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DB2 ist ein Produkt der
IBM Corporation. Bitte Copyright- und Trademark-Hinweise beachten!
http://www.redbooks.ibm.com/redpieces/pdfs/redp4187.pdf
Disk storage has changed rapidly over the past few years with the delivery of new functions and improved performance. DB2 has made many changes to keep pace and to be able to use the disk improvements. In this paper we discuss a number of these improvements and the improved synergy in recent versions up to DB2 for z/OS Version 8.
DB2® integrates with the storage management software and continues to deliver synergy with FICON® (fiber connector) channels and disk storage features.
DB2 uses Parallel Access Volume and Multiple Allegiance features of the IBM® TotalStorage® Enterprise Storage Server® (ESS) and DS8000™.
FlashCopy® V2 helps increase the availability of your data while running the CHECK INDEX
SHRLEVEL(CHANGE) utility.
DB2 integrates with z/OS® 1.5 and later to deliver the system point in time recovery capability, a solution applicable to recovery, disaster recovery, or environment cloning needs.
ESS and DS8000 FlashCopy is used for DB2 BACKUP and RESTORE SYSTEM utilities which implement the solution.
Larger control interval sizes help performance with table space scans as well as resolving some data integrity issues. Striping is an effective way of increasing sequential throughput by spreading control intervals across multiple devices.
The MIDAW function, new with the z9-109 server, improves FICON performance by reducing channel utilization and increasing throughput for parallel access streams.
In this Redpaper we discuss the following topics:
Disk hardware architecture
Disk functions
SMS
DSNZPARMs relating to disk storage management Utilities and FlashCopy The MIDAW facility - Improved channel architecture
P.S. Please pass my address to anyone interested in DB2 HOTLINE - thank you.
With kind regards
Michael Dewert, Software Group
DB2 Development
DB2 Information Management Software
© Gernot Ruban