[petsc-users] KSP convergence

[Ataollah Mesgarnejad]

Dear all,

I use KSPSetInitialGuessNonzero for my KSP solver and it works perfectly. But when I restart my computations (I read petsc binaries and set up my fields) the first KSP solve takes forever. I guess my question is: is there a way to set the initial guess for KSP back to where it was before termination (i.e. write the KSP out) or set it to be a predefined vector?

Thanks,
Ata