Intel 170 Servers User Manual
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.
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
API DTACPR
*HIGH
31
23
Restore
2.7:1
27
26
Save
iV5R2 Using
API DTACPR
*MED
API DTACPR
*MED
57
37
Restore
1.5:1
108
88
Save
iV5R2 Using
API DTACPR
*LOW
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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Chapter 15. Save/Restore Performance
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