HPlogo ALLBASE/SQL Database Administration Guide: HP 3000 MPE/iX Computer Systems > Appendix F SQLUtil

ADDLOG

» 

Technical documentation

Complete book in PDF
» Feedback

 » Table of Contents

 » Index

Adds a new log file to the DBEnvironment.

Scope

SQLUtil Only

SQLUtil Syntax

>> ADDLOG DBEnvironment Name: DBEnvironmentName Maintenance Word: MaintenanceWord Enter Log File Name(s) Separated by a Blank? LogFileName1 [LogFileName2] New Log File Size? FileSize Add Log File (y/n)? { Y [es] N [o]}

Parameters

DBEnvironmentName

is the name of a DBEnvironment.

MaintenanceWord

is the Maintenance Word.

LogFileName1, LogFileName2

is the physical (MPE/iX) name of the log file that is to be added. LogFileName2 is included only if you are using dual logging.

FileSize

is the size of the new log file.

Description

  • This command starts a DBEnvironment session, and lets you add one new log file. The DBEnvironment can be in use when this command is executed.

  • The new file is added in the same account as the DBECon file. You can specify a different group name. If you specify an account name, it must be the same as that of the DBECon file.

  • Each time ALLBASE/SQL switches to a new log file, a checkpoint is taken. Therefore, the size and number of log files can control the frequency of checkpoints. If you repeatedly see a Log Full message, add a new log file of the appropriate size.

  • In nonarchive logging mode, add as many log files as you need (one at a time, with separate ADDLOG commands) for a total size that can accommodate your largest transaction carried out by the maximum number of concurrent users.

  • In archive logging mode, add as many log files as you need (one at a time, with separate ADDLOG commands) to permit an ongoing cycle of STORELOG operations which make log files available.

  • ADDLOG prompts for the names of files to be added. You may enter a single log file name or, in the case of dual logging, you may enter two file names. ADDLOG will not accept more than two file names on a single line.

  • The maximum number of log files in a DBEnvironment is 34. Since one log is created when you start the DBEnvironment, the maximum number of log files you can add to a DBEnvironment is 33.

Authorization

You must be the DBECreator or provide the correct Maintenance Word to use this command.

Example



   >> ADDLOG

   DBEnvironment Name:  PARTSDBE.SOMEGRP.SOMEACCT

   Maintenance Word:   Return 

   Enter Log File Name(s) Separated by a Blank? LGN1.SOMEGRP.SOMEACCT

   New Log File Size? 300

   Add Log File (y/n)?  y



   Log file 'LGN1.SOMEGRP.SOMEACCT' was Added.

   Log Identifier Is: 2


Feedback to webmaster