Turboimage Database Enhancements - August 2001

Support of dataset size
> 80 GB
•Use record number instead of record name as the
internal pointers
•Need to specify $CONTROL LARGESET in
DBSCHEMA to create a database in record number
format
•Rootfile version will be ‘C’6 to denote the database
is in record number format
•Only one format allowed for a given database
•Use DBBIGSET.PUB.SYS to migrate databases
•DBINFO mode 406 tells what are the features used
•DBUTIL >>SHOW basename ALL will display
Using 24bit/8bit record name format
as the internal pointer limits the
maximum dataset size to 80GB.
Changing record name format to
record number format allows dataset
size greater than 80GB.
DBINFO mode 406, 17th element:
bit 0..15 where 15 is the rightmost bit
bit 9 : higher limit
bit 10: record number format
bit 11: not use
bit 12: MDX
bit 13: B-tree
bit 14: Jumbo
bit 15: DDX
Rootfile version in Rootfile record 0
‘C’2 -- base --- C.05.XX and before
‘C’3 -- jumbo --- C.06.XX
‘C’4 -- b-tree --- C.07.XX
‘C’5 -- limit --- C.09.XX
‘C’6 -- record number --- C.09.XX