The export handler does not do distributed search. So if you have a multi-shard collection you may have to use Streaming Expressions to get exports from all shards.
Joel Bernstein http://joelsolr.blogspot.com/ On Thu, Sep 27, 2018 at 4:32 AM Jan Høydahl <jan....@cominvent.com> wrote: > Hi, > > Yes, you can choose which to use, it should give you about same result. > If you already work with the Solr search API it would be the easiest for > you to consume /export as you don't need to learn the new syntax and parse > the Tuple response. However, if you need to do stuff with the docs as you > stream them from Solr, then streaming expressions lets you enrich the docs, > modify, join etc on the fly. > > PS: When the /export docs says it uses a streaming tecnique, it does NOT > mean that it has uses the solr feature streaming expressions :) > > -- > Jan Høydahl, search solution architect > Cominvent AS - www.cominvent.com > > > 27. sep. 2018 kl. 09:07 skrev Kamal Kishore Aggarwal < > kkroyal....@gmail.com>: > > > > Hi, > > > > I have a requirement to fetch all data from a collection. One way is to > use > > streaming expression and other way is to use export. > > > > Streaming expression documentation says *streaming functions are designed > > to work with entire result sets rather then the top N results like normal > > search. This is supported by the /export handler.* > > > > Also, Export handler documentation says *this feature uses a stream > sorting > > technique that begins to send records within milliseconds and continues > to > > stream results until the entire result set has been sorted and exported.* > > > > These two statements concludes to me that for fetching entire results > > streaming expressions uses export handler and export handler uses stream, > > so, whether I use streaming expression or export handler, they are > > internally same and would have same performance. I am correct over here > to > > say so ? > > > > > > Ref Links: > > > > https://lucene.apache.org/solr/guide/6_6/streaming-expressions.html > > https://lucene.apache.org/solr/guide/6_6/exporting-result-sets.html > > > > > > Regards > > Kamal Kishore > >
