(R) Evolution Philipp Krenn 44444444 @xeraa
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Revolution
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https://db-engines.com/en/ranking
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https://www.reddit.com/r/SQL/comments/7i828i/ms_sql_query_is_too_complex/
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Who uses Elasticsearch?
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Infrastructure | Developer Advocate
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http://thedudeabides.com/articles/ the_birth_of_compass
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Terms Cluster, Node, Index, Shard, Document, ID
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$ curl http: //localhost:9200 {
"name" : "elasticsearch1" ,
"cluster_name" : "docker-cluster" ,
"cluster_uuid" : "l6wfwv8XSniiI_Fx6qqrcw" ,
"version" : {
"number" : "5.6.9" ,
"build_hash" : "877a590" ,
"build_date" : "2018-04-12T16:25:14.838Z" ,
"build_snapshot" : false ,
"lucene_version" : "6.6.1" },
"tagline" : "You Know, for Search" }
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$ curl http: //localhost:9200 {
"name" : "elasticsearch1" ,
"cluster_name" : "docker-cluster" ,
"cluster_uuid" : "l6wfwv8XSniiI_Fx6qqrcw" ,
"version" : {
"number" : "5.6.9" ,
"build_hash" : "877a590" ,
"build_date" : "2018-04-12T16:25:14.838Z" ,
"build_snapshot" : false ,
"lucene_version" : "6.6.1" },
"tagline" : "You Know, for Search" }
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Evolution
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Questions: https://sli.do/xeraa Answers: https://twitter.com/xeraa
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Strictness * 5.0 * Demo
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Bootstrap Checks https://www.elastic.co/guide/en/elasticsearch/ reference/current/bootstrap-checks.html
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Parameters & Configs
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Rolling Upgrades * 6.0 * Demo
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Floodstage Watermark * 6.0 * Demo
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Low 85% High 90% Floodstage 95%
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Sequence Numbers * 6.0 * Demo
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63 bits ought to be enough for anyone.
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Tradeoff index.translog.retention.size: 512MB index.translog.retention.age: 12h
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Cross Datacenter Replication 6.x or 7.x
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Types * 5.6 to 8.0 * Demo
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Why Data types Sparsity Scoring
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How 5.6 opt-in single type 6.x single type 7.x type optional in API 8.x no more types https://www.elastic.co/guide/en/elasticsearch/reference/current/ removal-of-types.html#_schedule_for_removal_of_mapping_types
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Automatic Queue Resizing 6.0
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Reject and Retry Instead of Long Queues thread_pool.search.target_response_rate: 2s Serving 50 requests/s Queue size:
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Adaptive Replica Selection 6.1 (enabled by default in 7.0)
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Pick Best Shard Exponentially Weighted Moving Average (EWMA) Piggyback on responses to coordinating node
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Shrink & Split * 4 5.0 444 6.1 * Demo
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Shrink Combine shards by a factor
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Split Split into a factor of number_of_routing_shards Not required in 7.0+
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Shards 7.0
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Default: 1 shard per index Oversharding
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Benchmarks ∞
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Rally https://elasticsearch-benchmarks.elastic.co
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Conclusion
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Strictness Rolling Upgrades Floodstage Watermark Sequence Numbers Types
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Automatic Queue Resizing Adaptive Replica Selection Shrink & Split Default Shard Number
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https://www.meetup.com/Greece-Elastic/ Monday 19:00, The Cube Athens
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Questions? Philipp Krenn 4444444 @xeraa
