ASM Metadata and Internals.ppt
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CERN - IT Department
CH-1211 Genève 23
Switzerland
www.cern.ch/it
A Closer Look inside
Oracle ASM
UKOUG Conference 2007
Luca Canali, CERN IT
LCG
CERN - IT Department
CH-1211 Genève 23
Switzerland
www.cern.ch/it
Inside Oracle ASM, UKOUG Dec 2007 - 2
Outline
•
Oracle ASM for DBAs
–
Introduction and motivations
•
ASM is not a black box
–
Investigation of ASM internals
–
Focus on practical methods and troubleshooting
•
ASM and VLDB
–
Metadata, rebalancing and performance
•
Lessons learned from CERN’s production
DB services
CERN - IT Department
CH-1211 Genève 23
Switzerland
www.cern.ch/it
Inside Oracle ASM, UKOUG Dec 2007 - 3
ASM
•
Oracle Automatic Storage Management
–
Provides the functionality of a volume manager
and filesystem for Oracle (DB) files
•
Works with RAC
–
Oracle 10g feature aimed at simplifying storage
management
•
Together with Oracle Managed Files and the Flash
Recovery Area
–
An implementation of S.A.M.E. methodology
•
Goal of increasing performance and reducing cost
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