Alibaba Cloud Elasticsearch allows you to create automatic and manual snapshots, restore data from snapshots, and configure shared Object Storage Service (OSS) repositories to ensure the reliability of your Elasticsearch cluster. This topic describes the use scenarios and limits of the preceding features. This topic also describes version compatibility of data restoration from snapshots.
Features
Feature | Use scenario | Limit |
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Create automatic snapshots and restore data from automatic snapshots | You want the system to automatically back up data on a regular basis. |
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Create manual snapshots and restore data from manual snapshots |
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Enable automatic creation of snapshots and store the snapshots to an OSS repository | You want the system to automatically create snapshots for a cluster and store the snapshots in a shared OSS repository. | You must activate OSS and create a bucket in the same region as the cluster. |
Configure a shared OSS repository | You want to restore data from the automatic snapshots of a cluster to another cluster. |
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Version compatibility of data restoration from snapshots
Before you restore data from a snapshot to an Elasticsearch cluster, you must make sure that the version of the cluster in which the snapshot is created is compatible with the version of the destination cluster. You must also make sure that the version of the cluster in which the index to be restored is created is compatible with the version of the destination cluster.
Snapshot-related version compatibility
Version of the cluster in which a snapshot is created | Destination V6.8 cluster | Destination cluster of a version ranging from V7.0 to V7.1 | Destination cluster of a version ranging from V7.2 to V7.16 |
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V5.0 to V5.6 | Supported | Not supported | Not supported |
V6.0 to V6.7 | Supported | Supported | Supported |
V6.8 | Supported | Not supported | Supported |
V7.0 to V7.1 | Not supported | Supported | Supported |
V7.2 to V7.16 | Not supported | Not supported | Supported |
You cannot restore data from snapshots created in a cluster of a later version to a cluster of an earlier version. For example, you cannot restore data from snapshots created in a V7.6.0 cluster to a V7.5.0 cluster.
Index-related version compatibility
Version of the cluster in which the index is created | Destination V6.8 cluster | Destination cluster of a version ranging from V7.0 to V7.1 | Destination cluster of a version ranging from V7.2 to V7.16 |
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V5.0 to V5.6 | Supported | Not supported | Not supported |
V6.0 to V6.7 | Supported | Supported | Supported |
V6.8 | Supported | Not supported | Supported |
V7.0 to V7.1 | Not supported | Supported | Supported |
V7.2 to V7.16 | Not supported | Not supported | Supported |
You cannot restore an index created in a cluster of a later version to a cluster of an earlier version. For example, you cannot restore an index created in a V7.6.0 cluster to a V7.5.0 cluster.
For more information about version compatibility of data restoration from snapshots, see Snapshot compatibility.