Lecture4-1

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Unformatted text preview: ata Management L23.15 Spring 2013 L23.16 November 5th, 2012 CS480 Principles of Data Management GFS has a relaxed consistency model Spring 2013 Inconsistent and undefined OperaIon A •  Consistent: See the same data –  On all replicas •  Defined: If it is consistent AND OperaIon B –  Clients see mutaIon writes in its en%rety November 5th, 2012 L23.17 2/10/13 Colorado State University, Sangmi Pallickara 18 3 2/11/13 CS480 Principles of Data Management Spring 2013 CS480 Principles of Data Management Consistent but undefined Spring 2013 Defined OperaIon A OperaIon A OperaIon B OperaIon B 19 Colorado State University, Sangmi Pallickara 2/10/13 CS480 Principles of Data Management Spring 2013 File state region after a mutation Write Consistent but undefined Failure defined interspersed with inconsistent –  If the chunkserver was down Inconsistent L23.21 November 5th, 2012 CS480 Principles of Data Management Spring 2013 •  Applying mutaIons to a chunk in the same order on all its replicas •  Using chunk version numbers to...
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This note was uploaded on 02/11/2014 for the course CS 480 taught by Professor Staff during the Spring '08 term at Colorado State.

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