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Scaling Solr with SolrCloud

Rafał Kuć – Sematext Group, Inc.@kucrafal @sematext sematext.com

Ta me…

Sematext consultant & engineerSolr.pl co-founderFather and husband

Solr History

2004

2006

2007

2008

2009

2010

2012

2013

Y. Seeley creates Solr

Incubator graduation

Solr 1.4 released

Solr 4.0 released

Solr 4.1 and counting

Lucene / Solr merge

Solr 1.3 released

Solr donated to ASF

The Past

Master – Slave Deployment

Application

Solr Master

Solr Slave Solr Slave Solr Slave Solr Slave

Master as SPOF

Application

Solr Slave Solr Slave Solr Slave Solr Slave

Solr Master

R

Replication Time

Indexing App

Solr Slave

Solr Slave

Solr Master

Solr Slave

Querying App

Solr Slave Solr Slave

Solr Master

Too Much for a Single Shard

Application

Solr MasterSolr Master

Solr Slave Solr SlaveSolr Slave Solr Slave

Solr Slave Solr Slave

Solr Master

Too Much for a Single Shard

Application

Solr Master

Solr Slave Solr SlaveSolr Slave Solr Slave

Solr Master

DocResponseResponse

Shar

d1, s

hard

2,

shar

d3Sh

ard1

, sha

rd2,

sh

ard3

Querying in Multi Master Deployment

Solr SlaveShard 2

Solr SlaveShard 3

Solr SlaveShard 1

Application

SolrCloud Comes Into Play

Basic Glossary

https://cwiki.apache.org/confluence/display/solr/SolrCloud+Glossary

Cluster

Node

Collection

Shard

Leader & Replica

Overseer

Apache ZooKeeperQuorum is required

Sample configuration

clientPort=2181dataDir=/usr/share/zookeeper/datatickTime=2000initLimit=10syncLimit=5server.1=192.168.1.1:2888:3888server.2=192.168.1.2:2888:3888server.3=192.168.1.3:2888:3888

ZooKeeper ZooKeeper ZooKeeper

Solr Instances


Solr Server Solr Server

-DzkHost=192.168.1.2:2181,192.168.1.1:2181,192.168.1.3:2181


-DzkHost=192.168.1.1:2181,192.168.1.2:2181,192.168.1.3:2181

-DzkHost=192.168.1.3:2181,192.168.1.1:2181,192.168.1.2:2181

-DzkHost=192.168.1.3:2181,192.168.1.1:2181,192.168.1.2:2181

Collection Creation



Solr Server Solr Server$ cloud-scripts/zkcli.sh –cmd upconfig -zkhost 192.168.1.2:2181 -confdir /usr/share/config/revolution/conf -conf revolution

$ curl 'http://solr1:8983/solr/admin/collections?action=CREATE&name=revolution&numShards=2&replicationFactor=1'

Solr Server

Single Collection Deployment

Solr Server


Shard1

Application

Shard2

Collection with Replica



Solr Server Solr Server$ curl 'http://solr1:8983/solr/admin/collections?action=CREATE&name=revolution&numShards=2&replicationFactor=2'

Solr Server

Collection with Replicas

Solr Server


Shard1 Replica

Shard2 Replica

Shard2Shard1

Application

Solr Server

Querying

Solr Server

QU

ERY

fl=id,sco

re

fl=id,score

Application

Id,score Id,scoreShard1 Shard2

Solr Server

Solr Server

Querying

Solr Server

Application

docdoc

get docs

get docsResults

Shard2Shard1

Solr Server

Shard and Replica Number

How your data looks

Expected data growth

Target performance

Target node number

Max number of nodes = number of shards * (number of replicas + 1)

Shard

Replica

ReplicaReplica

Replica

Shard

Shard

Replica

What should I go for?

More data? Shard

Replica Replica

ShardShard

ReplicaMore queries ? Replica Replica Replica

Custom Routing

Default (numShards present, pre 4.5)

Implicit (numShards not present, pre 4.5)

Solr ServerSolr Server

id=userB!3id=userA!2

Custom Routing Example

id=userA!1

Shard2Shard1

Querying Solr – Default Routing

Shard 1 Shard 2 Shard 3 Shard 4


Solr Collection

Application



Solr Collection

Application

Quering Solr – Custom Routing

q=revolution&_route_=userA!

Collection Manipulation CommandsCreate

Delete

Reload

Split

Create Alias

Delete Alias

Shard Creation/Deletionhttp://wiki.apache.org/solr/SolrCloud

Collection Creation

name

numShards

replicationFactor

maxShardsPerNode

createNodeSet

collection.configName

Collection Split Example

$ curl 'http://solr1:8983/solr/admin/collections?action=CREATE&name=collection1&numShards=2&replicationFactor=1'

Collection Split Example

$ curl 'http://localhost:8983/solr/admin/collections?action=SPLITSHARD&collection=collection1&shard=shard1'

Collection Aliasing

$ curl 'http://solr1:8983/solr/admin/collections? action=CREATEALIAS&name=weekly&collections=20131107,20131108,20131109,20131110,20131111,20131112,20131113'

$ curl 'http://solr1:8983/solr/admin/collections? action=DELETEALIAS&name=weekly'

$ curl 'http://solr1:8983/solr/weekly/select?q=revolution'

