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

Table 23 Terms, Systems, and Planning Guides (continued)
DescriptionTerm, System, Planning Guide
Blade element that houses one dual-core
microproccessor.
NonStop blade element
Two or four NonStop blade elements each utilize a
two-core microprocessor and are installed in modular
cabinets.
NonStop NS2400 series blade element
See the NonStop NS2400 Planning Guide
(2 to 4 logical processors per system)
NonStop blade elements each utilize a two-core
microprocessor with one core enabled and are installed
in modular cabinets.
NonStop NS2300 series blade element
See the NonStop NS2300 Planning Guide
(2 to 4 logical processors per system)
Two or four NonStop blade elements each utilize a
two-core microprocessor with one core enabled and are
installed in modular cabinets.
NonStop NS2200 series blade element
See the NonStop NS2200 Series Planning Guide
(2 to 4 logical processors per system)
Two or four NonStop blade elements each utilize a
microprocessor with one core enabled and are installed
in modular cabinets.
NonStop NS2100 blade element
See the NonStop NS2100 Planning Guide
(2 to 4 logical processors per system)
Two or four NonStop blade elements each utilize a
two-core microprocessor and are installed in modular
cabinets.
NonStop NS2000 series blade element
See the NonStop NS2000 Series Planning Guide
(2 to 4 logical processors per system)
For NonStop BladeSystem NB54000c, NB54000c-cg, NB56000c, or NB56000c-cg, see the
NonStop BladeSystem Planning Guide to determine the number of cores enabled in a processor
or to increase the number of cores enabled in a processor.
NonStop NS16000 Series and NS14000 Series Blade Complex Processors
A NonStop NS16000 series or NS14000 series NonStop Blade Complex consists of two or three
processor modules called NonStop Blade Elements. Each Blade Element houses two or four
microprocessors called processor elements (PEs). A logical processor consists of one processor
element from each Blade Element. Although a logical processor physically consists of multiple
processor elements, it is convenient to think of a logical processor as a single entity within the
system. Each logical processor has its own memory, its own copy of the operating system, and
processes a single instruction stream. The logical processors are usually referred to simply as
“processors.”
All input and output to and from each NonStop Blade Element goes through a logical
synchronization unit (LSU). The LSU interfaces with the ServerNet fabrics and contains logic that
compares all output operations of a logical processor, ensuring that all NonStop Blade Elements
agree on the result before the data is passed to the ServerNet fabrics.
A processor with two NonStop Blade Elements comprises the dual modular redundant (DMR)
NonStop Blade Complex, which is also referred to as a duplex system.
Three NonStop Blade Elements plus their associated LSUs make up the triple modular redundant
(TMR) NonStop Blade Complex, which is referred to as a triplex system. The triplex system provides
the same processing speeds as the duplex system while also enabling hardware fault recovery that
is transparent to all but the lowest level of the NonStop operating system (OS).
In the event of a processor fault in either a duplex or triplex system, the failed component within
a NonStop Blade Element (processor element, power supply, and so forth) can be replaced while
122 Processors and Components: Monitoring and Recovery