Systems, methods, and computer products for information sharing using personalized index caching. Exemplary embodiments include a method including receiving a search query history from a node X in a node A, extracting characteristics of an index of the node A, searching the extracted characteristics, which include a file ID that is included in the index of the node A, adding metadata information to the index of the node A, in response to a determination that the node A includes at least one additional local metaindex, searching the at least one additional metaindex with the search query history from the node X in the node A, and merging search results with the metaindex of the node A, wherein the one additional metaindex merged to the metaindex of the node A includes an acquisition path, and sending the metaindex of the node A to the node X.