| slovo | definícia |
fibre channel
(foldoc) | Fibre Channel
An ANSI standard
originally intended for high-speed SANs connecting
servers, disc arrays, and backup devices, also later
adapted to form the physical layer of Gigabit Ethernet.
Development work on Fibre channel started in 1988 and it was
approved by the ANSI standards committee in 1994, running at
100Mb/s. More recent innovations have seen the speed of Fibre
Channel SANs increase to 10Gb/s. Several topologies are
possible with Fibre Channel, the most popular being a number
of devices attached to one (or two, for redundancy) central
Fibre Channel switches, creating a reliable infrastructure
that allows servers to share storage arrays or tape libraries.
One common use of Fibre Channel SANs is for high availability
databaseq clusters where two servers are connected to one
highly reliable RAID array. Should one server fail, the
other server can mount the array itself and continue
operations with minimal downtime and loss of data.
Other advanced features include the ability to have servers
and hard drives seperated by hundreds of miles or to rapidly
mirror data between servers and hard drives, perhaps in
seperate geographic locations.
{Fibre Channel Industry Association
(http://fibrechannel.org)} (FCIA).
(2003-09-27)
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| | podobné slovo | definícia |
fibre channel-arbitrated loop
(foldoc) | Fibre Channel-Arbitrated Loop
(FC-AL) A fast serial bus interface
standard intended to replace SCSI on high-end servers.
FC-AL has a number of advantages over SCSI. It offers higher
speed: the base speed is 100 megabytes per second, with 200,
400, and 800 planned. Many devices are dual ported, i.e., can
be accessed through two independent ports, which doubles speed
and increases fault tolerance. Cables can be as long as 30 m
(coaxial) or 10 km (optical). FC-AL enables
self-configuring and hot swapping and the maximum number
of devices on a single port is 126. Finally, it provides
software compatibility with SCSI.
Despite all these features FC-AL is unlikely to appear on
desktops anytime soon, partly because its price, partly
because typical desktop computers would not take advantage
of many of the advanced features. On these systems FireWire
has more potential.
[Current status? Reference?]
(1999-09-12)
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