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Storage and Data Structures - Coggle Diagram
Storage and Data Structures
Physical Storage Media
Cache
Main Memory
Flash Memory
Magnetic Disc Storage
Optics Storage
Tape storage
RAID
Improved reliability through redundancy.
Improved performance through parallelism.
RAID levels.
level one
level two
level three
level four
level five
level six
Choosing the right RAID level.
Extra economic cost of disk storage requirements.
Performance requirements in terms of the number of I/O operations.
Performance when a disk fails.
Performance during rebuild
Hardware aspects.
Other RAID Applications.
Conjuntos de cintas.
Transmisión de datos por sistemas de radio.
Files Organization
Fixed length records.
Variable Length Records
Representation in byte strings.
Fixed length representation.
Reserved space.
Representation with lists.
Storage With Data Dictionaries
Types of information that the system must store
The names of the relationships.
The names of the attributes of each relation.
The domains and lengths of the attributes.
The names of the views defined in the database data and the definitions of those views.
Integrity constraints.
Storage for Orientated Object Data Bases
-Large objects
Sound and video data.
Graphic data.
Sound and video data.
-Structure of objects on disk or in memory
-Hardware rescue.
optimizations
Pointer dereference
Pointer rescue on a page
Pointer Representation
-Management of persistent pointers.
-Implementation of object identifiers.
-Correspondence of objects with files.
Magnetic Discs
Block access optimization of the disk
Historical record disc.
Non-volatile write buffer.
File organization.
Planning.
Disk Performance Measurements
main measures
reliability
data transfer speed
access time
capacity
Physical characteristics of the disks
Register Organization in File
Ways of organization
Heap file organization.
Organization of sequential files.
Associative organization (hashing) of files
Organization of sequential files.
Organization of files in groups.
Tertiary Storage
Optical Discs.
magnetic tapes.
Storage Access
Buffer manager.
Policies for buffer replacement.