same speed
it frequent word became the only word of search query - it's dramatically slows down.
Version of ElasticSearch 5.5, modification - Elassandra - uses cassandra as doc storage instead of Lucene.
Tryed to launch on ElasticSearch in usual edition - same thing.
Version of Elasticsearch 5.5, modification - Elassandra - uses cassandra as doc storage instead of Lucene.
That's not correct. Still using Lucene but not the local File System.
Could you try similar test on 6.2.1? I think there have been some improvements recently.
Then share more details (when you don't test with Elassandra as we can't support it).
Is it's possible that while ShardCount in Elassandra == nodes count of Cassandra that it uses - it's too less shards for optimal query execution?
I don't know but please run your tests without Elassandra or ask on the Elassandra forums where you get a better chance to get help about their product.
Note elassandra still using local File System.
It has 1 shard-per-keyspace in "default scenario", so each search will be single-threaded in that node. Have you tried adding "sort: _doc" ? And when you run the query again it's not cached (the one with filter) ?
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