Elastic Search is Distributed Store for documents in json format which is horizontally scalable & it is effecient in searching text
Shards and Replicas
In Elastic Search, When we insert documents an Inverted Index is built Refer Here
From the above concepts:
How Elastic search works even when server(s) in cluster is down?
Shards and Replicas
Why Elastic Serarch is good at searching text?
Inverted Index
Exercise:
Try Building inverted index for the following data
Until one has loved an animal, a part of ones soul remains unawakened. –Anatole France
Animals are such agreeable friends—they ask no questions; they pass no criticisms. –George Eliot
An animals eyes have the power to speak a great language.–Martin Buber
The better I get to know men, the more I find myself loving dogs. –Charles de Gaulle
Dogs are our link to paradise. They don't know evil or jealousy or discontent. –Milan Kundera
What would be the ideal number of shards and replicas when i have 5 servers and assume the cluster to work even if two nodes are down
