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From Mikhail Khludnev <>
Subject Huge Facets and Streaming
Date Mon, 21 Aug 2017 10:01:39 GMT

I need to count really wide facet on 30 shards index with roughly 100M
docs, the facet response is about 100M values takes 0.5G in text file.

So, far I experimented with old facets. It calculates per shard facets
fine, but then a node which attempts to merge such 30 responses fails due
to OOM. It's reasonable.

I suppose I'll get pretty much same with json.facet, or it's better

I want to experiment with Streaming Expression, which I've never taken yet.
I've found facet() expression and select() with partitionKeys they'll try
to merge facet values in FacetComponent/Module anyway.
Is there a way to merge per-shard facet responses with Streaming?

Sincerely yours
Mikhail Khludnev

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