User Guide

SAP AG November 2002
Log Entry .......................................................................................................................... 44
Redo Log Entry............................................................................................................. 44
Undo Log Entry............................................................................................................. 44
Online Logging ................................................................................................................. 44
Redo Log Management ................................................................................................ 45
Log Queue ................................................................................................................ 45
Log Page................................................................................................................... 46
Log Writer.................................................................................................................. 46
Log Area.................................................................................................................... 47
Undo Log Management ................................................................................................ 47
Undo Log File............................................................................................................ 48
History Management..................................................................................................... 48
History File ................................................................................................................ 48
History List ................................................................................................................ 49
Garbage Collector ..................................................................................................... 49
Restart or Recovery ......................................................................................................... 49
Redo Log Manager ....................................................................................................... 49
Log Reader ................................................................................................................... 50
Redo Log File ............................................................................................................... 50
Redo List....................................................................................................................... 51
Redo Task..................................................................................................................... 51
Savepoint on Restart .................................................................................................... 52
Example: Restart .......................................................................................................... 52
Database Tools.................................................................................................................... 53
Architecture of the SAP DB Tools .................................................................................... 53
Architecture of the Database Manager......................................................................... 54
Architecture of the SAP DB Loader .............................................................................. 55
SQL Studio Architecture ............................................................................................... 56
Architecture of the SAP DB Web Tools ........................................................................ 57
X Server ........................................................................................................................ 58
DBM Server .................................................................................................................. 58
Loader........................................................................................................................... 59
Web Server................................................................................................................... 59
Database Manager........................................................................................................... 59
Database Manager GUI................................................................................................ 60
Options (DBMGUI) .................................................................................................... 60
Database Manager CLI................................................................................................. 61
Options (DBMCLI)..................................................................................................... 61
DBM Commands....................................................................................................... 62
Web DBM...................................................................................................................... 62
User Manual: SAP DB 6