Hi, I'd like to understand this paragraph in the Accumulo manual a little better:
"The only restriction on an combining iterator is that the combiner developer should not assume that all values for a given key have been seen, since new mutations can be inserted at anytime. This precludes using the total number of values in the aggregation such as when calculating an average, for example." By "using the total number of values in the aggregation", I presume that it means inside the combiner's reduce method? Because it seems like if I'm using the example StatsCombiner registered on all 3 scopes, after the scan completes the count and the sum fields should be consistent (w.r.t each other, of course new mutations could have been added since the scan started) and if I divide the two I'll get an accurate average, right? Thanks, -Russ
