[petsc-users] about BDDC preconditioner

[Jed Brown]

"Zhenglun (Alan) Wei" <zhenglun.wei at gmail.com> writes:

> Dear All,
> I hope you're having a nice day.
> I'm trying to use BDDC as a preconditioner. The executable command is:
> /mpiexec -np 8 ./ex45 -pc_type bddc -ksp_type cg -ksp_rtol 1.0e-7
> -log_summary//

This example does not assemble in MATIS format, so it cannot be used
with BDDC.

> ///However, it say:
> /[//0]PETSC ERROR: --------------------- Error Message
> ------------------------------------//
> //[0]PETSC ERROR: Unknown type. Check for miss-spelling or missing
> external package needed for type://
> //see
> http://www.mcs.anl.gov/petsc/documentation/installation.html#external!//
> //[0]PETSC ERROR: Unable to find requested PC type bddc!//

Configure --with-pcbddc.

This will be enabled by default soon.