current tests

instance acquisition time for different number of instances and types
mostly compute map/reduce, execution time variance (vary number of instances)
task start up overhead, compare tradeoff of workload per task and load balance

AWS EC2 allocation policy

RolandPJ@AWS Posts: 586 Registered: 6/22/06

Re: Location of instances Posted: Aug 30, 2006 11:20 PM PDT in response to: Ben Strong Helpful Reply We are paying close attention to control over locality of instances, and please let us know in detail what your applications require in this regard. We currently have a placement algorithm that works as follows: 1. We will try to launch all of the instances of a single launch request in a single datacentre. 2. We will try to split your instances across at least two racks (for rack-level redundancy). 3. We will try not to place multiple instances on the same host machine. As you mention, this is not ideal for all applications.