2013-08-29 01:24:34 +02:00
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[[mapping-source-field]]
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=== `_source`
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The `_source` field is an automatically generated field that stores the
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actual JSON that was used as the indexed document. It is not indexed
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(searchable), just stored. When executing "fetch" requests, like
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<<docs-get,get>> or
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<<search-search,search>>, the `_source` field is
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returned by default.
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2015-04-30 22:58:53 -07:00
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Many APIs may use the `_source` field. For example, the
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<<docs-update,Update API>>. To minimize the storage cost of
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`_source`, set `index.codec: best_compression` in index settings.
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