iX V6.5 (30391-90011)

Chapter 7 333

Logging and Recovery

Logging Preparation

True-online backup. An example is given below:

Access is enabled.

Logging is enabled.

Database last stored using True-Online Backup and

log file NLOG007 on THU, JAN 18, 1996, 6:06 PM.

If you used the AUTO option with GETLOG command, you may purge log ﬁles NLOG001

up to NLOG006. When you continue updating the database, log ﬁles up to NLOG999

will be automatically created when needed. After that, the log ﬁle NLOG001 is

automatically created and used as is done today. If the log ﬁle, next in sequence to be

automatically created, already exists, an error will be generated. As the log ﬁles are

automatically created in a round-robin fashion as done today for the AUTO option, you

will have to take extra measures to ensure that the log ﬁles, logically related to your

database for recovery, are properly maintained. One way is to always start a new log

cycle beginning with the ﬁrst log ﬁle, NLOG001, of the log ﬁle set. If you did not use the

AUTO option, you do not need to purge any ﬁles.

Example

Following is an example of how to store your database using this method:

:BUILD DBUSASF;DISC=5000

:STORE DBUSA;*DBUSASF;ONLINE=START

>> TURBO-STORE/RESTORE VERSION C.55.07 B5152AA <<

STORE dbusa;*dbusasf;ONLINE=START

SUN, MAR 23, 1997, 4:05 PM

ONLINE BACKUP UTILIZED DISC SPACE FOR LOG ON THE FOLLOWING VOLSETS:

MPEXL_SYSTEM_VOLUME_SET : 0 KB

DATABASE INFORMATION:

TURBOIMAGE DATABASE: DBUSA .RECTOL .QALANG

FILES STORED : 4

TOTAL MEDIA WRITTEN : 1