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VulcanSphere (talk | contribs) Adding short description: "Aspect of Unisys OS 2200 operating system" (Shortdesc helper) |
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{{Short description|Aspect of Unisys OS 2200 operating system}}
The [[Unisys OS 2200 operating system|OS 2200]] database managers are all part of the Universal Data System (UDS). UDS provides a common control structure for multiple different data models. Flat files (sequential, multi-keyed indexed sequential – MSAM, and fixed-block),<ref>Unisys Corporation (2010). <u>Shared File System (SFS 2200) Administration and Support Reference Manual</u>. (Unisys publication 7831 0786). Roseville, MN. http://public.support.unisys.com/2200/docs/cp14.0/pdf/78310786-003.pdf</ref> [[Network model|network]] (DMS),<ref>Unisys Corporation (2010). <u>Data Management System (DMS 2200) Schema Data Definition Language (DDL) Administration, Operations, and Programming Guide</u>. (Unisys publication 7831 0745). Roseville, MN. http://public.support.unisys.com/2200/docs/cp14.0/pdf/78310745-005.pdf</ref> and [[Relational database|relational]] (RDMS)<ref>Unisys Corporation (2010). <u>Relational Data Management System (RDMS 2200) and IPF SQL Interface End Use Guide</u>. (Unisys publication 7831 0778). Roseville, MN. http://public.support.unisys.com/2200/docs/cp14.0/pdf/78310778-003.pdf</ref> data models all share a common locking, recovery, and clustering mechanism. OS 2200 applications can use any mixtures of these data models along with the high-volume transaction file system<ref>Unisys Corporation (2012). <u>Transaction Processing Conceptual Overview</u>. (Unisys publication 7830 9960). Roseville, MN. http://public.support.unisys.com/2200/docs/cp14.0/pdf/78309960-004.pdf</ref> within the same program while retaining a single common recovery mechanism.<ref>Unisys Corporation (2013). <u>Universal Data System Administration and Support Reference Manual</u>. (Unisys publication 7831 0737). Roseville, MN. http://public.support.unisys.com/2200/docs/cp14.0/pdf/78310737-021.pdf</ref>
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