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英特尔大学进修课程 - 大资料库介绍 Teradata Data Warehouse L2 L3 metadata model
Confidential
m
a
e iDWB – Intel Data Warehouse Builder
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s t Infrastructure tools release – Q4’04
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n L2/L3 Metadata model
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C Enhancements coming
Slide 1 in WW42 – WW45’04
11/18/2013
Confidential
m Agenda
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e Why L2/L3 metadata ?
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n t Benefit
o n
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u Lowlight
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o m
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e p Main features
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e e Model at a glance
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e e Working at a glance
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s y Timelines
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i l Questions ?
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B a Backup
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Slide 2
11/18/2013
Confidential
m Why L2/L3 Metadata ?
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e • Problem Statement
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s
n t - Most of the L2/L3 tables are getting loaded even though the
o n
i source tables are not being changed. The collect statistics
t e
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l and copy back into inactive database (where ever dual DB
o m approach is used) are being done for all L2/L3 tables.
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e p
c o - Different subject areas came out with customized
n l approaches to handle the situations. No standard approach.
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g Dependent subject areas are finding difficulties in adopting
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l v
l multiple adhoc approaches.
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n - No tool for maintaining and migrating the metadata for adhoc
I D
s y approaches. BTEQ/SQL scripts
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