Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual Software Compression, High

15.22 Software Compression

The rates a customer will achieve will depend upon the system resources available. This test was run in a very favorable environment to try to achieve the maximum rates. Software compression rates were gathered using the QSRSAVO API. The CPU used in all compression schemes was near 100%. The compression algorithm cannot span CPUs so the fact that measurements were performed on a 24-way system doesn’t affect the software compression scenario.

Table 15.22.1 - Measurements on an 840 24-way system 1080 RAID protected DASD Units (GB/HR) 128 GB mainstore

					Software
		NSRC1GB	NUMX12GB	SR16GB	Compression
					Ratio
iV5R1	Save	19	135	170
	Restore	7	45	170
iV5R2	Save	19	200	480
	Restore	7	50	480
iV5R2 Using	Save		88	108	1.5:1
API DTACPR	Restore		37	57
*LOW
iV5R2 Using	Save		26	27	2.7:1
API DTACPR	Restore		23	31
*MED
iV5R2 Using	Save		6	6	3:1
API DTACPR	Restore		39	65
*HIGH

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008	Chapter 15. Save/Restore Performance	269