User Mix Concurrent - IBM 170 Servers Manual

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)
# 3580.002
1
Tape drives
12 GB total
Library size
140
S
workload
GB/HR GB/HR
was used
for
modeling
this, as
69
R
described in
GB/HR GB/HR
section
15.3
Save and Restore Rates
User Mix Concurrent Runs
1200
1000
800
600
400
200
0
1
IBM i 6.1 Performance Capabilities Reference - January/April 2008
©
Copyright IBM Corp. 2008
(Save = S, & Restore = R)
2 3 4
272 399 504 627
GB/HR GB/HR GB/HR
135 150 176 213
GB/HR GB/HR GB/HR
3 5 7
2 4 6 8
# 3580 model 002 Tape Drives
Chapter 15. Save/Restore Performance
5 6 7 8
699 782 858
GB/HR GB/HR GB/HR
231 277 290
GB/HR GB/HR GB/HR
1 TB/HR
9 11
10 12
9 10 11
932 965 995
GB/HR GB/HR GB/HR GB/HR
321 333 358
GB/HR GB/HR GB/HR GB/HR
Save
Restore
12
1010
380
252