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Glossary
Chipkill
A technology developed by IBM for situations that demand high
availability. It allows a system (usually CPU or motherboard) to detect
problems with the computer’s memory and selectively disable the
problematic DIMMS.
availability. It allows a system (usually CPU or motherboard) to detect
problems with the computer’s memory and selectively disable the
problematic DIMMS.
ECC
Error Correcting Code. A type of memory that corrects errors on the fly.
PCI-E
Peripheral Component Interconnect Express. Formerly known as third-
generation I/O, this implementation of the PCI computer bus that uses
existing PCI programming concepts and communication standards, but
bases it on a much faster serial communications system.
generation I/O, this implementation of the PCI computer bus that uses
existing PCI programming concepts and communication standards, but
bases it on a much faster serial communications system.
PCI-X
Peripheral Component Interconnect Extended. A computer bus technology
that increases the speed that data can move within a computer from
66 MHz to 133 MHz.
that increases the speed that data can move within a computer from
66 MHz to 133 MHz.
SAS
Serial Attached SCSI. The successor to the original SCSI technology with
the ability to address up to 16,256 devices per port. It also has a more
reliable point-to-point serial connection at speeds of up to 3 Gbps.
the ability to address up to 16,256 devices per port. It also has a more
reliable point-to-point serial connection at speeds of up to 3 Gbps.
Ethernet 10/100/1000Base-T The most widely used LAN access method defined by the IEEE 802.3
standard; uses standard RJ-45 connectors and telephone wire. 100Base-T
is also referred to as Fast Ethernet. And 1000Base-T is also referred to as
Gigabit Ethernet.
is also referred to as Fast Ethernet. And 1000Base-T is also referred to as
Gigabit Ethernet.
IKE
Internet Key Exchange. A method for establishing a security association
that authenticates users, negotiates the encryption method and exchanges
the secret key. IKE is used in the IPSec protocol.
that authenticates users, negotiates the encryption method and exchanges
the secret key. IKE is used in the IPSec protocol.
I/O
Input/output. Transferring data between the CPU and any peripherals.
IPSec
IP Security. A security protocol from the IETF (Internet Engineering Task
Force) that provides authentication and encryption over the Internet.
Unlike SSL, which provides services at layer 4 and secures two
applications, IPSec works at layer 3 and secures everything in the
network.
Force) that provides authentication and encryption over the Internet.
Unlike SSL, which provides services at layer 4 and secures two
applications, IPSec works at layer 3 and secures everything in the
network.
IPMI
Intelligent Platform Management Interface. System management
architecture for providing an industry-standard interface and methodology
for system management.
architecture for providing an industry-standard interface and methodology
for system management.
L2 cache
Also referred to as Ecache or External Cache. A memory cache external to
the CPU chip. The AMD Opteron processor integrates 1 MB of L2 cache
per CPU.
the CPU chip. The AMD Opteron processor integrates 1 MB of L2 cache
per CPU.
MTBF
Mean Time Between Failures. The average time a component works
without failure.
without failure.
SNMP
Simple Network Management Protocol. A set of protocols for managing
complex networks. The first versions of SNMP were developed in the
early 80s. SNMP works by sending messages, called protocol data units
(PDUs), to different parts of a network. SNMP-compliant devices, called
agents, store data about themselves in Management Information Bases
complex networks. The first versions of SNMP were developed in the
early 80s. SNMP works by sending messages, called protocol data units
(PDUs), to different parts of a network. SNMP-compliant devices, called
agents, store data about themselves in Management Information Bases
Just the Facts, August 2007
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