9. A non-transitory computer-readable storage medium storing computer code that upon execution causes a reverse index system having one or more processors to partition search query terms to form partitioned sets of the search query terms, wherein the partitioning comprises partitioning the search query terms into the partitioned sets based on co-occurrence of given ones of the search query terms in a particular query, wherein co-occurrence of the given ones of the search query terms in the particular query comprises the given search query terms co-occurring in the particular query; distribute the partitioned sets of the search query terms to a plurality of index servers of said reverse index system, wherein the distributing includes generating a distribution map that maps the partitioned sets of the search query terms to corresponding ones of the plurality of index servers; use said distribution map to index links to content nodes to said partitioned sets of the search query terms; and use said distribution map for processing queries received from browser nodes.
9. A non-transitory computer-readable storage medium storing computer code that upon execution causes a reverse index system having one or more processors to partition search query terms to form partitioned sets of the search query terms, wherein the partitioning comprises partitioning the search query terms into the partitioned sets based on co-occurrence of given ones of the search query terms in a particular query, wherein co-occurrence of the given ones of the search query terms in the particular query comprises the given search query terms co-occurring in the particular query; distribute the partitioned sets of the search query terms to a plurality of index servers of said reverse index system, wherein the distributing includes generating a distribution map that maps the partitioned sets of the search query terms to corresponding ones of the plurality of index servers; use said distribution map to index links to content nodes to said partitioned sets of the search query terms; and use said distribution map for processing queries received from browser nodes. 15. The computer-readable storage medium of claim 9 , wherein using said distribution map for processing the queries comprises: mapping each of terms in a received given query using the distribution map to identify which of the index servers contains reverse index information for each corresponding term of the given query; and forwarding the given query to the identified index servers to retrieve links to said content nodes to obtain a result for the given query.