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docs: mention acid-compliance for meta store #16014

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2 changes: 1 addition & 1 deletion docs/design/metadata-storage.md
Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,7 @@ See [Metadata storage configuration](../configuration/index.md#metadata-storage)

## Available metadata stores

Druid supports Derby, MySQL, and PostgreSQL for storing metadata.
Druid supports Derby, MySQL, and PostgreSQL for storing metadata. Note that your metadata store must be ACID-compliant. If it isn't ACID-compliant, you can encounter issues, such as tasks failing sporadically.

To avoid issues with upgrades that require schema changes to a large metadata table, consider a metadata store version that supports instant ADD COLUMN semantics.
See the database-specific docs for guidance on versions.
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