HP-UX 11i v3 Crash Dump Improvements

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Compressed Dump
Uncompressed Dump
= available CPUs = CPUs assigned to dump units
= dump device(s) assigned to dump units
Figure 2 – CPU Usage in Three Dump Units
D1 D3 D2
D2
D3
D1
=
legacy
dump device
.
= available CPUs = CPUs assigned to dump unit
Uncompressed Dump
Compressed Dump
L
L
L
L
L
L
L
Figure 3 – Legacy Devices and Dump Units
D1
D1
All legacy
dump
devices are assigned to a single dump unit
= HBA port
Figure 2 shows the CPUs used in three dump units. Uncompressed dump uses 3 of the 16 CPUs,
while compressed dump uses 15 of the 16 available CPUs.
3.2.2 Devices and Dump Units
Figure 3 illustrates the relationship between devices controlled by legacy dump drivers (“legacy
dump devices”) and dump units. Multiple legacy devices cannot be accessed in parallel, so all
legacy devices get assigned to a single dump unit.