Logistical Networking:Buffering in the Network

Prof. Martin Swany, Ph.D.Department of Computer and

Information Sciences

Network Logistics and Buffering• Logistics is time-related positioning of

resources• Buffers are temporary storage areas used

when transferring data• Storage has a continuum of persistence and

durability• Network devices have some buffer capacity• High-performance I/O depends on buffering

at various levels

Logistical Networking• Logistical Networking improves data movement

performance and functionality via buffering across a range of parameters and layers

• Logistical Session Layer / Phoebus• Plentiful, highly transitory, moderate capacity• Buffer duration from milliseconds to minutes• Implements “Store and Forward” along the end-to-end path

for improved throughput• Internet Backplane Protocol / REDDnet

• Less plentiful, more persistent, significant capacity• Buffer duration from minutes to months• Implements “Working Storage” used in general distributed

applications

DCN

End-to-EndSession

Internet2 Deployment (in progress)

• Phoebus nodes at router POPs

Internet2 Phoebus Gateway

ClusterSupercomputer

depots

End User

End User

End User

Producer Consumer

7

Integrated LN Suite• Together, Phoebus and IBP implement

integrated buffering at all scales• Wide range of performance improvement

and functionality for scalable I/O and data movement• Pipelining• Caching

Users, Collaborators, Support• Users include Terascale Supernova Initiative, DOE

Fusion, CMS, LIGO, AmericaView, National Geospatial Data Archive, Library of Congress, …

• Support from the NSF, DOE, Library of Congress, Internet2

• University of Delaware, University of Tennessee, Vanderbilt University, Stephen F. Austin State University

End• Thank you for your attention• Questions?