FYI, there's an open ticket to improve sharding on geo-indexes. It works, but isn't as efficient as it could be:
https://jira.mongodb.org/browse/SERVER-1982On Monday, June 18, 2012 5:02:18 PM UTC-4, illumine wrote:
I'm interested in any cases where people have used geo-indexes as the sharding indexes for their clusters. In particular, I'm using lat/long values as floats.Thanks!