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・ neutrosophic
・ neutrosophic logic
・ neutrosophic probability
・ neutrosophic set
・ neutrosophic statistics
・ neutrosophy
・ never offline
・ new flavors
・ new jersey
・ new programming language
new storage system
・ new talk
・ new testament
・ new york state educational reasearch etwork
・ new york university
・ newbie
・ newgroup wars
・ newline
・ newp
・ news


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new storage system : FOLDOC
New Storage System
(NSS) A major Multics implementation project during the 1970s. The initial Multics file system design had evolved from the one-huge-disk world of CTSS. When multiple disk units were used they were just assigned increasing ranges of disk addresses, so a segment could have pages scattered over all disks on the system. This provided good I/O parallelism but made {crash recovery} expensive. NSS redesigned the lower levels of the file system, introducing the concepts of {logical volume} and {physical volume} and a mapping from a Multics directory branch to a VTOC entry for each file. The new system had much better recovery performance in exchange for a small space and performance cost.
(1997-01-29)



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