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Resumen del manual
Appending to the End of a File............................................................................................66
6 Key-Sequenced Files.................................................................................68
Enscribe Key-Sequenced Files...................................................................................................68
Applicable System Procedures..................................................................................................68
Types of Access......................................................................................................................69
Key-Sequenced Tree Structure...................................................................................................69
Unique Features of EKS Files....................................................................................................70
Creating Key-Sequenced Files...................................................................................................71
Comparing LKS Files, LKS2 Files, Standard Queue Files, EKS Files, and EKS Files with Increased
Limits................................................................................................................................71
Converting a Legacy Key-Sequenced File to an Enhanced Key-Sequenced File............................72
Logical Records.................................................................................................................73
Blocks..............................................................................................................................74
Disk Extent Size.................................................................................................................74
Primary Keys.....................................................................................................................75
Key Compression...............................................................................................................75
Index Compaction..............................................................................................................76
File Creation Examples.......................................................................................................76
Accessing Key-Sequenced Files.................................................................................................85
End-of-File (EOF) Pointer......................................................................................................85
Sequential Access..............................................................................................................86
Random Access.................................................................................................................86
Inserting Records...............................................................................................................86
Deleting Records................................................................................................................87
Current Primary-Key Value...................................................................................................87
Access Examples...............................................................................................................87
7 Queue Files...........................................................................................107
Enscribe Queue Files.............................................................................................................107
Applicable System Procedures................................................................................................107
Types of Access....................................................................................................................108
Queue File Structure..............................................................................................................108
Primary Keys...................................................................................................................108
Creating Queue Files............................................................................................................108
Queue File Examples........................................................................................................109
Accessing Queue Files..........................................................................................................110
Specifying Sync-Depth......................................................................................................111
Queuing a Record...........................................................................................................111
Dequeuing a Record........................................................................................................111
Examining a Record.........................................................................................................114
Dequeuing With Positioning..............................................................................................114
Using the Current Key.......................................................................................................116
Specifying Timeout Periods................................................................................................117
Locking a Record.............................................................................................................117
Network Considerations...................................................................................................117
Performance Considerations..............................................................................................117
Access Examples.............................................................................................................118
Communication Path Errors....................................................................................................121
8 Entry-Sequenced Files..............................................................................123
Enscribe Entry-Sequenced Files...............................................................................................123
Applicable System Procedures................................................................................................123
Types of Access....................................................................................................................123
Creating Entry-Sequenced Files...............................................................................................124
Logical Records...............................................................................................................124
Contents
5
...Otros modelos de este manual:
Computadoras - HP NonStop G-Series (1.67 mb)
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