NDLI: Theia: Simple and Cheap Networking for Ultra-Dense Data Centers

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Theia: Simple and Cheap Networking for Ultra-Dense Data Centers

Content Provider	ACM Digital Library
Author	Padhye, Jitendra Walraed-Sullivan, Meg Maltz, David A.
Abstract	Recent trends to pack data centers with more CPUs per rack have led to a scenario in which each individual rack may contain hundreds, or even thousands, of compute nodes using system-on-chip (SoC) architectures. At this increased scale, traditional rack-level star topologies with a top-of-rack (ToR) switch as the hub and servers as the leaves are no longer feasible in terms of monetary cost, physical space, and oversubscription. We propose Theia, an architecture to connect hundreds of SoC nodes within a rack, using inexpensive, low-latency, hardware elements to group the rack's servers into subsets which we term SubRacks. We then replace the traditional per-rack ToR with a low-latency, passive, circuit-style patch panel that interconnects these SubRacks. We explore alternatives for the rack-level topology implemented by this patch panel, and we consider approaches for interconnecting racks within a data center. Finally, we investigate options for routing over these new topologies. Our proposal of Theia is unique in that it offers the flexibility of a packet-switched networking over a fixed circuit topology.
Starting Page	1
Ending Page	7
Page Count	7
File Format	PDF
ISBN	9781450332569
DOI	10.1145/2670518.2673885
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-10-27
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Network topologies Data center networks
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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