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Time4: Time for SDN

Tal Mizrahi, Yoram Moses
2016 IEEE Transactions on Network and Service Management  
In this paper we introduce Time4, an approach that uses accurate time to coordinate network updates.  ...  Time4 is a powerful tool in softwarized environments, that can be used for various network update scenarios.  ...  Accurate time is a powerful abstraction for SDN programmers, not only for flow swaps, but also for timed consistent updates, as discussed by [26] .  ... 
doi:10.1109/tnsm.2016.2599640 fatcat:jopfbsmu25bvjenfnljt3dnfui

Guest Editors' Introduction: Special Issue on Management of Softwarized Networks

Filip De Turck, Prosper Chemouil, Raouf Boutaba, Minlan Yu, Christian Esteve Rothenberg, Kohei Shiomoto
2016 IEEE Transactions on Network and Service Management  
In "Time4: Time for SDN", Mizrahi and Moses [16] present a new approach for path reconfiguration in SDN networks, while minimizing disruptions during network updates.  ...  The upgrade strategy to gradually deploy SDN nodes over time is considered in detail, taking into account budget constraints for the upgrade cycles.  ...  and Management, the Chair of the Future Internet Cluster of the European Commission, and is on the TPC of many network and service management conferences and workshops and serves on the editorial board for  ... 
doi:10.1109/tnsm.2016.2598093 fatcat:f37wjaibmjf2nlggmsjpylh2sa

Timing in Software-Defined and Centrally-Managed Networks [article]

Tal Mizrahi, Yoram Moses
2019 arXiv   pre-print
The work described in this paper explores the use of time and synchronized clocks in centrally-managed and Software Defined Networks (SDNs).  ...  One of the main goals of this work is to analyze use cases in which explicit use of time is beneficial.  ...  The work of [7] , [3] considers a class of network update scenarios called flow swaps, and shows that TIME4 is the optimal approach for implementing them; TIME4 allows fewer packet drops and higher  ... 
arXiv:1904.06676v1 fatcat:njot7fjc7bbidhgfu3mz2eyoia

On the importance of time-synchronized operations in Software-Defined electronic and optical networks

Miquel Garrich, Abubakar Siddique Muqaddas, Paolo Giaccone, Andrea Bianco
2017 2017 19th International Conference on Transparent Optical Networks (ICTON)  
Alternatively GPS can also be used as backup for the reference clock. SUMMARY Time-synchronized operations (TSO) are in a nascent stage within the paradigm of SDN.  ...  Moreover, an improved version of PTP for SDN networks, named ReversePTP [20] , can be used in which the SDN controller keeps track of the clock offsets for each data plane element.  ... 
doi:10.1109/icton.2017.8025133 fatcat:wsmmwalgcrcplhjgzq3aarddmy

The Road to BOFUSS: The Basic OpenFlow User-space Software Switch [article]

Eder Leao Fernandes, Elisa Rojas, Joaquin Alvarez-Horcajo, Zoltan Lajos Kis, Davide Sanvito, Nicola Bonelli, Carmelo Cascone, Christian Esteve Rothenberg
2019 arXiv   pre-print
Software switches are pivotal in the Software-Defined Networking (SDN) paradigm, particularly in the early phases of development, deployment and testing.  ...  BOFUSS has been widely used in the research community for diverse reasons, but it lacked a proper reference document.  ...  Time4 [46] reuses the bundle feature to implement an approach for network updates (actually adopted in OpenFlow 1.5).  ... 
arXiv:1901.06699v1 fatcat:p6osrplozvfszdi2guervcuyai

Chronus: Consistent Data Plane Updates in Timed SDNs

Jiaqi Zheng, Guihai Chen, Stefan Schmid, Haipeng Dai, Jie Wu
2017 2017 IEEE 37th International Conference on Distributed Computing Systems (ICDCS)  
Motivated by the advent of tightly synchronized SDNs, we in this paper initiate the study of algorithms for consistent network updates in "timed SDNs"-SDNs in which individual node updates can be scheduled  ...  Software-Defined Networks (SDNs) introduce interesting new opportunities in how network routes can be defined, verified, and changed over time.  ...  ACKNOWLEDGMENTS We thank the anonymous reviewers for their helpful comments on drafts of this paper. The work is partly  ... 
doi:10.1109/icdcs.2017.96 dblp:conf/icdcs/ZhengCSD017 fatcat:74bayehrofditgr2fblzpnova4

Inedited Chapters of Jehudah Hadassi's "Eshkol Hakkofer"

W. Bacher
1896 Jewish Quarterly Review  
That which gives the controversy of Jehudah Hadassi, published here for the first time4, a character of its own, consists in the combination of his attacks upon Christianity with those upon Rabbinical  ...  :51K JI p o D 1tWi Trn pn pin lYnpi l :F5s p: 7vn^sDn 75rn r:iuna p ]nt: 13DK1: ,n 'WK: ,nl?  ... 
doi:10.2307/1450078 fatcat:3xl3xrmyhzhedhheudrfby3gni

Shafiee_columbia_0054D_16367.pdf [article]

Data centers are the host for execution of various data-parallel applications.  ...  Resource allocation in large-scale distributed systems Mehrnoosh Shafieezade Abade The focus of this dissertation is design and analysis of scheduling algorithms for distributed computer systems, i.e.,  ...  rates so as to complete orange coflow at time 2. flows of green coflow at time 2 and rate assignment to complete its flows at time4.  ... 
doi:10.7916/d8-0mn6-3679 fatcat:ejvfactjjffbhpl2k35aq36m4u