Intel 7xx Servers, 170 Servers, AS/400 RISC Server Save and Restore Rates, Large File Parallel

15.9.3 Large File Parallel

For the measurements in this environment, BRMS was used to manage the save and restore, taking advantage of the ability built into BRMS to split an object between multiple tape drives. Starting with a 320 GB file in a single library and building it up to 2.1 TB for tape drive tests 1 - 4 and 8. The file was then duplicated in the library for tape drive tests 12 - 16, a single library with two 2.1 TB files was used. Not quite the same as having a 4.2 TB file. Because of certain limitations in building our test data, we felt this was the best way to build the test data. The goal is to see scaling of tape drives on the system along with trying to locate any saturation points that might help our customers identify limitations in their own environment.

Table 15.9.3.1 iV5R2 16 - 3580.002 Fiber Channel Tape Device Measurements (Parallel)

(Save = S, & Restore = R)

#
3580.002	1	2	3	4	8	12	13	14	15	16
Tape
drives
S	363	641	997	1.34	2.1	3.29	3.60	3.71	3.90	4
	GB/HR	GB/HR	GB/HR	TB/HR	TB/HR	TB/HR	TB/HR	TB/HR	TB/HR	TB/HR
R	340	613	936	1.23	1.90	2.95	3.14	3.35	3.55	3.65
	GB/HR	GB/HR	GB/HR	TB/HR	TB/HR	TB/HR	TB/HR	TB/HR	TB/HR	TB/HR

Save and Restore Rates

Large File Parallel Runs

	5
	4							4 TB/HR
TB/HR	3								Save
	2								Restore
	1
	0
	1	3	5	7	9	11	13		15
	2	4	6	8	10		12	14	16

# 3580 model 002 Tape Drives

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 15. Save/Restore Performance	251