NonStop Operations Guide for H-Series and J-Series RVUs

Processors in NonStop Systems Running J-Series RVUs
NonStop BladeSystem server blades and NonStop NS2400 series, NS2300, NS2200 series,
NS2100, and NS2000 series blade elements utilize multicore microprocessors (see Table 23
(page 121)). The set of cores on a NonStop server blade or blade element is considered to be one
CPU and is configured as one logical processor. Applications do not see the individual cores.
There can be two to sixteen logical CPUs (NonStop server blades) per NonStop BladeSystem, or
two to four logical CPUs (NonStop server blade elements) per NonStop NS2400 series, NS2300,
NS2200 series, NS2100, or NS2000 series system. There are no logical synchronization units
(LSUs) in a NonStop BladeSystem or NonStop NS2400 series, NS2300, NS2200 series, NS2100,
or NS2000 series system.
All input and output to and from each NonStop server blade is passed via the ServerNet fabrics.
A ServerNet fabric is a complex web of links that provide a large number of possible paths from
one point to another. Two communications fabrics, the X and Y ServerNet fabrics, provide
redundant, fault-tolerant communications pathways. If a hardware fault occurs on one of the
ServerNet fabrics, communications continues on the other with hardware fault recovery transparent
to all but the lowest level of the OS.
In NonStop BladeSystems and NonStop NS2400 series, NS2300, NS2200 series, NS2100, and
NS2000 series systems, ServerNet switches control ServerNet communications, rather than the
p-switches found in NonStop NS16000 series systems. In a NonStop BladeSystem, the ServerNet
switches are in the c7000 enclosure. In a NonStop NS2400 series, NS2300, NS2200 series,
NS2100, and NS2000 series system, the ServerNet switches are in the VIOs. There is one ServerNet
switch for each of the ServerNet fabrics.
In summary, these terms describe NonStop BladeSystem or NonStop NS2400 series, NS2300,
NS2200 series, NS2100, or NS2000 series system processors:
Table 23 Terms, Systems, and Planning Guides
DescriptionTerm, System, Planning Guide
Instruction Processing Unit. A single core of the
microprocessor.
IPU
Also known as a CPU. A set of cores sharing the same
memory. All IPUs in a logical processor share the same
Logical processor
memory map (except a small per-IPU anchor area). There
is one X and one Y ServerNet interface per logical
processor.
Server blade that houses one multicore microproccessor.NonStop server blade
Two to 16 NonStop server blades each utilize a four-core
microprocessor and are populated inside NonStop
BladeSystem c7000 enclosures.
NonStop BladeSystem NB56000c or NB56000c-cg
server blade
See the NonStop BladeSystem Planning Guide
• Four-core license file allows use of four cores.
• Two-core license file allows use of two cores.
(2 to 16 logical processors per system)
Two to 16 NonStop server blades each utilize a four-core
microprocessor and are populated inside NonStop
BladeSystem c7000 enclosures.
NonStop BladeSystem NB54000c or NB54000c-cg
server blade
See the NonStop BladeSystem Planning Guide
• Four-core license file allows use of four cores.
• Two-core license file allows use of two cores.
(2 to 16 logical processors per system)
Two to 16 NonStop server blades each utilize a two-core
microprocessor and are populated inside NonStop
BladeSystem c7000 enclosures.
NonStop BladeSystem NB50000c or NB50000c-cg
server blade
See the NonStop BladeSystem Planning Guide
(2 to 16 logical processors per system)
Overview of Processors 121