On 01/02/2012 07:48, Prashant Bandal wrote: > Hi, Hello
> We are evaluating workflow engines for our project and Taverna is one > of the workflow engines we have shortlisted > > We are looking for following features: > > 1. Parallel execution and configurable number of concurrent > threads/node. Yes, Taverna calls services in parallel and you can configure the number of allowed concurrent calls of a service - see http://www.youtube.com/watch?v=ONWqJV_5IAI > 2. Add, edit, run and save any workflow programmatically. Stian has sent details on SCUFL2. David Withers can send details of the Taverna > > 3. Workflows and customized components can be saved, reused, > and shared The workflows can be saved, reused and shared. For some customized components, such as beanshells, R and tool services, it is possible to save the script or tool description. There is currently no mechanism for sharing such components although work will be done on the BioVeL and related projects on a component catalogue. > 4. Workflows can be nested, allowing complex tasks to be > composed from simpler components, and enabling workflow designers to > build re-usable, modular sub-workflows that can be saved and used for > many different applications. Taverna can do this. See http://www.mygrid.org.uk/dev/wiki/display/taverna/Nested+workflows > 5. Command line execution of workflows Taverna 2.3 (and previous versions) has a command line tool see http://www.mygrid.org.uk/dev/wiki/display/taverna/Command+Line+Tool A prototype of the Taverna 3 command line tool and OSGi platform is currently being prepared for release. I think the SCUFL2 may go out today. > 6. Do we have client-server support, and how easy it to > configure? There is a Ruby Gem for talking to the Taverna 2.2 server and it is being updated for the Taverna 2.3 server (to simplify the API and also to add in support for passing across security credentials so that secured services can be invoked). There are also Java portlets for talking to the Taverna 2.2 server. In addition to the Ruby Gem, a jar of the corresponding Java classes is being created for the Taverna 2.3 server. There is a VM to try out the Taverna server and the Ruby Gem. See http://www.taverna.org.uk/download/server/client-side-stuff/ What exactly do you want to configure? > 7. Workflows can leverage the computational power of > cluster/grid technologies . There are a number of plugins for calling services on a grid - see http://www.taverna.org.uk/documentation/taverna-plugins/taverna-2-x-plugins/ A number of projects use Taverna to invoke services running on a grid see http://www.taverna.org.uk/introduction/taverna-in-use/ If you have a particular grid in mind, then please ask. > 8. Handling large amount of data In my opinion, a workflow engine should not be handling large amounts of data. It is very inefficient and rarely useful. It is better for references to such data to be passed between services. > It has come to our attention that these features will be available > with SCUFL2 and Taverna 3 which is supposed to be releasing this > month. Is it possible to get early access to a testable (server) > version of Taverna 3 If yes please provide SVN URL for download. Stian is currently preparing the release of SCUFL2. The Taverna 3 platform that is being prepared is the Taverna 3 engine + activities and the associated command line tool. It is not a Taverna 3 server nor a Taverna 3 workbench. The API for submitting workflows to a Taverna 3 server is expected to be very similar to that for the Taverna 2.3 server. > One more question we have is how Taverna is different from other > workflow engines such as Kepler. That is a difficult question to answer quickly. Can you narrow down the capabilities you want compared? > Thank you. > > Regards, Prashant Bandal Alan ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ taverna-users mailing list [email protected] [email protected] Web site: http://www.taverna.org.uk Mailing lists: http://www.taverna.org.uk/about/contact-us/
