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# Cross-regional async replication | ||
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Cross-regional (or multi-server) asynchronous replication focuses on disaster recovery by distributing data across different servers. | ||
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## Prerequisites | ||
* Juju `v.3.4.2+` | ||
* Make sure your machine(s) fulfill the [system requirements](/t/11744) | ||
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### Substrate dependencies | ||
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The following table shows the source and target controller/model combinations that are currently supported: | ||
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| | AWS | GCP | Azure | | ||
|---|---|:---:|:---:| | ||
| AWS | | | | | ||
| GCP | | ![ check ] | ![ check ] | | ||
| Azure | | ![ check ] | ![ check ] | | ||
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## How-to guides | ||
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* [How to set up clusters for cross-regional async replication](/t/13895) | ||
* [How to integrate with a client application](/t/13896) | ||
* [How to remove or recover a cluster](/t/13897) | ||
* [Switchover](/t/13897#switchover) | ||
* [Detach](/t/13897#detach-a-cluster) | ||
* [Recover](/t/13897#recover-a-cluster) | ||
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<!-- BADGES --> | ||
[check]: https://img.shields.io/badge/%E2%9C%93-brightgreen | ||
[cross]: https://img.shields.io/badge/x-white |
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