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11. Storage and File Structure in DBMS

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Chapter 11: Storage and File Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Classification of Physical Storage Media ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Physical Storage Media ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Physical Storage Media (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Physical Storage Media (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Physical Storage Media (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Physical Storage Media (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Storage Hierarchy
Storage Hierarchy (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Magnetic Hard Disk Mechanism NOTE: Diagram is schematic, and simplifies the structure of actual disk drives
Magnetic Disks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Magnetic Disks (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disk Subsystem ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Performance Measures of Disks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Performance Measures (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Optimization of Disk-Block Access ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Optimization of Disk Block Access (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Optimization of Disk Block Access (Cont.)
RAID ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Improvement of Reliability via Redundancy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Improvement in Performance via Parallelism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID Levels ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID Levels (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object]
RAID Levels (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID Levels (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
RAID Levels (Cont.) ,[object Object],[object Object]
RAID Levels (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Choice of RAID Level ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Choice of RAID Level (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Issues ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Issues (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Optical Disks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Magnetic Tapes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Storage Access ,[object Object],[object Object],[object Object],[object Object]
Buffer Manager ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Buffer-Replacement Policies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Buffer-Replacement Policies (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
File Organization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fixed-Length Records ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Free Lists ,[object Object],[object Object],[object Object],[object Object]
Variable-Length Records ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Variable-Length Records: Slotted Page Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Variable-Length Records (Cont.) ,[object Object],[object Object],[object Object],[object Object]
Pointer Method ,[object Object],[object Object],[object Object]
Pointer Method (Cont.) ,[object Object],[object Object],[object Object],[object Object]
Organization of Records in Files ,[object Object],[object Object],[object Object],[object Object],[object Object]
Sequential File Organization ,[object Object],[object Object]
Sequential File Organization (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Clustering File Organization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Data Dictionary Storage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data dictionary (also called system catalog ) stores metadata : that is, data about data, such as
Data Dictionary Storage (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],Relation-metadata = ( relation-name , number-of-attributes, storage-organization, location) Attribute-metadata = ( attribute-name, relation-name , domain-type, position, length) User-metadata = ( user-name , encrypted-password, group) Index-metadata = ( index-name, relation-name , index-type, index-attributes) View-metadata = ( view-name , definition)
Mapping of Objects to Files ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mapping of Objects to Files (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Management of Persistent Pointers ,[object Object]
Management of Persistent Pointers (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Swizzling ,[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Swizzling ,[object Object],[object Object],[object Object],[object Object]
Hardware Swizzling (Cont.) ,[object Object]
Hardware Swizzling (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Swizzling (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Hardware Swizzling (Cont.) ,[object Object],[object Object],Page image after swizzling
Hardware Swizzling (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disk versus Memory Structure of Objects ,[object Object],[object Object],[object Object],[object Object],[object Object]
Large Objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Modifying Large Objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
End of Chapter
File Containing account Records
File of Figure 11.6, with Record 2 Deleted and All Records Moved
File of Figure 11.6, With Record 2 deleted and Final Record Moved
Byte-String Representation of Variable-Length Records
Clustering File Structure
Clustering File Structure With Pointer Chains
The depositor Relation
The customer Relation
Clustering File Structure
 

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11. Storage and File Structure in DBMS