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Top/Computers/Software/Operating Systems/Persistent |
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Persistent : |
| Persistence is the trait of maintaining system state despite discontinuities in operation or use, such as from one use of a program to the next use. In simple terms, persistent programs lose no, or little, information if the system becomes inoperative suddenly. As most computer users know, many computers often become inoperative suddenly, for two main reasons: the electric power stops, or a program crashes.
Persistent operating systems (OSs) are OSs that maintain global persistence for all threads, processes, and programs that are running, as they run.
When using persistent OSs, if the plug is pulled out suddenly, and the screen goes black, the computer can be plugged back in, and is up and running again quickly, almost exactly where it left off, losing no, or little (at most only a few seconds) work. Clearly, this demands some effort by designers, but is not difficult if one is willing to suffer a small performance loss. The difficulty lies in designing programs that are persistent with no performance lose. |
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7 web sites matced for Persistent |
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Persistent Operating Systems
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Short, annotated, alphabetically sorted list and links, part of larger system.
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Persistent Programming Research Group
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Web server in the School of Computer Science, St. Andrews University. Includes search by topic publications index.
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Forest Project
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Investigated using persistent object technology in building large-scale software development environments. In time, became more about developing persistent object technology; broadened scope to provide support for all Java applications that manage long-lived, large-scale, complex, shared data.
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Architecture of the PEVM: A High-Performance Orthogonally Persistent Java Virtual Machine
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Describes design, implementation of new scalable, high performance implementation of orthogonal persistence for Java platform (OPJ). Based on Sun Microsystems Labs Virtual Machine for Research (ResearchVM); features: optimizing Just-In-Time compiler, exact generational garbage collection, fast thread synchronization.
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TUNES: Orthogonal Persistence
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A Persistent System in Real Use: Experiences of the First 13 Years
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Eumel and successor L3, OSs made by GMD, have been used for 13 and 4 years respectively, for production in business, education. Over 2000 Eumel, 500 L3 have shipped since 1979, 1988. Both rely on persistence, with fault-surviving. Description, links. [ResearchIndex, CiteSeer]
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Persistent Programming Research Group
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School of Computer Science.
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