IBM 000-8697 Place Log Header on Tape

4-28 IBM Informix OnLine Database Server Administrator’s Guide
Place Log Header on Tape
Each blobpage that was allocated during the time that this log file was
current is copied to the tape deviceLTAPEDEV. This is required as part of
blobspace logging to ensure that blobspace blobs can be restored after a
DELETEstatement, if required. (Refer to page 4-22 for a detailed explanation
of blobspace logging.)
Place Log Header on Tape
After all blobspace free-map pages have been checked and the required
blobpages have been copied to tape,tbtape writes a log header page to the
device.
The log header page is distinct from the tape header page. The log header
pagespecifies the identification number of the logical log file and the number
of pages from the logical log file that need to be copied.