HP OpenVMS for Integrity Servers and HP OpenVMS Alpha Version 8.2
HP OpenVMS for Integrity Servers and HP OpenVMS Alpha Version 8.2 Operating Systems SPD 82.35.01
• Galaxywide sections on a Galaxy platform that permit
multiple processes in multiple instances to access
shared address space concurrently.
• Common event flags that provide simple synchro-
nization.
• A lock manager that provides a more comprehen-
sive enqueue/dequeue facility with multilevel locks,
values, and asynchronous system traps (ASTs).
• Intracluster communication services through which
two processes running on the same system or on dif-
ferent OpenVMS Cluster nodes can establish a con-
nection and exchange data.
• Logical names through which one process can pass
information to other processes running on the same
system or on different OpenVMS Cluster nodes.
• Network interprocess communication is available via
TCP/IP Services and DECnet-Plus (product licenses
are required).
Symmetric Multiprocessing (SMP)
OpenVMS provides symmetric multiprocessing (SMP)
support for Alpha and Integrity servers multiprocessor
systems. SMP is a form of tightly coupled multipro-
cessing in which all processors perform operations si-
multaneously. All processors perform operations in all
OpenVMS access modes, user, supervisor, executive,
and kernel.
OpenVMS SMP configurations consist of multiple CPUs
executing code from a single shared memory address
space. Users and processes share a single copy of
OpenVMS I64 or OpenVMS Alpha address space. SMP
also provides simultaneous shared access to common
data in global sections to all processors. OpenVMS
SMP selects the CPU where a process will run based
on its priority and in special cases as directed by the
application. OpenVMS uses a specialized scheduling
algorithm when running a nonuniform memory access
(NUMA) platform.
SMP support is an integral part of OpenVMS and is
provided to the user transparently. Because an SMP
system is a single system entity, it is configured into
a network and OpenVMS Cluster configurations as a
single node.
The maximum number of supported CPUs in an SMP
configuration is 32.
Networking Facilities
OpenVMS provides device drivers for all HP local area
network (LAN) adapters listed in the LAN Options sec-
tion of Appendix A of this SPD. Application programmers
can use the QIO system service to communicate with
other systems connected via the LAN using either
Ethernet or Institute of Electrical and Electronics Engi-
neers (IEEE) 802.3 packet format. Simultaneous use
of HP Ethernet and the IEEE 802.3 protocols are sup-
ported on any HP LAN adapter.
OpenVMS Alpha supports Ethernet, FDDI, Token Ring,
and ATM for local area networks (LANs). OpenVMS I64
supports Ethernet only.
OpenVMS Alpha supports the standards defined by the
ATM Forum’s LANE Version 1.0 specifications for LAN
emulation over an ATM network. By implementing an
emulated LAN over an ATM network, you enable a
group of ATM stations to act like a traditional LAN.
LAN emulated over an ATM network allows you to run
your existing applications basically unchanged, while
the computers on which your applications are running
are connected to the ATM network.
OpenVMS supports the following networking products:
• HP TCP/IP Services for OpenVMS, the industry-
standard set of protocols for interoperating between
different operating systems
• HP DECnet-Plus, the Digital Network Architecture,
Phase V
• DECnet, the DIGITAL Network Architecture, Phase
IV
These networking products are described in this SPD
under Associated Products.
Terminal Server Products
HP terminal server products provide terminal server ac-
cess to OpenVMS. When used in an OpenVMS Clus-
ter environment, terminal servers distribute users across
the available Alpha and Integrity server systems at login
time.
OpenVMS can also establish a connection to other
devices (such as printers) attached to such terminal
servers.
Universal Serial Bus Support
OpenVMS supports the Universal Serial Bus (USB)
technology on the AlphaServer ES47, ES80, and
GS1280 systems, and the rx1600, rx2600, and rx4640
Integrity Server systems. Support for the USB inter-
connect enables OpenVMS systems to connect to mul-
tiple supported USB devices using a single USB ca-
ble. OpenVMS supports the fully qualified USB devices
listed in the appropriate AlphaServer platform configu-
ration and options web site:
http://h18002.www1.hp.com/alphaserver/
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