Scaling search withSolrCloud

Jan HøydahlCominvent AS

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1995: Developer telecom1998: Java developer2000: Search - FAST2006: Lucene2007: new Cominvent()2009: Lucene/Solr2011: Lucene committer2012: Lucene PMC

> 100 projects

Jan Høydahl

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Business critical searchDomain knowledge & best practices:

Consulting Training Support

About Cominvent4

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Calendar from www.calendar-of-2012.com

SEPTEMBER 2012MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY

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SolrTraining.com

Next course in Oslo:

http://www.meetup.com/Oslo-Solr-Community

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CommunityZone talk:«Solr 101»

Thursday 14:20

http://www.meetup.com/Oslo-Solr-Community

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next MeetUp:

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•Sinsheim, Germany•November 5-8

•Lucene/Solr track•www.apachecon.eu

ApacheCon Europe 2012

Agenda

• Intro to Solr•Scaling search - before• Introduction to SolrCloud•Demo with Wikipedia data•Plans for Solr going forward•Q&A

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Intro to Solr

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Apache Solr

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Search Server

Completely HTTP based

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Areas of use

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Example: e-commerce

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www.libris.no

Boosting by function

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Boosting on review popularity and sales numbers:

log(sum(popularity,numsold))

Auto suggest & phonetic normalization17

Example: classifieds/auctions

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www.finn.no

Example: classifieds/auctions

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www.finn.no

Who use Apache Lucene/Solr™ ?

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..and many more:http://wiki.apache.org/solr/PublicServers

Versions

•Current stable = 3.6.1•Latest release = 4.0-beta•Next release = 4.0-FINAL --- «soon» :-)

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01/2007

v1.1

09/2008

v1.3

11/2009

v1.4

03/2011

v3.1

04/2012

v3.6

06/2012

v4.0a

08/2012

v4.0ß

??/2012

v4.0

06/2011

v3.3

07/2012

v3.6.1

Scaling search

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Why scale?

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•One single Solr server handles...–millions of documents (per shard)–hundreds of queries per second (per replica)

•We need to scale if...–data volume increases–query volume increases–we need high availability / fault tolerance

Scaling search - before

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Solr shard 1

- config, schema- synonyms

Scaling search - before

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Solr shard 1

- config, schema- synonyms

Solr shard 2

- config, schema- synonyms

- Add shard node- Manually copy config- Manually index to right shard- Manually shards query parameter

Scaling search - before

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Solr shard 1

- config, schema- synonyms

Solr 1 replica

- config, schema- synonyms

Solr shard 2

- config, schema- synonyms

Solr 2 replica

- config, schema- synonyms - Add replica node

- Copy config- Setup poll based replication- No indexing failover- Monitor every node

- Add shard node- Manually copy config- Manually index to right shard- Manually shards query parameter

Solr Cloud

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What is SolrCloud?

•New in Solr 4.0•Easier scaling•Centralized config•Fault tolerant indexing and querying•Using Apache ZooKeeper as «registry»

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ZooKeeper: «Because coordinating distributed systems is a Zoo»

What is SolrCloud

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What is SolrCloud

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What is SolrCloud

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What is SolrCloud

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Logical collection

What is SolrCloud

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Logical collection

Transaction log

Soft commit

Scaling search - with SolrCloud

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Solr master 1

ZK awareApache

ZooKeeper

Scaling search - with SolrCloud

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Solr master 1

ZK aware

Solr master 2

ZK awareApache

ZooKeeper

- Add shard node, point it to ZK- It assumes the role of shard 2- Automatic document distribution- Automatic querying across cluster- Centralized config & monitoring

Scaling search - with SolrCloud

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

Apache ZooKeeper

- Add shard node, point it to ZK- It assumes the role of shard 2- Automatic document distribution- Automatic querying across cluster- Centralized config & monitoring

- Add replica node(s)- Auto role assignment- Push based replication- Indexing failover- Leader election through ZK

Scaling search - with SolrCloud

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

Apache ZooKeeper

Scaling search - with SolrCloud

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

Apache ZooKeeper

Solr master 2

ZK aware

Scaling search - with SolrCloud

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

Apache ZooKeeper

Solr master 2

ZK aware

Solr replica 2

ZK aware

Configuration

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

ZK

Configuration

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

ZK

-DzkRun-Dcollection.configName=jz-DnumShards=2-Dbootstrap_confdir=./solr/coll/conf

Configuration

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Solr master 1

ZK aware

Solr replica 1

ZK aware

Solr master 2

ZK aware

Solr replica 2

ZK aware

ZK

-DzkHost=localhost:xxxx

-DzkRun-Dcollection.configName=jz-DnumShards=2-Dbootstrap_confdir=./solr/coll/conf

-DzkHost=localhost:xxxx-DzkHost=localhost:xxxx

Demoindexing & querying

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Solr 4.0 and beyond

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•Other news in v4.0 FINAL (expected later this autumn)–NRT–Real-time GET–Smaller index & memory footprint–New «modern» Admin GUI–Incremental updates–Pseudo-join

•Future plans–More shard distribution mechanisms–Re-balancing cluster (split shards)–...

Recap

•Apache Solr open source enterprise search•Scaling Solr was hard•Solr 4.0 with SolrCloud makes it easy :)

–Centralized config–Effortless scaling of cluster–Fault tolerant indexing & querying

•Download the 4.0-beta today, 4.0-FINAL soon

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Remember

Calendar from www.calendar-of-2012.com

SEPTEMBER 2012MONDAY TUESDAY WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY

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Next Solr course in Oslo:

CommunityZone talk:«Solr 101»

Thursday 14:20

www.solrkurs.no

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Jan HøydahlCominvent AS@cominvent

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