latency

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latency

[′lat·ən·sē]
(computer science)
The waiting time between the order to read/write some information from/to a specified place and the beginning of the data-read/write operation.
(medicine)
The stage of an infectious disease, other than the incubation period, in which there are neither clinical signs nor symptoms.
(physiology)
The period between the introduction of and the response to a stimulus.
(psychology)
The phase between the Oedipal period and adolescence, characterized by an apparent cessation of psychosexual development.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

latency

(communications)
1. The time it takes for a packet to cross a network connection, from sender to receiver.

2. The period of time that a frame is held by a network device before it is forwarded.

Two of the most important parameters of a communications channel are its latency, which should be low, and its bandwidth, which should be high. Latency is particularly important for a synchronous protocol where each packet must be acknowledged before the next can be transmitted.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

latency

(1) Essentially any delay or lapse in time. In general, it is the time between initiating a request in the computer and receiving the answer. Data latency may refer to the time between a query and the results arriving at the screen or the time between initiating a transaction that modifies one or more databases and its completion.

Disk latency is the time it takes for the selected sector to be positioned under the read/write head. Channel latency is the time it takes for a computer channel to become unoccupied in order to transfer data. Network latency is the delay introduced when a packet is momentarily stored, analyzed and then forwarded.

(2) With malicious software, latency is the period between infection and the first obvious damage to the host system. Many viruses or logic bombs written by amateurs have a short latency and are therefore relatively easy to detect; however, more vicious malware can lie dormant or replicate to many other hosts and then wreak havoc unexpectedly. See logic bomb and virus.
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References in periodicals archive ?
However, the effective collaboration in VEs is strongly affected by the network latency. In CVEs, as the users are geographically distributed, a considerable amount of latency occurs in the collaborative work.
With two network file-sharing protocols that are widely used in file-sharing systems, CIFS and SMB(2), the effects of network latency can impose significant wait times for accessing files, creating a demand for improving speed.
Based on the oscillating behavior of network latency both in a long-term and a short-term aspect we define five typical network statuses.
Credit Suisse (NYSE: CS) has implemented a network latency management system.
The inherent performance issues of WANs, such as low bandwidth and high network latency, usually make response-time performance to Web-based content unacceptable to most users.
SafeMedia has the only solution that was designed to stop encrypted contaminated networks, protecting user privacy, without requiring deep packet or content inspection, without measurable network latency and without time consuming and expensive acoustical finger printing, explained Foote.
Network latency calculations take into consideration the processing time required by network adapters to process and transmit (or receive) the packet, as well as the latency in the interconnect network, which includes cable length, load on the network and the processing latency of the interconnect switch.
Limited bandwidth and network latency are the issues which need to be considered while using wireless LAN for packetized voice data.
The system comprises client software that must be installed at both sides of the conference, as well as a service for connecting calls and monitoring network latency, which is handled by SightSpeed.
Thus "each thread's scanning rate was limited by network latency," the report said.
'Balancing this will be the 'always on' nature of GPRS, analogous to DSL services in the fixed environment, though network investment and design will play a major part in defining the levels of network latency and responsiveness.
These include Intelligent Resource Director for Linux and networking advances that will use server memory to allow information to travel at memory speed across logical partitions, minimizing network latency, maximizing bandwidth and improving availability.

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