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Solaris is a Unix operating system originally developed by Sun Microsystems. It superseded their earlier SunOS in 1993. Oracle Solaris, as it is named as of 2010, has been owned by Oracle Corporation since the Sun acquisition by Oracle in January 2010. Solaris is known for its scalability, especially on SPARC systems, and for originating many innovative features such as DTrace, ZFS and Time Slider. Solaris supports SPARC-based and x86-based workstations and servers from Oracle and other vendors, with efforts underway to port to additional platforms. Solaris is registered as compliant with the Single Unix Specification. Historically, Solaris was developed as proprietary software. In June 2005, Sun Microsystems released most of the codebase under the CDDL license, and founded the OpenSolaris open source project. With OpenSolaris, Sun wanted to build a developer and user community around the software. After the acquisition of Sun Microsystems in January 2010, Oracle decided to discontinue the OpenSolaris distribution and the development model. Ten days before the internal Oracle memo was released, the decision to discontinue the distribution was leaked, and Garrett D'Amore announced〔(【引用サイトリンク】 author = Illumos Project )〕 the illumos project, creating a fork of the Solaris kernel. In August 2010, Oracle discontinued providing public updates to the source code of the Solaris kernel, effectively turning Solaris 11 into a closed source proprietary operating system. However, through the Oracle Technology Network (OTN), industry partners can still gain access to the in-development Solaris source code.〔 Source code for the open source components of Solaris 11 is available for download from Oracle. ==History== In 1987, AT&T Corporation and Sun announced that they were collaborating on a project to merge the most popular Unix variants on the market at that time: BSD, System V, and Xenix. This became Unix System V Release 4 (SVR4). On September 4, 1991, Sun announced that it would replace its existing BSD-derived Unix, SunOS 4, with one based on SVR4. This was identified internally as SunOS 5, but a new marketing name was introduced at the same time: Solaris 2. Although SunOS 4.1.''x'' micro releases were retroactively named Solaris 1 by Sun, the Solaris name is used almost exclusively to refer to the SVR4-derived SunOS 5.0 and later. The justification for this new ''overbrand'' was that it encompassed not only SunOS, but also the OpenWindows graphical user interface and Open Network Computing (ONC) functionality. The SunOS minor version is included in the Solaris release number. For example, Solaris 2.4 incorporated SunOS 5.4. After Solaris 2.6, Sun dropped the ''2.'' from the number, so Solaris 7 incorporates SunOS 5.7, and the latest release SunOS 5.11 forms the core of ''Solaris 11.3''. Solaris originated on the SPARC. The first x86 port, of version 2.1, was originally intended by Sun as a desktop operating system for large businesses that would also use Solaris on their high-end server machines. It included the Wabi emulator to support Microsoft Windows applications. For smaller clients, Sun simultaneously maintained the Interactive Unix system that it had acquired from Interactive Systems Corporation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Solaris (operating system)」の詳細全文を読む スポンサード リンク
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