On Wed, Feb 2, 2011 at 12:28, Guzmán Llambías - INCO
<[email protected]> wrote:

> what happends with the provenance when I use Taverna's failover handler?
> which is the behaviour? It keeps track of the error and also the execution
> of the alternative service or only keeps track of the logical service? Are
> there any docs that I can look after?

I believe it does not yet record the individual invocations, just the
final outcome of the whole processor - so it does not reveal which
service was used - as the Provenance layer is quite high up in the
stack. It should be possible (as in: editing the XML) to move it
further down, if it's right above 'Invoke' it will be capturing
provenance for each service invocation.

It would not be able to record 'why' there's a second invocation - to
do that one would have to trace provenance up and down between each
layer to see where it bounced.

Do you want me to put down a feature request to capture provenance
information on alternative services, like what service was used, and
what errors was returned in the failed calls?

-- 
Stian Soiland-Reyes, myGrid team
School of Computer Science
The University of Manchester

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