David,

Much appreciated. This gives me enough to work with. 
I missed one important point. Our data changes pretty frequently which mean
we may be running deltas every 5-10 minutes. in-memory should work
thanks





David Smiley @MITRE.org wrote:
> 
> You'll probably want to influence your relevancy on this popularity number
> that is changing often.  ExternalFileField looks like a possibility though
> I haven't used it.  Another would be using an in-memory cache which stores
> all popularity numbers for any data that has its popularity updated since
> the last index update (say since the previous night).  On second thought,
> it may need to be absolutely all of them but these are just #s so no big
> deal?  You could then customize a "ValueSource" subclass which gets data
> from this fast in-memory up to date source.  See FileFloatSource for an
> example that uses a file instead of an in-memory structure.
> 
> ~ David Smiley
> Author: http://www.packtpub.com/solr-1-4-enterprise-search-server/
> 
> 
> On Mar 18, 2010, at 2:44 PM, caman wrote:
> 
>> 2) Any input on 2 please? I need to store # of views and popularity with
>> each document and that can change pretty often. Recommended to use
>> database
>> or can this be updated to SOLr directly? My issue with DB is that with
>> every
>> SOLR search hit, will have to do DB hit to retrieve meta-data. 
>> 
>> Any input is appreciated please
> 
> 
> 
> 

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