Hi Ufuk, The Merge Blocks filter will work locally on each process and shouldn't move any of the data between MPI processes since it's a trivially parallel operation. When doing volume rendering of unstructured grids (the output dataset type of the merge blocks filter) with Ice-T in parallel, there will be data moved around in order to simplify and reduce the parallel communication by constructing convex partitions.
I don't know how NVIDIA's Index plugin works in parallel but my guess would be that it also wants convex partitions. Cheers, Andy On Thu, Sep 21, 2017 at 3:14 AM, Ufuk Utku Turuncoglu (BE) < [email protected]> wrote: > Hi Andy, > > Thanks for the clarification. One minor question, after applying Merge > Blocks is it still processing in serial mode or can i use MPI to improve > the performance? By the way, i am also using NVIDIA Index plugin. I think > that it supports parallel rendering but again not for multi block dataset. > Right? > > Regards, > > --ufuk > > > On 20/09/2017 22:12, Andy Bauer wrote: > > Hi Ufuk, > > ParaView doesn't currently support volume rendering of multiblock > datasets, even in serial, so using the Merge Blocks filter is probably the > best way to do any volume rendering of your dataset. > > Cheers, > Andy > > On Wed, Sep 20, 2017 at 2:45 PM, Ufuk Turuncoglu < > [email protected]> wrote: > >> Hi, >> >> I am trying to perform volume rendering (VR) using multi-block + >> multi-piece dataset. In this case, the data file has single block that >> contains multiple piece (created by MPI parallel simulation code) and it is >> in structured grid. When I try to use volume rendering with raw data, it >> creates empty output but if I use Merge Block filter before using volume >> rendering, it works without any problem. So, I have to use Merge Blocks >> to perform VR. At this point, I just wonder that is it typical behaviour >> of ParaView for multi-block + multi-piece datasets? Is it still possible >> to perform VR in parallel if I had a multiple core (such as enabling Auto >> MPI from the settings)? If not is there any way to re-structure the data to >> perform more efficient rendering? >> >> Best Regards, >> >> --ufuk >> >> >> >> >> _______________________________________________ >> Powered by www.kitware.com >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Please keep messages on-topic and check the ParaView Wiki at: >> http://paraview.org/Wiki/ParaView >> >> Search the list archives at: http://markmail.org/search/?q=ParaView >> >> Follow this link to subscribe/unsubscribe: >> http://public.kitware.com/mailman/listinfo/paraview >> >> > >
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