(redirected from 2-tier)
Also found in: Dictionary.


A common form of distributed system in which software is split between server tasks and client tasks. A client sends requests to a server, according to some protocol, asking for information or action, and the server responds.

This is analogous to a customer (client) who sends an order (request) on an order form to a supplier (server) who despatches the goods and an invoice (response). The order form and invoice are part of the "protocol" used to communicate in this case.

There may be either one centralised server or several distributed ones. This model allows clients and servers to be placed independently on nodes in a network, possibly on different hardware and operating systems appropriate to their function, e.g. fast server/cheap client.

Examples are the name-server/name-resolver relationship in DNS, the file-server/file-client relationship in NFS and the screen server/client application split in the X Window System.

Usenet newsgroup: news:comp.client-server.

["The Essential Client/Server Survival Guide", 2nd edition, 1996].
References in periodicals archive ?
Although all of the serum used for the serosurvey was negative by 2-tier testing, 8% of serum samples positive by whole-cell EIA (17/215) were positive on the C6 ELISA.
Birst's patented 2-tier data architecture and comprehensive BI platform sits on top of all of your data, to unify, refine and embed data consistently into every individual decision-up and down the org chart.
Furthermore, the resellers will receive a 2-tier affiliate commission upon each order placed via an affiliate link that belongs to an OpenWheeler affiliate they themselves have referred.
with high-quality construction that includes a 47-hp Tier 4 compliant diesel engine, 2-tier shaker table with quick-change 2-piece screens, hydraulic leveling system and adjustable height stacking conveyor.
A Comparison of Selected Fiscal Systems Selected Indicators The Character Range of Local Local Countries of Fiscal Government Fiscal Federalism Responsibilities Autonomy Australia 2-tier Centralised Limited Fair Brazil 3-tier Decentralised Extensive Fair Canada 2-tier Decentralised Extensive Strong Germany 2-tier Centralised Integrated Limited Fair India 3-tier Centralised Limited Weak Malaysia 2-tier Centralised Limited Weak Nigeria 3-tier Centralised Limited Weak Russia 2-tier Centralised Limited Fair Spain 2-tier Centralised Limited Fair South Africa 3-tier Centralised Limited Fair Switzerland 2-tier Decentralised Extensive Strong United States 2-tier Decentralised Extensive Strong Source: Shah Anwar, 'Comparative Conclusions on Fiscal Federalism'.
It is linked to the proposed closure of Birkenshaw Middle School as part of the change from a 3-tier to a 2-tier system in the Whitcliffe Mount pyramid of schools.
9) With this in mind, the new South African curriculum has developed a 2-tier system that specifically accommodates alternatives in training to allow for a 4-year training following the intermediate surgical examination in addition to the current 2-year programme following general surgical specialist registration
For the validation of this method, we analyzed 13 521 leftover newborn screening blood spots that were initially submitted to Mayo Clinic's supplemental newborn screening program and were not suggestive of TYR 1, based on a previously published 2-tier screening approach (8).
4 GHz processor running SAP ERP 2005, Oracle(R) Database 10g and Solaris 10 set a new world-record for the SAP SD 2-tier standard application benchmark for systems with 16 processors as of 04/17/07, achieving 7,300 SD benchmark users.
Sus could carry four stretchers, twice that of the wheeling, using a 2-tier system.
The removable 2-tier water reservoir is another feature.
This room is fitted with a comprehensive range of medium oak-fronted units with rolled edge, laminated work surfacing and an acrylic drainer sink unit with mixer tap; integrated dishwasher, wine rack, 2-tier display shelving and space for a slot-in cooker with matching work surface, further display shelving, two floor-to-ceiling storage units and an attractive china cabinet.