Here is my early thoughts after quickly looking into Google Percolator and skimming the paper .
Major take-away: massive transactional mutating of tens-petabyte-scale dataset on thousands-node cluster is possible!
MapReduce is still useful for distributed sorts of big-data and few other things, nevertheless it’s “karma” has suffered a blow. Beforehand you could end any MapReduce dispute by . . . → Read More: Google Percolator: MapReduce Demise?