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8 - Distributed Systems

M cheung william tan and carson woo integrates

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Unformatted text preview: twork file BUSI 335 Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo – integrates different types of DBMS’s over a network (vendors have yet to fully achieve this) 11 BUSI 335 Copyright © 2009-10 Y.M. Cheung, William Tan and Carson Woo 12 Horizontal Fragmentation Fragmentation Data Fragmentation Data Fragmentation • Example: Customers table may contain • Strategies for partitioning a database thousands thousands of records – each fragment is stored on one or more computers – a central distributed data catalog tells the application where to find the data it needs – Fragment #1: Canadian customers – Fragment #2: Mexican customers #2 • Horizontal fragmentation – division of tables into sets of rows – each fragment has unique rows which have the same attributes (columns) • Vertical fragmentation Vertical fragmentation – division of tables into sets of columns – each fragment has unique columns except the prim...
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