How to host and serve a large geojson as smaller data files

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This is a general question that I am asking in the hopes of getting guidance in how to tackle the problem.

Let's say I have a large data file -- say it is 100mb, geojson, say at the census-tract level with data bound for each shape.

I need to do two things in the best way. I am open to using existing service, such as Cartodb.

1. I need to cut the geojson and/or the dataset into smaller units so it can be served to lower map zoom levels and be loaded into the browser in a manageable file size.
2. I need to serve up the geojson and/or dataset from a service. This could be Tilestache/Mapnik or an Postgis/SQL-based service such as Cartodb.

What are some of the ways to solve this problem?



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