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I've read the re-indexing documents which is required if anything has been changed in the existing index then I've to re-index documents. For example. If I make a change in the existing field then I've to reindex all the documents.

Should I re-index documents if I make a change in settings of an existing index?

What if I want to add a new analyzer/filter in the settings? Does it require to re-index documents?

Nikolay Vasiliev
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Devang Prajapati
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  • "Should i reindex documents in elasticsearch whem i update settings of index" - Yes , if you won't do that you will get different results. https://stackoverflow.com/questions/58896418/elasticsearch-indicesclient-put-settings-not-working/58898505#58898505 – Assael Azran Nov 20 '19 at 10:04

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not necessarily, for example, changing shard number definitely requires a reindex, b/c ES needs to reshard all document. changing replicas doesn't need reindex, and in fact a common practice to speed up your index with replica = 0, then later turns it = 1.

fast tooth
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