Intel AS/400 RISC Server - Manual (Page 269)

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.
65 39 Restore
3:1 6 6 Save iV5R2 Using
API DTACPR
*HIGH
31 23 Restore
2.7:1 27 26 Save iV5R2 Using
API DTACPR
*MED
57 37 Restore
1.5:1 108 88 Save iV5R2 Using
API DTACPR
*LOW
480 50 7 Restore
480 200 19 Save iV5R2
170 45 7 Restore
170 135 19 Save iV5R1
Software
Compression
Ratio
SR16GB NUMX12GB NSRC1GB
Table 15.22.1 - Measurements on an 840 24-way system 1080 RAID protected DASD Units (GB/HR) 128 GB
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IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
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Copyright IBM Corp. 2008 Chapter 15. Save/Restore Performance 269