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The Design and Implementation of a Log-structured file system (Paperback, Softcover reprint of the original 1st ed. 1995)
Loot Price: R2,746
Discovery Miles 27 460
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The Design and Implementation of a Log-structured file system (Paperback, Softcover reprint of the original 1st ed. 1995)
Series: The Springer International Series in Engineering and Computer Science, 303
Expected to ship within 10 - 15 working days
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Computersystemsresearch is heavilyinfluencedby
changesincomputertechnol- ogy. As technology changes alterthe
characteristics ofthe underlying hardware com- ponents of the
system, the algorithms used to manage the system need to be re-
examinedand newtechniques need to bedeveloped. Technological
influencesare par- ticularly evident in the design of storage
management systems such as disk storage managers and file systems.
The influences have been so pronounced that techniques developed as
recently as ten years ago are being made obsolete. The basic
problem for disk storage managers is the unbalanced scaling of
hard- warecomponenttechnologies. Disk storage managerdesign depends
on the technolo- gy for processors, main memory, and magnetic
disks. During the 1980s, processors and main memories benefited
from the rapid improvements in semiconductortechnol- ogy and
improved by several orders ofmagnitude in performance and capacity.
This improvement has not been matched by disk technology, which is
bounded by the me- chanics ofrotating magnetic media. Magnetic
disks ofthe 1980s have improved by a factor of 10in capacity
butonly a factor of2 in performance. This unbalanced scaling ofthe
hardware components challenges the disk storage manager to
compensate for the slower disks and allow performance to scale with
the processor and main memory technology. Unless the performance of
file systems can be improved over that of the disks, I/O-bound
applications will be unable to use the rapid improvements in
processor speeds to improve performance for computer users. Disk
storage managers must break this bottleneck and decouple
application perfor- mance from the disk.
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