November 2001
Intermediate to advanced
158 pages
5h 10m
English
Content preview from IBM ESS and IBM DB2 UDB Working Together
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112 IBM ESS and IBM DB2 UDB Working Together
Figure A-3 Large versus small logical disks elapsed tablescan times
Vertical versus horizontal placement — 36 arrays
The following discussion presents a relevant question, and then offers our test design and
results.
Question
What is the impact of 'vertical' vs. 'horizontal' layout of containers across ESS logical disks for
DB2 UDB EEE? For our purposes, vertical layout means that each data partition had
exclusive use of a subset of the total number of arrays (that is, arrays were not shared). A
horizontal layout would mean that each data partition used all arrays (that is, arrays were
shared).
If the ...
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