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Resource Disaggregation versus Integrated Servers in Data Centers: Impact of Internal Transmission Capacity Limitation
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab). (Optical Network Laboratory (ON Lab))ORCID iD: 0000-0001-6704-6554
KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
2018 (English)In: Proceedings 2018 European Conference on Optical Communication (ECOC), Institute of Electrical and Electronics Engineers (IEEE), 2018Conference paper, Published paper (Refereed)
Abstract [en]

This paper shows that internal transmission capacity limitations in disaggregated data centers cannot be ignored. Insufficient capacity may reduce the inherent benefits of resource disaggregation in terms of resource utilization compared to the integrated solutions.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-244838DOI: 10.1109/ECOC.2018.8535214OAI: oai:DiVA.org:kth-244838DiVA, id: diva2:1292614
Conference
ECOC 2018, 44th EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION, Roma, Italy, September 23-27, 2018
Note

QC 20190301

Available from: 2019-02-28 Created: 2019-02-28 Last updated: 2019-06-07Bibliographically approved
In thesis
1. Optical Interconnects for Next Generation Data Centers: Architecture Design and Resource Allocation
Open this publication in new window or tab >>Optical Interconnects for Next Generation Data Centers: Architecture Design and Resource Allocation
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The current data center architectures based on blade servers and elec- tronic packet switches face several problems, e.g., limited resource utilization, high power consumption and cost, when handling the rapidly growing of data traffic. Optical networks offering ultra-high capacity and requiring low energy consumption are considered as a good option to address these problems. This thesis presents new data center architectures based on optical interconnects and transmissions, and evaluates performance by extensive simulations.

The first main contribution of the thesis is to introduce a passive optical top-of-rack interconnect (POTORI) architecture. The data plane of POTORI mainly consists of passive components to interconnect the servers within the rack. Using the passive components makes it possible to significantly reduce power consumption while achieving high reliability in a cost-efficient way. In addition, the POTORI’s control plane is based on a centralized controller, which is responsible for coordinating the communications among the servers in the rack. A cycle-based medium access control (MAC) protocol and a dy- namic bandwidth allocation (DBA) algorithm are designed for the POTORI to efficiently manage the exchange of control messages and the data transmis- sion inside the rack. Simulation results show that under realistic DC traffic scenarios, the POTORI with the proposed DBA algorithm is able to achieve an average packet delay below 10 μs with the use of fast tunable optical transceivers.

The second main contribution of the thesis is to investigate rack-scale disaggregated data center (DDC) architecture for improving resource utiliza- tion. In contrast to the traditional DC with blade servers that integrate various types of resources (e.g., central processing unit (CPU), memory) in a chassis, the rack-scale DDC contains fully decoupled resources held on differ- ent blades, referred to as resource blades. The resource blades are required to be interconnected within the rack by an ultra-high bandwidth optical in- terconnect through the optical interfaces (OIs). A resource allocation (RA) algorithm is proposed to efficiently schedule the resources in the DDC for virtual machine requests. Results show that with sufficient bandwidth on the OIs, the rack-scale DDC with the proposed RA algorithm can achieve 20% higher resource utilization and make 30% more revenue comparing to the traditional DC.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2019. p. 61
Series
TRITA-EECS-AVL ; 2019:18
National Category
Communication Systems
Research subject
Information and Communication Technology
Identifiers
urn:nbn:se:kth:diva-244840 (URN)978-91-7873-108-4 (ISBN)
Public defence
2019-03-29, Ka-Sal B (Sal Peter Weissglas), Electrum, Kungl Tekniska högskolan, Kistagången 16, Kista, 10:00 (English)
Opponent
Supervisors
Note

QC 20190301

Available from: 2019-03-01 Created: 2019-02-28 Last updated: 2019-03-04Bibliographically approved

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Cheng, YuxinDe Andrade, MariletWosinska, LenaChen, Jiajia

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