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Joel Bernstein edited comment on SOLR-7535 at 1/2/16 2:35 AM: -------------------------------------------------------------- A couple of possible streams: *PartitionStream*: writes to local disk partitioning on keys. Used when the next stage does not require a re-sort. *ShuffleStream*: writes to local disk sorting and partitioning by keys. Used when the next stage requires a re-sort. *HttpStream*: Gets passed a list of nodes to read a stream from. This would read directly from worker nodes. We could simply point directly to the files and let jetty stream the data back directly. Step1: parallel(partition(innerJoin(search, search) Step 2: parallel(hashJoin(read, search) The PartitionStream would return a Tuple when it's finishing writing the partitions that includes its node address. There would need to be a little glue code that would gather the node addresses from step 1 and kick off step 2. This could be written in any language. The SQLHandler will of course perform the steps behind the scene. was (Author: joel.bernstein): A couple of possible streams: PartitionStream: writes to local disk partitioning on keys. Used when the next stage does not require a re-sort. ShuffleStream: writes to local disk sorting and partitioning by keys. Used when the next stage requires a re-sort. ReadStream: Gets passed a list of nodes to read a stream from. This would read directly from worker nodes. We could simply point directly to the files and let jetty stream the data back directly. Step1: parallel(partition(innerJoin(search, search) Step 2: parallel(hashJoin(read, search) The PartitionStream would return a Tuple when it's finishing writing the partitions that includes its node address. There would need to be a little glue code that would gather the node addresses from step 1 and kick off step 2. This could be written in any language. The SQLHandler will of course perform the steps behind the scene. > 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, 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org