Problems of default Solr installation?

Single instance

• If Solr instance down - Downtime !
• If server of Solr down - Downtime !
• If you apply new config - Downtime !

Why do we need ElasticSearch?

We want 24/7 Uptime

• One node down : no impact
• Roll-restart : node-by-node
• Change configuration on the fly
• Scalable easily : if we have new server, just make them join the cluster

Disadvantages and Opportunities

Some disadvantages of ElasticSearch

• We can't repair misspelling in 1st character
• Currently our fire-monitoring is quite poor

Opportunities given by ElasticSearch

• Separated configuration for each language - Separated indexes
• Phonetic - cellphone=cellfone (only after separate languages)
• Better managing results (mixing boosting and score)
• Better support of plural forms (light_english, possessive_english stemmers)

Opportunities given by ElasticSearch

• Search statistics dashboard (current tools are poor)
• Business metrics usage (revenue, CR, margin)
• A/B testing

Opportunities given by ElasticSearch

• Brand, category, supplier, vendor - matching with misspelling (fuzziness phrase matching)
• "More like this" Feature (just basic support)

Some problems of ElasticSearch

• Brand, category, supplier, vendor - matching with misspelling (fuzziness phrase matching)
• "More like this" Feature (just basic support)

Let's talk about it...

Author - Alex Sharov, Medhi Bechina