EECS 1012 Lecture Notes - Lecture 15: Fibre Channel, Display Server, Deeper Understanding
13 Jun 2018
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EECS 1012 Lecture 15 Notes
Introduction
X window and other graphics display methodologies
• The most common network technology used is fibre channel.
• However, other technologies, including TCP/IP, ATM, SCSI, and Ficon can all interface
directly with a fibre channel network.
• For a deeper understanding of SAN, the reader is referred to Tate et al. [TATE06].
• Graphical user interfaces are attractive, convenient, and relatively straightforward when
the computer and display are located together
• Such as in a personal computer or workstation
• When the display terminal is separated by a distance from the computer the graphical
interface is more difficult to achieve. Such a situation might occur
• For example, if a user is trying to operate her computer across a network, using the local
display and mouse facilities on a remote computer
• The difficulty is the large amount of data that must be transmitted from one location to
the other to transmit graphic images.
• We observed that a single bitmapped graphical image might contain thousands or
millions of bytes of information.
• Clearly, it is not practical to transmit the screen display as a bitmapped image across the
network on a continual basis.
• The X Window standard represents one successful attempt to solve this problem.
• X Window works by separating the software that actually produces the display image on
the screen from the application program that creates the image and requests the
display into a somewhat unusual client-server arrangement.
• The program that produces the image on the screen is known as a display server.
• We remind you that in data communications terminology a server is a program that
provides services for other programs.
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