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Asymmetric Memory Hierarchies.

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Bibliographic Details
Title: Asymmetric Memory Hierarchies.
Authors: Williams, John G.1, Bell, G.
Source: Communications of the ACM. Apr1973, Vol. 16 Issue 4, p213-222. 10p. 4 Diagrams, 1 Chart, 1 Graph.
Subjects: Memory hierarchy (Computer science), Computer storage devices, Computer peripherals, Information storage & retrieval systems, Computer systems, Electronic equipment
Abstract: A study is presented of some of the system implications of memory hierarchies in which the backing or secondary store has a very small read time, relative to both the time required for writing and to the read time of conventional backing storage devices. Several analytic models are introduced, and it is shown that such hierarchies may operate in ways which differ from those of more conventional hierarchies. In particular, it is shown that it may not be necessary to multiprogram in such a situation. In the past, backing storage devices have been roughly symmetric with respect to their read and write times. This situation may not continue, as several devices are currently under development which may have a very small read-time/write-time ratio. This study places particular emphasis on one such system—the RCA read/write holographic optical memory. [ABSTRACT FROM AUTHOR]
Copyright of Communications of the ACM is the property of Association for Computing Machinery and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: Asymmetric Memory Hierarchies.
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  Data: <searchLink fieldCode="JN" term="%22Communications+of+the+ACM%22">Communications of the ACM</searchLink>. Apr1973, Vol. 16 Issue 4, p213-222. 10p. 4 Diagrams, 1 Chart, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Memory+hierarchy+%28Computer+science%29%22">Memory hierarchy (Computer science)</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+storage+devices%22">Computer storage devices</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+peripherals%22">Computer peripherals</searchLink><br /><searchLink fieldCode="DE" term="%22Information+storage+%26+retrieval+systems%22">Information storage & retrieval systems</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+systems%22">Computer systems</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+equipment%22">Electronic equipment</searchLink>
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  Data: A study is presented of some of the system implications of memory hierarchies in which the backing or secondary store has a very small read time, relative to both the time required for writing and to the read time of conventional backing storage devices. Several analytic models are introduced, and it is shown that such hierarchies may operate in ways which differ from those of more conventional hierarchies. In particular, it is shown that it may not be necessary to multiprogram in such a situation. In the past, backing storage devices have been roughly symmetric with respect to their read and write times. This situation may not continue, as several devices are currently under development which may have a very small read-time/write-time ratio. This study places particular emphasis on one such system—the RCA read/write holographic optical memory. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Communications of the ACM is the property of Association for Computing Machinery and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1145/362003.362010
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        Text: English
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        PageCount: 10
        StartPage: 213
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      – SubjectFull: Memory hierarchy (Computer science)
        Type: general
      – SubjectFull: Computer storage devices
        Type: general
      – SubjectFull: Computer peripherals
        Type: general
      – SubjectFull: Information storage & retrieval systems
        Type: general
      – SubjectFull: Computer systems
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      – SubjectFull: Electronic equipment
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              Text: Apr1973
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              Y: 1973
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