Administering and Monitoring SolrCloud Clusters

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Administering and Monitoring SolrCloud Clusters

  1. 1. Administering and Monitoring SolrCloud Rafał Kuć – Sematext Group, Inc. @kucrafal @sematext sematext.com
  2. 2. Ta me… Sematext consultant & engineer Solr.pl co-founder Father and husband 
  3. 3. SolrCloud Concepts Shard1 Replica Shard2 Replica Solr Server Solr Server Shard2 Shard1 Solr Server Solr Server Application
  4. 4. Local SolrCloud Cluster java -Dbootstrap_confdir=./solr/revolution/conf -Dcollection.configName=revolution -DzkRun -DnumShards=1 -jar start.jar Runs embedded ZooKeeper Bootstraps collection with 1 shards Starts Solr
  5. 5. Starting Solr Cluster No Collection No Collection -DzkHost=192.168.1.1:2181, 192.168.1.2:2181,192.168.1.3:2181 Solr Server -DzkHost=192.168.1.3:2181, 192.168.1.1:2181,192.168.1.2:2181 Solr Server No Collection No Collection -DzkHost=192.168.1.2:2181, 192.168.1.1:2181,192.168.1.3:2181 -DzkHost=192.168.1.3:2181, 192.168.1.1:2181,192.168.1.2:2181 Solr Server ZooKeeper ZooKeeper ZooKeeper Solr Server
  6. 6. Uploading Collection Configuration ./zkcli.sh -cmd upconfig -zkhost 192.168.1.1:2181 -confdir ./conf/ -confname revolution ZooKeeper Collection configuration ZooKeeper ZooKeeper Solr
  7. 7. Collections API Create Delete Reload Split Create Alias Delete Alias Shard Creation/Deletion http://wiki.apache.org/solr/SolrCloud
  8. 8. Collection Creation curl 'http://solrhost:8983/solr/admin/collections?action=CREATE &name=revolution&numShards=3&replicationFactor=4' name numShards replicationFactor maxShardsPerNode createNodeSet collection.configName
  9. 9. Collection Split Example $ curl 'http://solr1:8983/solr/admin/collections?action=CREATE& name=collection1&numShards=2&replicationFactor=1'
  10. 10. Collection Split Example $ curl 'http://localhost:8983/solr/admin/collections? action=SPLITSHARD&collection=collection1&shard=shard1'
  11. 11. Getting Deeper – CoreAdmin API curl 'http://solrhost:8983/solr/admin/cores?action=CREATE &name=newcore&collection=revolution&shard=shard2' collection shard numShards collection.configName
  12. 12. Schema – the API Reading (Solr 4.2) Fields Dynamic fields Types Copy fields Name (4.3) Version (4.3) Unique Key (4.3) Similarity (4.3) Writing (Solr 4.4) Adding new fields Adding copy fields
  13. 13. Reading Your Schema curl -XGET 'http://solrhost:8983/solr/rev/schema/fields/name' { "responseHeader" : { "status" : 0, "QTime" : 5 }, "field" : { "name" : "name", "type" : "text_general", "indexed" : true, "stored" : true } } Full reference: http://wiki.apache.org/solr/SchemaRESTAPI
  14. 14. Dynamic Schema Modifications <schemaFactory class="ManagedIndexSchemaFactory"> <bool name="mutable">true</bool> <str name="managedSchemaResourceName">managed-schema</str> </schemaFactory> curl -XPUT 'http://solrhost:8983/solr/rev/schema/fields/content' –d '{ "type" : "text", "stored" : "false", "copyFields" : ["catchAll"] }' curl -XPOST 'http://solrhost:8983/solr/rev/schema/copyFields' -d '[ { "source" : "name", "dest" : [ "text", "personal" ] } ]'
  15. 15. The Right Directory StandardDirectory SimpleFSDirectory NIOFSDirectory MMapDirectory _0.fdt _0.fdx _0.fnm _0.nvd _1.fdt _1.fdx _1.fnm _1.nvd NRTCachingDirectory RAMDirectory <directoryFactory name="DirectoryFactory" class="solr.NRTCachingDirectoryFactory" />
  16. 16. Segment Merging Level 0 a b f Level 1 c c d e g
  17. 17. Segment Merge Under Control Merge policy Merge scheduler Merge factor Merge policy configuration https://cwiki.apache.org/confluence/display/solr/IndexConfig+in+SolrConfig
  18. 18. Autocommit or Not? Automatic data flush (hard commit) Automatic index view refresh <autoCommit> <maxTime>15000</maxTime> <maxDocs>1000</maxDocs> <openSearcher>false</openSearcher> </autoCommit> <autoSoftCommit> <maxTime>1000</maxTime> </autoSoftCommit>
  19. 19. Caches Refreshed with IndexSearcher Configurable Different purposes Different implementations Solr Cache
  20. 20. Monitoring Importance
  21. 21. What to Pay Attention to?
  22. 22. Cluster State Health Shards and replica status Shard placement Failing nodes
  23. 23. Indexing Related Metrics Index throughput Document distribution I/O subsystem metrics Merging
  24. 24. Search - related Metrics Count Latency Distribution among nodes Anomalies and spikes
  25. 25. Monitoring Memory and GC Heap details Pool size Pool utilization Garbage collection count Garbage collection time
  26. 26. Monitoring OS Related Metrics CPU details Load I/O activity Network usage
  27. 27. Solr Administration Panel
  28. 28. Solr & JMX <jmx /> java -Dcom.sun.management.jmxremote –jar start.jar
  29. 29. Solr & JMX
  30. 30. SPM Index statistics Request # and latency Caches and warmup CPU JVM Memory and OS Memory Garbage collector OS related statistics
  31. 31. SPM Dashboard
  32. 32. Other Monitoring Tools Ganglia http://ganglia.sourceforge.net/ New Relic http://www.newrelic.com/ Opsview http://www.opsview.com
  33. 33. Too much is too much
  34. 34. Too hot
  35. 35. Caches
  36. 36. We Are Hiring ! Dig Search ? Dig Analytics ? Dig Big Data ? Dig Performance ? Dig working with and in open – source ? We’re hiring world – wide ! http://sematext.com/about/jobs.html
  37. 37. Thank You ! Rafał Kuć @kucrafal rafal.kuc@sematext.com Sematext @sematext http://sematext.com http://blog.sematext.com SPM discount code: LR2013SPM20 @ Sematext booth ;)

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