On Dec 31, 2010, at 12:28 PM, Matthew Knepley wrote: > On Fri, Dec 31, 2010 at 12:23 PM, Peter Wang <pengxwang at hotmail.com> wrote: > I am trying to build a big matrix to be solved by KSP. I am wondering is > there any limitation to the matrix size? What is the maximum size of the > matrix in KSP? For example, if a 100 M by 100 M matrix can be handled by the > KSP? Thanks a lot. > > There are two limitations: > > a) Machine memory. To combat this, we recommend running in parallel > > b) Representation of row/col numbers by integers. If you have > 2B rows, > you will need to reconfigure > using --with-64-bit-ints.
--with-64-bit-indices > > Thanks, > > Matt > > -- > What most experimenters take for granted before they begin their experiments > is infinitely more interesting than any results to which their experiments > lead. > -- Norbert Wiener
