[MOBY-dev] Moby Collections in Taverna

[Dirk Haase]

Hi all,

I noticed that the handling of Moby collection outputs has changed in Taverna. 
Formerly (until version 1.2), a collection of n objects was processed with n 
invocations of the following step in the workflow.

Now (version 1.3.1) this is done with only one invocation with n distinct 
queries (mobyData blocks). That's nice, because it reduces overhead. The 
downside is that for large collections this will inescapably lead to timeout 
problems. For our blast services for example I observed a limit of about 20 
queries per invocation.

I also found that the old multi-invocation behavior is still accessible by 
using the non-moby 'output' port. However I'm not sure if this is really the  
intended way...

I think the optimal solution would be to have a 
'max-number-of-queries-per-invocation' parameter to be set in the workflow 
definition. Is that feasible?

Regards,
dirk

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Dirk Haase		            phone +49 89 3187 3583
http://mips.gsf.de/~haase           email   d.haase at gsf.de