> 1) We index around 20 fields, of that we want to have grouping option > for five of them. For ex., user can search on name of the city and we > should have option to group by products available in that city (and > vice-versa). >
Are these fields stricly defined or free text? Because if they are product/dictionary fields then what you're looking for is not text clustering, but faceting and the solution is to use either SOLR or its components for doing exactly this. > 2) We also need an aggregation facility, which would allow to > aggregate certain field value from that group. For ex., sum the qty > for all the products in a category. The aggregation may not be part of > clustering, but could be something add-on to it. > This definitely looks like faceting. Take a look at Solr's faceting functionality -- I think this will solve your problem. Dawid
