Buffer credits

Buffer credits

Buffer credits, also called buffer-to-buffer credits (BBC) are used as a flow control method by Fibre Channel technology and represent the number of frames a port can store.

Each time a port transmits a frame that port's BB Credit is decremented by one; for each R RDY received, that port's BB Credit is incremented by one. If the BB Credit is zero the corresponding node cannot transmit until an R_RDY is received back.

The benefits of a large data buffer are particularly evident in long distance applications, when operating at higher data rates (2Gbit/s, 4Gbit/s), or in systems with a heavily loaded PCI bus.

ee also

Fibre Channel, Host adaptor, End-to-End Credit


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Buffer Credits — werden auch buffer to buffer credits genannt. Sie gewährleisten die Kommunikation in einem Fibre Channel Storage Area Network (SAN), insbesondere bei großen Distanzen zwischen den Geräten. Da die Signale nicht schneller als Lichtgeschwindigkeit… …   Deutsch Wikipedia

  • Speichernetzwerk — Als Storage Area Network (SAN, dt. Speichernetzwerk) bezeichnet man im Bereich der Datenverarbeitung ein Netzwerk zur Anbindung von Festplattensubsystemen und Tape Libraries an Server Systeme. Inhaltsverzeichnis 1 Definition eines SAN 2… …   Deutsch Wikipedia

  • Fibre Channel Logins — takes place after a link is operational. There are three different types of logins in Fibre Channel technology: * Fabric Login (FLOGI) * Port Login (PLOGI) * Process Login (PRLI)In the Login process different operational parameters are exchanged …   Wikipedia

  • Storage Area Network — Als Storage Area Network (SAN, dt. Speichernetzwerk) bezeichnet man im Bereich der Datenverarbeitung ein Netzwerk zur Anbindung von Festplattensubsystemen und Tape Libraries an Server Systeme. Storage Area Networks sind für serielle,… …   Deutsch Wikipedia

  • PCI Express — Not to be confused with PCI X. PCI Express Year created 2004 Created by Intel · Dell · IBM · …   Wikipedia

  • international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium

  • Real time database — A real time database is a processing system designed to handle workloads whose state is constantly changing (Buchmann). This differs from traditional databases containing persistent data, mostly unaffected by time. For example, a stock market… …   Wikipedia

  • India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …   Universalium

  • Cake (band) — Infobox musical artist Name = Cake | Img capt = John McCrea performing with CAKE in Atlanta, Georgia in 2006 Background = group or band Origin = Sacramento, California, USA Genre = Alternative rock College rock Years active = 1991 – Present Label …   Wikipedia

  • china — /chuy neuh/, n. 1. a translucent ceramic material, biscuit fired at a high temperature, its glaze fired at a low temperature. 2. any porcelain ware. 3. plates, cups, saucers, etc., collectively. 4. figurines made of porcelain or ceramic material …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”