October 2011
Intermediate to advanced
510 pages
18h 48m
English
book
IBM IMS Version 12 Technical Overview
by Paolo Bruni, Isabelle Bruneel, Angie Greenhaw, Dougie Lawson, Jorge Alberto Luz Ribeiro, Egide Van Aershot
Content preview from IBM IMS Version 12 Technical Overview
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74 IBM IMS Version 12 Technical Overview
3.2.2 Parallel migration to HALDB: IMS 10 and IMS 11 small programming
enhancement
The IMS Unload utility (DFSURGU0) has been enhanced in IMS 10, IMS 11, and IMS 12 to allow
unloads of key ranges of an HDAM or HIDAM database when migrating to HALDB. Multiple
unloads for the same database can be run in parallel. This can significantly reduce the
elapsed time for a migration to HALDB.
An execution of HD Unload can be restricted to a range of keys when the MIGRATE=YES control
statement is included for migration to HALDB. The low (FROMKEY) and high (TOKEY) values
must be specified in hexadecimal. These value ...
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