Mikhail Khludnev created SOLR-12408:
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Summary: Introduce parallelShards() in Streaming Expressions
Key: SOLR-12408
URL: https://issues.apache.org/jira/browse/SOLR-12408
Project: Solr
Issue Type: New Feature
Security Level: Public (Default Security Level. Issues are Public)
Components: streaming expressions
Reporter: Mikhail Khludnev
{{parallel()}} uses hash filter partitioning, which doesn't work in some edge
cases with high cardinality facets since they kill coordinator.
I propose to introduce {{parallelShards()}} which will accepts a collection,
and spawns per-shard substreams (I'm not sure wether to use {{distrib=false}}
or {{shards=foo}}). So, far it's not clear whether {{workerCollection}} is
beneficial for it at all.
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