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SUMMARY:Wide-area migration of Virtual Machines including local persistent
  state - Evangelos Kotsovinos\, T-Labs
DTSTART:20070510T153000Z
DTEND:20070510T163000Z
UID:TALK7332@talks.cam.ac.uk
CONTACT:Wenjun Hu
DESCRIPTION:So far virtual machine (VM) migration has focused on transferr
 ing the run-time memory state of the VMs in local-area networks (LAN). How
 ever\, for wide-area network (WAN) migration it is crucial to not just tra
 nsfer the VMs image but also transfer its local persistent state (e.g. fil
 e system)\, and its on-going network connections. In this paper we address
  both: by combining a block-level solution with pre-copying and write thro
 ttling we show that we can transfer an\nentire running web server (includi
 ng its local persistent state) with minimal disruption (three seconds in t
 he LAN and 68 seconds in the WAN)\; by combining dynDNS with tunneling\, e
 xisting connections can continue transparently while new ones are redirect
 ed to the new network location. Thus we show experimentally that by combin
 ing well-known techniques in a novel manner we can provide system support 
 for migrating virtual execution environments in the wide area.
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Builiding
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