Caches

q=lucene+revolution

fq=city:Dublin

Solr Cache

Refreshed with IndexSearcher

Configurable

Different purposes

Different implementations

Filter Cache

q=*:*&fq={!cache=false}city:Dublin

q=*:*&fq={!frange l=0 u=10 cache=false cost=200}sum(price,pro)

q=lucene+revolution&fq=city:Dublin

<filterCache class="solr.FastLRUCache" size="512" initialSize="512" autowarmCount="128" />

q=lucene+revolution+city:Dublin

Document Cache

<documentCache class="solr.LRUCache" size="512" initialSize="512" />

Query Result Cache

q=lucene+revolution&fq=city:Dublin&sort=date+desc&start=0&rows=10

<queryResultCache class="solr.LRUCache" size="512" initialSize="512" autowarmCount="128"/>

q=lucene+revolution+city:Dublin&sort=date+desc&start=0&rows=10

<queryResultWindowSize>20</queryResultWindowSize>

<queryResultMaxDocsCached>200</queryResultMaxDocsCached>

Warming<listener event="newSearcher" class="solr.QuerySenderListener"> <arr name="queries"> <lst><str name="q">*:*</str><str name="sort">date desc</str></lst> <lst><str name="q">keywords:* OR tags:*</str></lst> <lst><str name="q">*:*</str><str name="fq">active:*</str></lst> </arr></listener><listener event="firstSearcher" class="solr.QuerySenderListener"> <arr name="queries"> <lst><str name="q">*:*</str><str name="sort">date desc</str></lst> <lst><str name="q">keywords:* OR tags:*</str></lst> <lst><str name="q">*:*</str><str name="fq">active:*</str></lst> </arr></listener><useColdSearcher>false</useColdSearcher>

The Right Directory

_0.fdt _0.fdx _0.fnm _0.nvd

_1.fdt _1.fdx _1.fnm _1.nvd

StandardDirectory

SimpleFSDirectory

NIOFSDirectory

MMapDirectory

NRTCachingDirectory

RAMDirectory <directoryFactory name="DirectoryFactory" class="solr.NRTCachingDirectoryFactory" />

Column oriented fields - DocValues

<field name="categories" type="string" indexed="false" stored="false" multiValued="true" docValues="true"/>

<field name="categories" type="string" indexed="false" stored="false" multiValued="true" docValues="true" docValuesFormat="Disk"/>

NRT compatible

Better compression than field cache

Can store data outside of JVM heap

Can improve things for dynamic indices

Segment Merge

a b c d e

Level 0 Level 1

cf g

Segment Merge Under Control

Merge policy

Merge scheduler

Merge factor

Merge policy configuration

Configuring Segment Merge

<mergePolicy class="org.apache.lucene.index.TieredMergePolicy"> <int name="maxMergeAtOnce">10</int> <int name="segmentsPerTier">10</int></mergePolicy>

<mergeScheduler class="org.apache.lucene.index.ConcurrentMergeScheduler"/>

<mergeFactor>10</mergeFactor>

<mergedSegmentWarmer class="org.apache.lucene.index.SimpleMergedSegmentWarmer"/>

Indexing Throughput Tuning

Maximum indexing threads

RAM buffer size

Maximum buffered documents

Bulk, bulks and bulks

CloudSolrServer

Autocommit

Cutting off unnecessary stuff

TransactionLog

<updateLog> <str name="dir">${solr.ulog.dir:}</str></updateLog>

Updates durability

Recovering peer replay

Performant Realtime Get

<requestHandler name="/get" class="solr.RealTimeGetHandler"></requestHandler>

Autocommit or Not?

<autoCommit> <maxTime>15000</maxTime> <maxDocs>1000</maxDocs> <openSearcher>false</openSearcher></autoCommit>

<autoSoftCommit> <maxTime>1000</maxTime> </autoSoftCommit>

Automatic data flush

Automatic index view refresh

Autocommit & openSearcher=true<autoCommit> <maxDocs>10</maxDocs> <openSearcher>true</openSearcher></autoCommit>

AutoSoftCommit & openSearcher=false<autoCommit> <maxDocs>1000</maxDocs> <openSearcher>false</openSearcher></autoCommit>

<autoSoftCommit> <maxDocs>10</maxDocs> </autoSoftCommit>

Postings Formats to the Rescue

Lucene 4.0 >= Flexible Indexing

Postings == docs, positions, payloads

Different postings formats available

<codecFactory class="solr.SchemaCodecFactory" />

<field name="id" type="string_pulsing" indexed="true" stored="true" />

<fieldType name="string_pulsing" class="solr.StrField" postingsFormat="Pulsing41" />

BloomPulsingSimple textDirectMemory

MonitoringCluster state

Nodes utilization

Memory usage

Cache utilization

Query response time

Warmup times

Garbage collector work

JMX and Solr

JMX and Solr

Administration Panel

Administration Panel

Monitoring with SPM

Monitoring with SPM

Other Monitoring Tools

Ganglia http://ganglia.sourceforge.net/

New Relic http://www.newrelic.com/

Opsview http://www.opsview.com

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

http://sematext.com/about/jobs.html

Rafał Kuć @kucrafal [email protected]

Sematext @sematext http://sematext.com http://blog.sematext.com

SPM discount code: LR2013SPM20

Thank You !

@ Sematext booth ;)

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