How to get search result counts by field value for example the "search trends" feature?

[Zarrar Sikander <za...@gmail.com>]

Hi,

I am looking into being able to do search result trend graphs (example
Technorati or Indeed job trends) by keywords. How does one go about this
from nutch src or plugin implementation standpoint?

Basically I already have a date field (int minutes) for every record
in the index and need to get result totals by month. For example:

  search results for a given keyword:
  jan  feb  mar  apr  may
  23   24   55    67   97  ... (hit.getTotal() call. 5 queries)

I could do 5 independent range queries to get this data for each request
and dynamically generate a graph with JChart or similar tool but that might
be too costly.

Your reply can be very general as to point in the right direction. Any ideas

are welcome.

Thanks!