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Merge pull request #87602 from rachel-msft/edits905b
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articles/mariadb/concepts-read-replicas.md

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ms.date: 09/06/2019
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# Read replicas in Azure Database for MariaDB
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## Cross-region replication
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You can create a read replica in a different region from your master server. Cross-region replication can be helpful for scenarios like disaster recovery planning or bringing data closer to your users.
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You can have a master server in any [Azure Database for MariaDB region](https://azure.microsoft.com/global-infrastructure/services/?products=mariadb). A master server can have a replica in its paired region or the universal replica regions.
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You can have a master server in any [Azure Database for MariaDB region](https://azure.microsoft.com/global-infrastructure/services/?products=mariadb). A master server can have a replica in its paired region or the universal replica regions. The picture below shows which replica regions are available depending on your master region.
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[ ![Read replica regions](media/concepts-read-replica/read-replica-regions.png)](media/concepts-read-replica/read-replica-regions.png#lightbox)
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### Universal replica regions
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You can always create a read replica in any of the following regions, regardless of where your master server is located. These are the universal replica regions:
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articles/mysql/concepts-read-replicas.md

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# Read replicas in Azure Database for MySQL
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## Cross-region replication
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You can create a read replica in a different region from your master server. Cross-region replication can be helpful for scenarios like disaster recovery planning or bringing data closer to your users.
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You can have a master server in any [Azure Database for MySQL region](https://azure.microsoft.com/global-infrastructure/services/?products=mysql). A master server can have a replica in its paired region or the universal replica regions.
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You can have a master server in any [Azure Database for MySQL region](https://azure.microsoft.com/global-infrastructure/services/?products=mysql). A master server can have a replica in its paired region or the universal replica regions. The picture below shows which replica regions are available depending on your master region.
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[ ![Read replica regions](media/concepts-read-replica/read-replica-regions.png)](media/concepts-read-replica/read-replica-regions.png#lightbox)
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### Universal replica regions
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You can always create a read replica in any of the following regions, regardless of where your master server is located. These are the universal replica regions:
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articles/postgresql/concepts-read-replicas.md

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# Read replicas in Azure Database for PostgreSQL - Single Server
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## Cross-region replication
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You can create a read replica in a different region from your master server. Cross-region replication can be helpful for scenarios like disaster recovery planning or bringing data closer to your users.
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You can have a master server in any [Azure Database for PostgreSQL region](https://azure.microsoft.com/global-infrastructure/services/?products=postgresql). A master server can have a replica in its paired region or the universal replica regions. The picture below shows which replica regions are available depending on your master region.
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You can have a master server in any [Azure Database for PostgreSQL region](https://azure.microsoft.com/global-infrastructure/services/?products=postgresql). A master server can have a replica in its paired region or the universal replica regions.
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[ ![Read replica regions](media/concepts-read-replica/read-replica-regions.png)](media/concepts-read-replica/read-replica-regions.png#lightbox)
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### Universal replica regions
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You can always create a read replica in any of the following regions, regardless of where your master server is located. These are the universal replica regions:
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If you are using cross-region replicas for disaster recovery planning, we recommend you create the replica in the paired region instead of one of the other regions. Paired regions avoid simultaneous updates and prioritize physical isolation and data residency.
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However, there are limitations to consider:
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There are limitations to consider:
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* Regional availability: Azure Database for PostgreSQL is available in West US 2, France Central, UAE North, and Germany Central. However, their paired regions are not available.
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* Uni-directional pairs: Some Azure regions are paired in one direction only. These regions include West India, Brazil South, and US Gov Virginia.
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* Uni-directional pairs: Some Azure regions are paired in one direction only. These regions include West India, Brazil South.
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This means that a master server in West India can create a replica in South India. However, a master server in South India cannot create a replica in West India. This is because West India's secondary region is South India, but South India's secondary region is not West India.
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