Thanks Joel, that link looks promising. The CloudSolrStream bypasses my issue of multiple shards. Perhaps the ReducerStream would provide what I need. At first glance I worry that the the buffer would grow too large - if its really holding the values for all the fields in each document (Tuple.getMaps()). I use a Map in my DelegatingCollector to store the "unique" docs, but I only keep the docId, my stats, and the ordinals for each field. Would you expect the new streams API to perform as well as my implementation of an AnalyticsQuery and a DelegatingCollector?
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