Hybrid Cloud Storage Array (HCSA) integrates on-premises storage with Alibaba Cloud Object Storage Service (OSS) to provide a variety of cloud features.
HCSA allows you to scale on-premises storage by using cloud storage space in cloud cache, cloud replication, and cloud tiering modes.
|Item||Cloud tiering||Cloud cache||Cloud replication|
|Data saving location if the array fails||The cold data is saved on the cloud.||All data is saved on the cloud.||All data is saved on the cloud.|
|Array access if the network fails||The array cannot be accessed.||Only the hot data that is stored in the on-premises storage of the array can be accessed.||All data can be accessed in the array.|
|Data access performance||Hot data: fast. Cold data: slow.||Hot data: fast. Cold data: slow.||All Data: fast.|
|Data recovery from the cloud||Not supported||Recovery to the latest backup in the cloud||Recovery to the latest backup in the cloud|
The automatic cloud backup mode simplifies data management and maintenance. In this mode, you can create snapshots at different points in time in the on-premises storage of your array. Then, you can upload the snapshots to the specified OSS bucket on Alibaba Cloud to back up data.
The file-level cloud replication mode balances the array performance and data protection. In this mode, data is bidirectionally mirrored between folders in the on-premises storage and folders in the cloud.
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