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**To create a data store** The following ``create-datastore`` example creates a data store, which is a repository for messages. :: aws iotanalytics create-datastore \ --cli-input-json file://create-datastore.json Contents of ``create-datastore.json``:: { "datastoreName": "mydatastore", "retentionPeriod": { "numberOfDays": 90 }, "tags": [ { "key": "Environment", "value": "Production" } ] } Output:: { "datastoreName": "mydatastore", "datastoreArn": "arn:aws:iotanalytics:us-west-2:123456789012:datastore/mydatastore", "retentionPeriod": { "numberOfDays": 90, "unlimited": false } } For more information, see `CreateDatastore <https://docs.aws.amazon.com/iotanalytics/latest/APIReference/API_CreateDatastore.html>`__ in the *AWS IoT Analytics API Reference*.