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Retrieval performance vesus disc space utilization on worm optical discs

Christodoulakis Stavros, Daniel Alexander Ford

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/EAB887C8-1BF6-4116-885D-6F2B8B811DB6-
Αναγνωριστικόhttps://doi.org/10.1145/66926.66955-
Γλώσσαen-
Μέγεθος8 pagesen
Τίτλος Retrieval performance vesus disc space utilization on worm optical discsen
ΔημιουργόςChristodoulakis Stavrosen
ΔημιουργόςΧριστοδουλακης Σταυροςel
ΔημιουργόςDaniel Alexander Forden
ΠερίληψηSteady progress in the development of optical disc technology over the past decade has brought it to the point where it is beginning to compete directly with magnetic disc technology. WORM optical discs in particular, which permanently register information on the disc surface, have significant advantages over magnetic technology for applications that are mainly archival in nature but require the ability to do frequent on-line insertions.In this paper, we propose a class of access methods that use rewritable storage for the temporary buffering of insertions to data sets stored on WORM optical discs and we examine the relationship between the retrieval performance from WORM optical discs and the utilization of disc storage space when one of these organizations is employed. We describe the performance trade off as one of fast sequential retrieval of the contents of a block versus wasted space owing to data replication. A model of a specific instance of such an organization (a buffered hash file scheme) is described that allows for the specification of retrieval performance objectives. Alternative strategies for managing data replication that allow trade offs between higher consumption rates and better average retrieval performance are also described. We then provide an expected value analysis of the amount of disc space that must be consumed on a WORM disc to meet specified performance limits. The analysis is general enough to allow easy extension to other types of buffered files systems for WORM optical discs. en
ΤύποςΠλήρης Δημοσίευση σε Συνέδριοel
ΤύποςConference Full Paperen
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-10-05-
Ημερομηνία Δημοσίευσης1989-
Θεματική ΚατηγορίαAutomatic computersen
Θεματική ΚατηγορίαAutomatic data processorsen
Θεματική ΚατηγορίαComputer hardwareen
Θεματική ΚατηγορίαComputing machines (Computers)en
Θεματική ΚατηγορίαElectronic brainsen
Θεματική ΚατηγορίαElectronic calculating-machinesen
Θεματική ΚατηγορίαElectronic computersen
Θεματική ΚατηγορίαHardware, Computeren
Θεματική Κατηγορίαcomputersen
Θεματική Κατηγορίαautomatic computersen
Θεματική Κατηγορίαautomatic data processorsen
Θεματική Κατηγορίαcomputer hardwareen
Θεματική Κατηγορίαcomputing machines computersen
Θεματική Κατηγορίαelectronic brainsen
Θεματική Κατηγορίαelectronic calculating machinesen
Θεματική Κατηγορίαelectronic computersen
Θεματική Κατηγορίαhardware computeren
Βιβλιογραφική ΑναφοράS. Christodoulakis. D.A. Ford ,"Retrieval performance vesus disc space utilization on worm optical discs ",in 1989 ACM SIGMOD Intern.l Conf. on Manag. of Data ,pp. 306-314 .doi :10.1145/66926.66955 en

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