Framework for persistent process and boot management, zones for lightweight isolation and virtualisation, the KVM hypervisor for full system virtualisation, Crossbow for virtualised networks, a high-performance kernel CIFS/SMB client and server, boot environments for safe upgrades, and the MDB kernel and application debugger. All of these subsystems are actively developed by the illumos project. Both ZFS and DTrace have been ported beyond illumos (notably to FreeBSD, OS X, and Linux), where our community and sister OpenZFS community have taken a leading role in coordinating new feature development across platforms, serving as a reference platform and repository

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