HP-UX 11i v3 Mass Storage I/O Performance Improvements

Figure 5 Boot and scan times
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
HP-UX 11i v2
3.37 10.00
HP-UX 11i v3
0.73 7.00
Initial Scan During Boot Shutdown & Reboot Time
Elapsed Time
(minutes)
(44 seconds)
4.6x
Improvement
1.4x
Improvement
Figure 6 Run-time ioscan times
0
2
4
6
8
10
12
14
16
18
20
HP-UX 11i v2
19 12 16 0.0
HP-UX 11i v3
9.5 0.9 4.3 2.6
'ioscan' 'ioscan -kf' 'ioscan -kfn' 'ioscan -kfnN'
Elapsed Time
(
seconds
)
n/a
2x
13x
3.7x
Tests: ioscan Hardware scan
ioscan -kf Scan kernel I/O system data structures
ioscan -kfn Kernel scan + legacy DSFs
ioscan -kfnN Kernel scan + new persistent DSFs
Crash dump performance improvements
Parallelism features have been added to the crash dump utility in HP-UX 11i v3 to significantly reduce
the dump time. HP testing shows that dump times can be reduced to less than one-quarter of HP-UX
11i v2 dump times on equivalent configurations. For more information, see the HP-UX 11i v3 Crash
Dump Improvements white paper.
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