[Swift-devel] Re: replication vs site score

[Ben Clifford]

On Thu, 9 Apr 2009, Ian Foster wrote:

> I wanted to point out that when we use Falkon/coasters, we have full control
> over scheduling, so in that case we could in principle pre-compute schedules.

Coasters as they are now are still allocated on an opportunistic basis, so 
once we have a coaster stuff could be scheduled to it, but when coaster 
workers actually exist is as unknown as when jobs will run in the 
non-coaster case, I think.

Where Falkon has been used for pre-allocated resources on machines, with 
no dynamic allocation/unallocation, though, the available resources 
probably are known well enough for this.

> However, in practice we still don't tend to have enough information about
> execution times for this to be that useful. At least that's my belief.

yes.

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