Execution of Queries in Parallel: geotagged textual documents in Solrvvvv

[Massimiliano Ruocco]

I have around 100M of textual document geotagged (lat,long). THese 
documents are indexed with Solr 1.4. I am testing a retrieval model 
(written over Terrier). This model requires frequent execution of 
queries ( Bounding-box filter). These queries could be executed in 
parallel, one for each specific geographic tile.

I was wondering if exists a solution speeding up the execution of 
queries in parallel. My naif idea is Split the index in many parts 
according the geographical tiles (how to do that? SolrCloud? Solr Index 
Replication? What is the max number of eventual replication?)

Any practical further suggestion?

Thanks in advance

Massimiliano