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.

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.

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.
References in periodicals archive ?
In this way, the amount of communications generated by obtaining file attributes, such as multiple file names and file sizes, is greatly reduced, as are the delays influenced by network latency.
In section 4, we evaluate the effectiveness of the proposed method for sets of real network latency data.
Historically, measuring network latency has been the domain of network engineers and was haphazard at best.
And controlling network latency is one of the most critical issues faced by high speed traders today.
Network latency - the milliseconds or microseconds of time it takes to transmit trades electronically from an algorithmic trading platform to the market - is one of the most critical factors in optimizing trading profits.
At the same time, this architecture exacts a price on end-users by forcing them to be online to use their applications and anchored in their offices, and plaguing them with frustratingly poor performance due to network latency and the inevitable outages that occur when connected to the Internet.
Joint Solution Enables Greater Transparency of Network Latency Challenges Faced by Financial Institutions
And there are distinct advantages to the DAS topology: high performance without any network latency or bottlenecks to contend with.
By leveraging this organization's insight, ClearSight produced Cronos, a solution that makes it possible to minimize network latency and eliminate message loss, allowing financial traders to detect network issues in the time granularity required for optimal network performance.
IPP offloads TCP and packet processing from the system to reduce CPU utilization, increase data throughput, and decrease network latency.
com) announces Enterprise Real-TimeNet which lowers and guarantees network latency, network bandwidth and network task execution with round-trip worst-case times of 50 microseconds.

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