Storage and Indexes
Introduction to Databases
Computer Science 557
Instructor: Joe Bockhorst
University of Wisconsin - Milwaukee
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Storage and Indexes-Introduction to Databases-Tutorial 14-Computer Science, Study Guides, Projects, Research of Introduction to Database Management Systems
Storage and Indexes, Hard Disks, Anatomy of a Hard Disk, Single Sided Hard Disk, Disk Pack, Track, Actuator, Arm, Read Write Head, Spindle Disk Rotation, Cylinder of Tracks, Actuator Movement, Introduction to Databases, Joe Bockhorst, Tutorial, Computer Science, University of Wisconsin, United States of America
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2011/2012
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Storage and Indexes
Introduction to DatabasesComputer Science 557
Instructor: Joe Bockhorst
University of Wisconsin - Milwaukee
Hard Disks
•^
DBMS typically store information on “hard” disks
-^
I/O operations (“Read” and “Write”) are costly–^
Should be planned carefully
-^
A block is amount of data transferred in oneoperation (example block size ~ 1024 bytes)
Disk
Main Memory
(RAM)
Read Write