[Swift-devel] How does swift know if a task is successful

[Ben Clifford]

On Wed, 18 Mar 2009, Zhao Zhang wrote:

> I think swift still needs to hold the 2nd stage computation until the 1st
> completes. If we simply remove
> the dependency, swift would send all jobs (both 1st and 2nd) out, right?

I don't meant the dependency between Swift jobs. That would still exist.

I mean make Swift so that it can start the next job when it has determined 
that the first job has completed successfully, with stageout happening 
separately.

At the moment, the dependencies are:

stagein(job A) < run(job A) < stageout(job A) < stagein(job B) < run(job b)

But they could become more like these two chains:

stagein(job A) < run(job A) < stagein(job B) < run(job b)
run(job A) < stageout(job A)

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