Titlebook: Recovery in Parallel Database Systems; Svein-Olaf Hvasshovd Book 1999Latest edition Springer Fachmedien Wiesbaden 1999 Datenanalyse.Datena

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https://doi.org/10.1007/978-3-322-91534-4Datenanalyse; Datenapplikationen; Datenbanken; Datenbankmanagement; Datenprozesse; Verteilerstrategien; re

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IntroductionThe following chapters describe the recovery strategies developed to meet those of the HypRa recovery requirements not met by the existing recovery approaches: very high transaction service availability and soft real-time transaction response.

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The HypRa DBMS Server Software DesignA HypRa DBMS server is organised as a . utilising the particular attributes of the HypRa internode communication network (see sections A.2 and 9.6). The services provided by the HypRa DBMS server are according to the ISO-SQL standard ([IS089]). The distributed HypRa DBMS is organised as a server group with a . at each HypRa node.

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The Log Distribution StrategyThis chapter presents the log distribution strategy. The log distribution strategy determines how the log is fragmented, replicated, and allocated to nodes. It also determines the log record identification policies and the tuple identification policy.

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The Neighbour Write-Ahead Logging StrategyThis chapter presents the neighbour write-ahead logging (.) strategy. The nWAL strategy determines how stable log storage can be obtained by logging in the main memory of nodes located in different disaster units.