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Data Consistency, Recovery, and Migration 4-29
Write Log Records to Tape
Write Log Records to Tape
The tbtape process begins copying each page in the logical log file to tape.
When the last page in the log file is copied, the backup is complete. Figure 4-3
illustrates the order of information on the logical log backup tape.
If the backup was initiated implicitly through continuous logging, the logical
log backup session continues. The tbtape process waits until the next logical
log file becomes full.
Figure 4-3
Each logical log
backup begins with
blobpages, if any,
then the header
page, and then the
log records.
Order of information on the logical log backup tape
1
2
3
Logical log backup tape
Blobspace A
Blobspace B
Logical log
backupsession
header page
Logical log (status U-B)
Logical log (status U)
Logical log (status U-C)