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https://issues.apache.org/jira/browse/SOLR-7535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15073912#comment-15073912
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Joel Bernstein commented on SOLR-7535:
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Yes, you've described what I was thinking correctly.
I think swallowing the Tuples is the correct behavior. Imagine 15 workers
pulling Tuples from 20+ shards. The throughput would bottleneck if we funneled
all those tuples back to one client.
Think of the returned tuple as a type of useful aggregation like the
RollupStream, which swallows Tuples on the worker nodes and returns aggregates
to one client.
> Add UpdateStream to Streaming API and Streaming Expression
> ----------------------------------------------------------
>
> Key: SOLR-7535
> URL: https://issues.apache.org/jira/browse/SOLR-7535
> Project: Solr
> Issue Type: New Feature
> Components: clients - java, SolrJ
> Reporter: Joel Bernstein
> Priority: Minor
> Attachments: SOLR-7535.patch
>
>
> The ticket adds an UpdateStream implementation to the Streaming API and
> streaming expressions. The UpdateStream will wrap a TupleStream and send the
> Tuples it reads to a SolrCloud collection to be indexed.
> This will allow users to pull data from different Solr Cloud collections,
> merge and transform the streams and send the transformed data to another Solr
> Cloud collection.
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