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SUMMARY:Faithful Reproduction of Network Experiments - Dimosthenis Pediadi
 takis (University of Cambridge)
DTSTART:20141013T150000Z
DTEND:20141013T153000Z
UID:TALK54759@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:The proliferation of cloud computing has compelled the researc
 h community to rethink fundamental design aspects of networked systems. \n
 However\, the tools commonly used to evaluate new ideas have not kept abre
 ast of the latest developments. Common simulation and emulation frameworks
  fail to provide scalability\, fidelity\, reproducibility and execute unmo
 dified code\, all at the same time.\n\nWe present SELENA\, a Xen-based net
 work emulation framework that offers fully reproducible experiments via it
 s automation interface and supports the use of unmodified guest operating 
 systems. This allows out-of-the-box compatibility with common applications
  and OS components\, such as network stacks and filesystems. In order to f
 aithfully emulate faster and larger networks\, SELENA adopts the technique
  of time dilation and transparently slows down the passage of time for gue
 st  operating systems. This technique effectively virtualizes the availabi
 lity of host’s hardware resources and allows the replication of scenario
 s with increased I/O and computational demands. Users can directly control
  the trade-off between fidelity and running-times via intuitive tuning kno
 bs. \nWe evaluate the ability of SELENA to faithfully replicate the behavi
 or of real systems and compare it against existing popular experimentation
  platforms. Our results suggest that SELENA can accurately model networks 
 with aggregate link speeds of 44 Gbps or more\, while improving by four ti
 mes the execution time in comparison to ns3 and exhibits near-linear scali
 ng properties.\n\n
LOCATION:SS03\, Computer Laboratory\, William Gates Builiding
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