jm + long-tail + ec2   1

'Bobtail: Avoiding Long Tails in the Cloud' [pdf]
'A system that proactively detects and avoids bad neighbouring VMs without significantly penalizing node instantiation [in EC2]. With Bobtail, common [datacenter] communication patterns benefit from reductions of up to 40% in 99.9th percentile response times.'

Excellent stuff -- another conclusion they come to is that it's not the network's fault, it's the Xen hosts themselves. The EC2 networking team will be happy about that ;)
networking  ec2  bobtail  latency  long-tail  xen  performance 
february 2014 by jm

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