Τίτλος:
Optical datacenter network employing slotted (TDMA) operation for
dynamic resource allocation
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The soaring traffic demands in datacenter networks (DCNs) are outpacing
progresses in CMOS technology, challenging the bandwidth and energy
scalability of currently established technologies. Optical switching is
gaining traction as a promising path for sustaining the explosive growth
of DCNs; however, its practical deployment necessitates extensive
modifications to the network architecture and operation, tailored to the
technological particularities of optical switches (i.e. no buffering,
limitations in radix size and speed). European project NEPHELE is
developing an optical network infrastructure that leverages optical
switching within a software-defined networking (SDN) framework to
overcome the bandwidth and energy scaling challenges of datacenter
networks. An experimental validation of the NEPHELE data plane is
reported based on commercial off-the-shelf optical components controlled
by FPGA boards. To facilitate dynamic allocation of the network
resources and perform collision-free routing in a lossless network
environment, slotted operation is employed (i.e. using time-division
multiple-access - TDMA). Error-free operation of the NEPHELE data plane
is verified for 200 mu s slots in various scenarios that involve
communication between Ethernet hosts connected to custom-designed
top-of-rack (ToR) switches, located in the same or in different
datacenter pods. Control of the slotted data plane is obtained through
an SDN framework comprising an OpenDaylight controller with appropriate
add-ons. Communication between servers in the optical-ToR is
demonstrated with various routing scenarios, concerning communication
between hosts located in the same rack or in different racks, within the
same or different datacenter pods. Error-free operation is confirmed for
all evaluated scenarios, underpinning the feasibility of the NEPHELE
architecture.
Συγγραφείς:
Bakopoulos, P.
Tokas, K.
Spatharakis, C.
Patronas, I. and
Landi, G.
Christodoulopoulos, K.
Capitani, M.
Kyriakos, A.
and Aziz, M.
Reisis, D.
Varvarigos, E.
Zahavi, E. and
Avramopoulos, H.
Εκδότης:
SPIE - INT SOC OPTICAL ENGINEERING
Τίτλος συνεδρίου:
OPTICAL INTERCONNECTS XVIII
Λέξεις-κλειδιά:
datacenter network; optical switching; slotted network; scheduling;
software-defined networking
