In this section, we will configure ElasticSearch and integrate it with Couchbase.
The Couchbase and ES integration architecture (Courtesy - Couchbase Documentation)
Let me briefly explain the architecture and usage pattern of ElasticSearch with the Couchbase cluster. Couchbase can replicate documents to ElasticSearch using XDCR, which will be discussed in detail in the next chapter. ElasticSearch will perform indexing on documents replicated from the Couchbase cluster by each attribute, and the developer will execute the search query in ES and use the resultset returned by ES to get the actual document from the Couchbase cluster, as shown in the preceding diagram. Why are we not storing the actual document in ES and fetching it from ES itself? In order to answer this query, you need to remember that ES is good for searching text and Couchbase is fast at data retrieval, since all documents are, by default, stored in the memory. Here, we are trying to use the best features...
