4.1 Prerequisite Procedures Overview

Table 4-1 Prerequisite Procedures Overview

Procedure	Elapsed Time (hr:min)	Procedure Title
	This Step	Cum.
Check Required Materials	0:10-0:30	0:10-0:30
DSR ISO Administration	0:15-0:30	0:25-1:00
Verification of Configuration Data	0:20-0:30	0:55-1:30
Data Collection for Source Release 9.0 and Later	0:15-0:20	1:10-1:50
Back Up TKLCConfigData Files	0:15-0:30	1:30-3:05
Full Backup of DB Run Environment at Each Server	0:10-2:00	1:40-5:05

ISO transfers to the target systems may require a significant amount of time depending on the number of systems and the speed of the network. These factors may significantly affect total time needed and may require the scheduling of multiple maintenance windows to complete the entire upgrade procedure. The ISO transfers to the target systems should be performed prior to and outside of the scheduled maintenance window. Schedule the required maintenance windows accordingly before proceeding.

Note:

• Verify if the performance tuning parameters txqueuelen, ring buffer, and multiqueue are set appropriately before upgrade. For more information, see Oracle Communications DSR Cloud Installation Guide.
• Performance tuning parameters on host machine may change after Oracle Linux upgrade on host machine. Verify these performance tuning parameters after upgrading Oracle Linux on host machine. For more information, see Oracle Communications DSR Cloud Installation Guide.