[Swift-devel] Re: replication vs site score

[Ben Clifford]

On Wed, 8 Apr 2009, Mihael Hategan wrote:

This:

> planning the whole workflow buys us little in a (very) dynamic
> environment in which submitting a job one minute later may mean the
> difference between 1 minute of queue time and one hour of queue time

and this:

> You need some SLA/QOS to address that.

seem to be significant characteristics that make the environments we run 
on not amenable to scheduling in the traditional sense. The lack of any 
meaningful guarantees about almost anything time-related makes everything 
basically opportunistic rather than scheduled.

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