Intel 170 Servers, AS/400 RISC Server, 7xx Servers manual User Mix Concurrent Runs

15.9.4 User Mix Concurrent

User Mix will generally portray a fair population of customer systems, where the real data is a mixture of programs, menus, commands along with their database files. The new ultra tape drives are in their glory when streaming large file data, but a lot of other factors play a part when saving and restoring multiple smaller objects.

Table 15.9.4.1 iV5R2 16 - 3580.002 Fiber Channel Tape Device Measurements (Concurrent)

(Save = S, & Restore = R)

# 3580.002		1	2	3	4	5	6	7	8	9	10	11	12
Tape drives
12 GB total
Library size	S	140	272	399	504	627	699	782	858	932	965	995	1010
workload
		GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR
was used
for
modeling
this, as	R	69	135	150	176	213	231	277	290	321	333	358	380
described in
		GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR	GB/HR
section
15.3

Save and Restore Rates

User Mix Concurrent Runs

	1200
	1000						1 TB/HR
GB/HR	800
	600
	400
	200
	0
	1	3	5	7	9		11
	2		4	6	8	10	12

# 3580 model 002 Tape Drives

Save

Restore

IBM i 6.1 Performance Capabilities Reference - January/April 2008
© Copyright IBM Corp. 2008	Chapter 15. Save/Restore Performance	252