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Posted to dev@lucene.apache.org by "Joel Bernstein (JIRA)" <ji...@apache.org> on 2017/01/06 16:54:58 UTC
[jira] [Updated] (SOLR-9938) Improve the performance of
CloudSolrStream
[ https://issues.apache.org/jira/browse/SOLR-9938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joel Bernstein updated SOLR-9938:
---------------------------------
Description:
Now that we have started to improve the efficiency of Streaming, I think it makes sense to work on CloudSolrStream, which is used as a bulk stream source.
The first thing to tackle is how the merge sort of the SolrStreams from each shard is done.
Currently the sorting is done by a TreeSet, which is not the most efficient approach. For one thing each *put* and *poll* on the TreeSet creates a new map Entry. When streaming millions of documents this adds up. Also the TreeSet is backed by a TreeMap that maintains a fully ordered set of tuples. We just need to know the highest Tuple on each read().
I think we can increase throughput significantly by using a custom priority queue for sorting rather then the TreeSet.
was:
Now that we have started to improve the efficiency of Streaming, I think it makes sense to work on CloudSolrStream, which is used as a bulk stream source.
The first thing to tackle is how the merge sort of the SolrStreams from each shard is done.
Currently the sorting is done by a TreeSet, which is not the most efficient approach. For one thing each *put* and *poll* on the TreeSet creates a new map Entry. When streaming millions of documents this adds up. Also the TreeSet is backed by a TreeMap that maintains a fully order set of tuples. We just need to know the highest Tuple.
I think we can increase throughput significantly by using a custom priority queue for sorting rather then the TreeSet.
> Improve the performance of CloudSolrStream
> ------------------------------------------
>
> Key: SOLR-9938
> URL: https://issues.apache.org/jira/browse/SOLR-9938
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
>
> Now that we have started to improve the efficiency of Streaming, I think it makes sense to work on CloudSolrStream, which is used as a bulk stream source.
> The first thing to tackle is how the merge sort of the SolrStreams from each shard is done.
> Currently the sorting is done by a TreeSet, which is not the most efficient approach. For one thing each *put* and *poll* on the TreeSet creates a new map Entry. When streaming millions of documents this adds up. Also the TreeSet is backed by a TreeMap that maintains a fully ordered set of tuples. We just need to know the highest Tuple on each read().
> I think we can increase throughput significantly by using a custom priority queue for sorting rather then the TreeSet.
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