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**To update a data store** The following ``update-datastore`` example modifies the settings of the specified data store. :: aws iotanalytics update-datastore \ --cli-input-json file://update-datastore.json Contents of update-datastore.json:: { "datastoreName": "mydatastore", "retentionPeriod": { "numberOfDays": 93 } } This command produces no output. For more information, see `UpdateDatastore <https://docs.aws.amazon.com/iotanalytics/latest/APIReference/API_UpdateDatastore.html>`__ in the *AWS IoT Analytics API Reference*.