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'''OpenSolaris for System z''' was<ref name="dead">http://www.theregister.co.uk/2010/03/29/oracle_solaris_z_ibm_mainframe/</ref> a distribution of the [[OpenSolaris]] computer [[operating system]] designed to run on the [[IBM System z]] line of [[mainframe computers]]. '''OpenSolaris''' is an [[open source]] project created by [[Sun Microsystems]] to build a developer community around [[Solaris (operating system)|Solaris]] technology.
== History ==
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The port uses [[z/Architecture]] 64-bit addressing and therefore requires an [[IBM System z]] [[mainframe computers|mainframe]]. Because the port depends on recently defined z/Architecture processor instructions, it requires a [[System z9]] or later mainframe model and will not run on older machines. It also will not run on the release version of [[Hercules emulator|Hercules]] mainframe emulator, the needed changes are included in the SVN version 5470 of Hercules. It also requires the [[paravirtualization]] features provided by [[z/VM]]; it will not run on "bare metal" or in a logical partition ([[LPAR]]) without the z/VM hypervisor at Version 5.3 level or later. Also, because OpenSolaris uses a new network DIAGNOSE instruction, PTF VM64466 or VM64471 must be applied to z/VM to provide support for that instruction.<ref>{{cite web |url=http://www.sinenomine.net/opensolaris |title=OpenSolaris for System z |accessdate=2008-10-16}}</ref> On November 18, 2008, [[IBM]] authorized the use of [[Integrated Facility for Linux|IFL]] processors to run OpenSolaris for System z workloads.<ref>{{cite web |url=http://www-01.ibm.com/common/ssi/rep_ca/5/897/ENUS108-875/ENUS108-875.PDF |title=Integrated Facility for Linux (IFL) authorization is expanded to include the OpenSolaris operating system |date=2008-11-18 |accessdate=2008-11-19 }}</ref>
[[The Register]] reported in March 2010 an email from an insider saying that:<ref name="dead"/>
{{quote|The SystemZ port of Solaris is dead. Oracle pulled all plugs and refused to further help the authors to help. Critical parts are closed parts of libc.so.1, the core user land library which has closed source parts. Oracle now refuses to give precompiled binaries of newer versions of the closed parts to the SystemZ port community, effectively ending this port because the missing bits cannot be replicated or bypassed.}}
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