It makes much sense! Right now, it works by using the deprecated function (generating MPI::Vector from VectorBase).
The program can run successfully, while I now need to work on improve the efficiency (Maybe I need to rewrite all my previous code). Thank you so much for your help, David! Zhidong Brian Zhang On Saturday, December 7, 2019 at 5:50:05 PM UTC-5, David Wells wrote: > > Hi Zhidong, > > I am happy to help! > > Unfortunately, this is a part of deal.II that has some older code that > has accumulated some inconsistencies over time. Both inconsistencies > stem from there, previously, being a third class PETScWrappers::Vector > which was a sequential PETSc vector: both PETScWrappers::Vector and > PETScWrappers::MPI::Vector inherited from PETScWrappers::VectorBase. > Here VectorBase contained most of the functionality that didn't use or > need MPI objects. > > 1. I don't think that there is a workaround - the problem with that > function is that one could pass in a serial PETSc vector which doesn't > make any sense. Its not quite equivalent, but the closest replacement > is to just create a MPI::Vector and then extract the Vec rather than > creating a Vec and then putting it in an MPI::Vector. > 2. This is, mostly, a consequence of the historical design I mentioned > above: the end result is confusing because we have not completely > converted this class. Your understanding is correct except that > MPI::Vector is always a wrapper of VectorBase *where the Vec is a > parallel-distributed vector*. > > Does this make sense? > > Thanks, > David > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/98838502-087a-4df0-a625-6e7cb30545d2%40googlegroups.com.
