Difference between revisions of "Network Latencies"
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Network latency together with bandwidth are the two major <b>harware</b> inhibitors for parallel computing. This holds for clusters and grids, but also for system-on-a-chip solutions like the Cell architecture, which in fact is a cluster/grid on a chip. | Network latency together with bandwidth are the two major <b>harware</b> inhibitors for parallel computing. This holds for clusters and grids, but also for system-on-a-chip solutions like the Cell architecture, which in fact is a cluster/grid on a chip. | ||
== | ==Forces Stimulating the Development of Low Latency Infrastructure:== | ||
*Demand for latency sensitive applications: | *Demand for latency sensitive applications: | ||
**Online computer games | **Online computer games | ||
**high performance computing | **high performance computing | ||
**video conferencing | **video conferencing | ||
**voice over IP, etc. | **voice over IP | ||
**Lots of <b>new</b> market opportunities (High Performance Computing for everybody): | |||
***Complex Stock Market Analysis on Demand | |||
***Remote control of equipement X | |||
***Complex whatever, for consumers etc. | |||
*Optical Fibres | *Optical Fibres | ||
== | |||
Speed of light | ==Forces Inhibiting Low Latency Infrastructure Development:== | ||
*Speed of light | |||
*Network Switching Techology | |||
*<b>Cost</b> of (Re)placing new Switches and Cables | |||
Revision as of 19:46, 12 March 2005
Description:
What are the driving forces behind network latency? What is latency?
Latency is the amount of time needed for a packet to go from place A to B, and to receive a response packet from B back to A.
[t=0, place=A] send packet to B ==> [t=25, place=B] Sent response to A ===> [t=50, place=A]
Network latency together with bandwidth are the two major harware inhibitors for parallel computing. This holds for clusters and grids, but also for system-on-a-chip solutions like the Cell architecture, which in fact is a cluster/grid on a chip.
Forces Stimulating the Development of Low Latency Infrastructure:
- Demand for latency sensitive applications:
- Online computer games
- high performance computing
- video conferencing
- voice over IP
- Lots of new market opportunities (High Performance Computing for everybody):
- Complex Stock Market Analysis on Demand
- Remote control of equipement X
- Complex whatever, for consumers etc.
- Optical Fibres
Forces Inhibiting Low Latency Infrastructure Development:
- Speed of light
- Network Switching Techology
- Cost of (Re)placing new Switches and Cables