thanks for your kind words about Terrastore :)
The best way to update your data is by the means of a merge operation,
as follows:
curl -v -X POST -H "Content-Type: application/json" -d
"{\"*\":{\"score\" : 100}}" "http://127.0.0.1:8080/testbucket/1/merge"
The operation above merges your document with the provided update by
replacing the score attribute with the given value.
Merge updates are described in the following wiki pages:
http://code.google.com/p/terrastore/wiki/HTTP_Client_API#Merge_updates
http://code.google.com/p/terrastore/wiki/Developers_Guide#Merge_update
Feel free to hand us any questions about them.
Cheers,
Sergio B.
--
Sergio Bossa
http://www.linkedin.com/in/sergiob