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Oct 9, 2025
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Removing the TL;DR section #3429

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Removing the TL;DR section
yetanothertw Oct 9, 2025
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Merge branch 'main' into rm-tldr
yetanothertw Oct 9, 2025
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2 changes: 0 additions & 2 deletions ...ata-stream/tutorial-migrate-ilm-managed-data-stream-to-data-stream-lifecycle.md
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Expand Up @@ -13,8 +13,6 @@ products:
In this tutorial we’ll look at migrating an existing data stream from [Index Lifecycle Management ({{ilm-init}})](../index-lifecycle-management.md) to [data stream lifecycle](../data-stream.md). The existing {{ilm-init}} managed backing indices will continue to be managed by {{ilm-init}} until they age out and get deleted by {{ilm-init}}; however, the new backing indices will be managed by data stream lifecycle. This way, a data stream is gradually migrated away from being managed by {{ilm-init}} to being managed by data stream lifecycle. As we’ll see, {{ilm-init}} and data stream lifecycle can co-manage a data stream; however, an index can only be managed by one system at a time.


## TL;DR [migrate-dsl-ilm-tldr]

To migrate a data stream from {{ilm-init}} to data stream lifecycle we’ll have to execute two steps:

1. Update the index template that’s backing the data stream to set [prefer_ilm](elasticsearch://reference/elasticsearch/configuration-reference/data-stream-lifecycle-settings.md#index-lifecycle-prefer-ilm) to `false`, and to configure data stream lifecycle.
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