Optical DCN Architecture Design with Proposed Sample Clauses

Optical DCN Architecture Design with Proposed. Technologies Page 36 of 37 Considering the requirements of future DCs and the advantage of SDM technologies, utilizing SDM for intra- and inter-rack connections could lead into a scalable architecture. On the Tx side, which means inside each NIC, cheap low-power consumption VCSEL arrays could be used, for intra-rack communication or inter-rack connections. Those arrays could be directly coupled with multicore fibers; saving space and energy (no SDM mux would be needed). A proposed architecture is shown in Figure 28. The all-optical Top-of-the-Rack consists of three switches. One OCS switch for long duration flows, serving both intra and inter-rack communication demands. There are several scenarios of what this OCS switch could be, which are analysed in the following paragraph. In any case, this OCS switch is transparent to any data rate and modulation format and can support any bitrate (i.e. 100Gb/s or 1Tb/s). In addition, two ultra-fast switches are used for OPS (or simply TDM to avoid the overhead of packet-header processing), one of which will be dedicated to intra-rack communication and the second for inter-rack. The reason of this selection is the usually large volume of traffic (~80%) that stays inside the rack, exchanging data between servers. However, this large traffic volume is mostly divided into short data flows, making optical packet switching or fast TDM switching the most suitable solution. Furthermore, the NICs will be fully-programmable and hybrid, supporting both OPS and OCS. They will have electronic buffers integrated that will aggregate traffic from each server to any possible destinations and either send it through OPS or set up optical circuits (OCS). Figure 21 Proposed architecture utilizing SDM technology and Optical Switches REFERENCES [greenICT] X. X. Xxxxx, “Sustainable ICT Networks: The GreenTouch Vision,” (available at xxxx://xxx.xxxxxxxxxx.xxx/uploads/documents/3%20Thierry%20Klein_EU%20SEW%20- %20The%20GT%20Vision%20-%20v2.pdf) [energyDCN-10] X. Xxxx, X. X. Xxxxx, P. M. Xxxxx, X. Xxxxxxxx, and X. Xxx, “Energy proportional datacentre networks,” Proceedings of the International Symposium on Computer Architecture, pp. 338–347, June 2010 [opticalDCN-2013] Xxxxxxx, Xxxxxxxxxxxx, Xxxxxxx, Xxxxx, Xxxxxx, Xxxxxxx, Optical Interconnects for Future Data Center Networks, 2013, Springer. [DCtraffic-13] Xxxxxxx Y & Xxxxxx, G. “Directing Data Centre Traffic”. SCIENCE — October 2013, Volume 342, Issue 6155, pp. 202-203. [jdsu-wss-whitepaper...
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