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Reindex Elasticsearch Documents
Whether you need to change the mapping of an existing index or take a subset of data from one index and copy it to another, the `_reindex` API in Elasticsearch has you covered. With the `_reindex` API, you can take all or just a subset of data from one index and copy it to another. In this hands-on lab, you are given the opportunity to exercise the following: * Reindex a subset of data from one index to a new index * Create an ingest node pipeline * Transform data during the reindexing process

Lab Info
Table of Contents
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Challenge
Create the romeo_and_juliet index.
Use the Kibana console tool to execute the following:
PUT romeo_and_juliet { "mappings": { "properties": { "line_id": { "type": "integer" }, "line_number": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, "play_name": { "type": "keyword" }, "speaker": { "type": "keyword" }, "speech_number": { "type": "integer" }, "text_entry": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } }, "type": { "type": "text", "fields": { "keyword": { "type": "keyword", "ignore_above": 256 } } } } }, "settings": { "number_of_shards": 4, "number_of_replicas": 3 } }
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Challenge
Create the shakespeare-tokenizer ingest node pipeline.
Use the Kibana console tool to execute the following:
PUT _ingest/pipeline/shakespeare-tokenizer { "description": "Tokenizes the text_entry field into an array. Adds a word_count field. Removes the play_name field.", "processors": [ { "split": { "field": "text_entry", "separator": "\\s+", "target_field": "word_array" } }, { "script": { "lang": "painless", "source": "ctx.word_count = ctx.word_array.length" } }, { "remove": { "field": "play_name" } } ] }
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Challenge
Reindex the play "Romeo and Juliet".
Use the Kibana console tool to execute the following:
POST _reindex { "source": { "index": "shakespeare", "query": { "match": { "play_name": "Romeo and Juliet" } } }, "dest": { "index": "romeo_and_juliet", "pipeline": "shakespeare-tokenizer" } }
About the author
Real skill practice before real-world application
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
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On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.