Completed
SCHEMA-LESS? I've said Elasticsearch is schema-less. Yes, the schema is not enforced by the database, but you can define a mapping, a definition on the type of the data integer, String. Dates. Dateti…
Class Central Classrooms beta
YouTube videos curated by Class Central.
Classroom Contents
Python and Elasticsearch 101
Automatically move to the next video in the Classroom when playback concludes
- 1 Intro
- 2 WHAT IS ELASTICSEARCH You know, for search
- 3 WHY DO WE USE ELASTICSEARCH • To store the full telemetry of all our MDM devices Position, actual speed, batteries metrics, alarms, temperature . To store business events to let operational know what…
- 4 SCHEMA-LESS? I've said Elasticsearch is schema-less. Yes, the schema is not enforced by the database, but you can define a mapping, a definition on the type of the data integer, String. Dates. Dateti…
- 5 DOCUMENT AND MAPPING I clearly enjoin you to prepare your index and create and manage the mapping yourself
- 6 Elasticsearch stores data in Shard. Basically you have 5 shards per Nodes. Under the hood, Es will duplicate shards to one or multiple nodes. Also, Shards will balance shards on nodes to spread the s…
- 7 INSERTING DATA . Using a river. A river is a kind of link between Elasticsearch and a service, for instance RabbitMQ, or Twitter . Using the index API. The Index API is globally a POST onto an index,…
- 8 Queries will be more complicated than just an exact match on a field to a value Query and Filter are the same, but query specify how well the results is good with a ranking
- 9 Faceting can be imagined as a Group By with a count. It's extensively used in online store, when you fiter products by colors, brands, sizes... The page displays a counter of available products. The …
- 10 Elasticsearch use Lucene to extract information using tokenizers, and analize the text to store it correctly. Thus, ES is able to search if a document match other documents, and return results with r…
- 11 ADMINISTRATIVE TASKS If your mapping changes, the data won't be updated, and you need to reindex all your data. Es provides an API to reindex your actual data to a new one: elasticsearch.helpers.rein…
- 12 Elasticsearch comes with a lots of plugins you should use (HEAD). Rivers are also plugins (RabbitMQ River, Twitter River, Kafka river) There is a python script plugin to do python in your queries Ela…
