Azure Data Manager for Energy uses Azure Storage, Azure Cosmos DB and Elasticsearch index as underlying data stores for persisting your data partition data. These data stores offer high durability, availability, and scalability. Azure Data Manager for Energy uses [geo-zone-redundant storage](../storage/common/storage-redundancy.md#geo-zone-redundant-storage) or GZRS to automatically replicate data to a secondary region that's hundreds of miles away from the primary region. The same security features enabled in the primary region (for example, encryption at rest using your encryption key) to protect your data are applicable to the secondary region. Similarly, Azure Cosmos DB is a globally distributed data service, which replicates the metadata (catalog) across regions. Elasticsearch index snapshots are taken at regular intervals and geo-replicated to the secondary region. All inflight data are ephemeral and therefore subject to loss. For example, in-transit data that is part of an on-going ingestion job that isn't persisted yet is lost, and you must restart the ingestion process upon recovery.
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