Unit:
Κατεύθυνση Ηλεκτρονικός Αυτοματισμός (Η/Α, με πρόσθετη εξειδίκευση στην Πληροφορική και στα πληροφοριακά συστήματα)Library of the School of Science
Supervisors info:
Ρεΐσης Διονύσιος, Αναπληρωτής Καθηγητής, Τμήμα Φυσικής, Ε.Κ.Π.Α.
Original Title:
Μελέτη και αξιολόγηση της απόδοσης μεταγωγού ικριώματος (Top of Rack-ToR) για οπτικά κέντρα δεδομένων με λειτουργία πολλαπλής πρόσβασης διαίρεσης χρόνου (TDMA)
Translated title:
Study and Evaluation of the Performance of a Top of Rack (ToR) switch for optical data centers with Time Division Multiple Access (TDMA) operation
Summary:
The continuously increasing traffic in data centers as well as the shift from local to centralized Information Technology (IT) infrastructure create the need to fully harness the data center, making consequently the networking aspects of Data Centers major importance and leading both to use photonic technology as well as new network architectures for Data Centers (DCs).
Today’s research focuses on new design techniques and management for Data Centers in an effort to eliminate the disadvantages of existing network hierarchical topologies. The hierarchical topologies used up to these days are not the most suitable for DCs, given the fact, that the type of traffic flowing in DCs is mostly east-west traffic instead of north-south.
A new DC design approach is developed by the NEPHELE project. The NEPHELE modular architecture is based on point of delivery (pod) switches. In the NEPHELE network a pod consists of racks. Each rack contains the “innovation zones”, which include disaggregated computing, storage and memory resources of the disaggregated-DC and they are connected through Network interface controllers (NICs) to the corresponding NEPHELE Top of rack (ToR) switch. The ToR interconnects the innovation zones with the higher network tier (POD switches) and through ToR can also be connected to any other innovation zone.
This thesis focused on a hybrid electrical/optical ToR switch, that enables optical switching of traffic both in the Data Center’s upper layer (POD switches) and at the rack level.
The hybrid ToR architecture is based on a legacy Ethernet switch and FPGA-implemented port extenders, placed at the southbound and northbound ports of the Ethernet switch in order to realize all the required additional functionality for the TDMA optical switching.
The hybrid ToR provides two types of interfaces for southbound communication (towards the innovation zones) namely standard (“legacy”) Ethernet ports and all-optical TDMA ports. For northbound communication there are equal, to the southbound communication, ports. Finally, this thesis presents the most characteristic metrics for evaluation of the performance of intra-DCs networks.
Main subject category:
Science
Keywords:
Data centers, Top of Rack (ToR) switch, Optical switching
File:
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Goula_V.pdf
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