Introduction To ElasticSearch

Hasan Rahhal gives a good introduction to ElasticSearch:

On the top level hits.total is the total number of the docs using an empty search query, and max_score is the maximum score a document can take in a specific query. In our case it’s one, since no query was specified.

In __shards.total_ the value is the number of Lucene indexes that Elasticsearch created for that index. The default number is always 5 unless we specify otherwise on index creation time. More details about shards are explained here.

ElasticSearch is designed to store things like logs and monitoring metrics, and the interface is JSON.  This makes it very useful for certain tasks and infuriatingly difficult to do other things (like advanced aggregations).  Still, in a medium-sized or larger environment, this is probably a technology you either are using today or want to use.

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Querying Elasticsearch

Swatee Chand has a tutorial on querying Elasticsearch: In Elasticsearch, aggregations framework is responsible for providing the aggregated data based on a search query. Aggregations can be composed together in order to build complex summaries of the data. For a better understanding, consider it as a unit-of-work. It develops analytic information over a set of documents that are available […]

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Basics Of Elasticsearch In .NET

Ivan Cesar gives us a brief tutorial of the Elasticsearch .NET API: To be able to search something, we must store some data into ES. The term used is “indexing.” The term “mapping” is used for mapping our data in the database to objects which will be serialized and stored in Elasticsearch. We will be […]

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