Hi,
Is it faster to make one query with filters and Y facets, instead of
making Y queries with filters and one facet ?
ElasticSearch will iterate on all filtered documents, and apply the
facet algorithms on each of them ? I guess it won't reiterate on all
filtered documents for each facet ? Seems obvious, but I just need to
be 100% sure.
And what happens if the facets have filters ? Do ES merge the query
and facet filters and make one query ? So it would need to do that for
each facets ?
Thanks.
I'd imagine that the only way to be 100% sure is to try it 
If you're not yet at the point where you have data to run it on, then
you may well be optimising prematurely. It could be fast enough either
way.
Still, I agree that it would be interesting to know more about how the
algorithms work (unfortunately I don't know either).
Cheers,
Chris
On Tue, Jun 28, 2011 at 7:33 PM, Nicolas Fouché
nicolas.fouche@gmail.com wrote:
Hi,
Is it faster to make one query with filters and Y facets, instead of
making Y queries with filters and one facet ?
Elasticsearch will iterate on all filtered documents, and apply the
facet algorithms on each of them ? I guess it won't reiterate on all
filtered documents for each facet ? Seems obvious, but I just need to
be 100% sure.
And what happens if the facets have filters ? Do ES merge the query
and facet filters and make one query ? So it would need to do that for
each facets ?
Thanks.
Hi,
Facets are calculated as a one pass on the query (putting aside global facets here), even if they have facet filters (which just filter out docs from the facet calculation).
-shay.banon
On Tuesday, June 28, 2011 at 4:08 PM, Chris Berkhout wrote:
I'd imagine that the only way to be 100% sure is to try it
If you're not yet at the point where you have data to run it on, then
you may well be optimising prematurely. It could be fast enough either
way.Still, I agree that it would be interesting to know more about how the
algorithms work (unfortunately I don't know either).Cheers,
ChrisOn Tue, Jun 28, 2011 at 7:33 PM, Nicolas Fouché
<nicolas.fouche@gmail.com (mailto:nicolas.fouche@gmail.com)> wrote:Hi,
Is it faster to make one query with filters and Y facets, instead of
making Y queries with filters and one facet ?
Elasticsearch will iterate on all filtered documents, and apply the
facet algorithms on each of them ? I guess it won't reiterate on all
filtered documents for each facet ? Seems obvious, but I just need to
be 100% sure.
And what happens if the facets have filters ? Do ES merge the query
and facet filters and make one query ? So it would need to do that for
each facets ?
Thanks.