[petsc-dev] Scotch

[Barry Smith]

   Questions for anyone with knowledge on this subject:

      Are Scotch and ptscotch different packages? 

     How come the download site has scotch_5.1.11.tar.gz and scotch_5.1.11_esmumps.tar.gz and neither mentions ptscotch do one or both of them contain ptscotch? Do either contain scotch? What is the mumps business in the name?

     If this uses ptscotch why is the call in the source code SCOTCH_dgraphBuild()? and doesn't mention pt?

     If scotch and ptscotch are different shouldn't scotch.py be called ptscotch.py?  

     Pastix seems to use either scotch or ptscotch?  Will anyone ever fix the install of pastix.py for PETSc? Will that require a --download-scotch that installs sequential scotch?


    Barry





On Aug 19, 2011, at 6:10 PM, Jose E. Roman wrote:

> I have rewritten the Scotch interface so that it can be used again as a MatPartitioning object. I have done limited testing, so please let me know if problems arise.
> 
> The interface is really to PT-Scotch rather than serial Scotch.
> 
> Some comments regarding configure's download-scotch option:
> - It will probably fail in batch environments since the program 'dummysizes' must be run before compiling
> - Compilation requires lex & yacc, I don't know if these are tested by configure.
> 
> Jose
>