OK, the 'k iterations' happen inline in one job? I thought the Lanczos algorithm found the k eigenvalues/vectors one after the other. Yeah I suppose that doesn't literally mean k map/reduce jobs. Yes the broader idea was whether or not you might get something useful out of ALS earlier.
On Mon, Mar 25, 2013 at 11:06 AM, Ted Dunning <ted.dunn...@gmail.com> wrote: > SVD need not be iterative at all. The SSVD code uses roughly 5 map-reduces > to give you a high quality SVD approximation. There is the option to add > 0, 1 or more extra iterations, but it is rare to need more than 1. > > ALS could well be of use after less work. This is especially try for > incremental solutions.
