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Merge pull request #224928 from flang-msft/fxl---Update-cache-how-to-zone-redundancy-2
Fxl---update cache how to zone redundancy 2
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articles/azure-cache-for-redis/cache-how-to-premium-persistence.md

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ms.author: franlanglois
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ms.service: cache
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ms.topic: conceptual
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ms.date: 09/19/2022
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ms.date: 01/23/2023
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# Configure data persistence for a Premium Azure Cache for Redis instance
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- [What is a rewrite and how does it affect my cache?](#what-is-a-rewrite-and-how-does-it-affect-my-cache)
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- [What should I expect when scaling a cache with AOF enabled?](#what-should-i-expect-when-scaling-a-cache-with-aof-enabled)
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- [How is my AOF data organized in storage?](#how-is-my-aof-data-organized-in-storage)
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- [Can I have AOF persistence enabled if I have more than one replica?](#can-i-have-aof-persistence-enabled-if-i-have-more-than-one-replica)
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### Can I enable persistence on a previously created cache?
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### Can I have AOF persistence enabled if I have more than one replica?
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No, AOF persistence cannot be enabled with replicas (i.e replica count >= 2).
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No, you can't use Append-only File (AOF) persistence with multiple replicas (more than one replica).
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## Next steps
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Learn more about Azure Cache for Redis features.
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- [Azure Cache for Redis Premium service tiers](cache-overview.md#service-tiers)
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- [Add replicas to Azure Cache for Redis](cache-how-to-multi-replicas.md)

articles/azure-cache-for-redis/cache-how-to-zone-redundancy.md

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1. Configure your settings for clustering and/or RDB persistence.
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> [!NOTE]
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> Zone redundancy doesn't support AOF persistence with 2 or more replicas or work with geo-replication currently.
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>
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> [!NOTE]
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> Zone redundancy doesn't support Append-only File (AOF) persistence with multiple replicas (more than one replica).
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> Zone redundancy doesn't work with geo-replication currently.
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>
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1. Select **Create**.
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### Can I update my existing Premium cache to use zone redundancy?
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No, this isn't supported currently.
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No, updating an existing Premium cache to use zone redundancy isn't supported currently.
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### How much does it cost to replicate my data across Azure Availability Zones?
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When using zone redundancy configured with multiple Availability Zones, data is replicated from the primary cache node in one zone to the other node(s) in another zone(s). The data transfer charge is the network egress cost of data moving across the selected Availability Zones. For more information, see [Bandwidth Pricing Details](https://azure.microsoft.com/pricing/details/bandwidth/).
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When your cache uses zone redundancy configured with multiple Availability Zones, data is replicated from the primary cache node in one zone to the other node(s) in another zone(s). The data transfer charge is the network egress cost of data moving across the selected Availability Zones. For more information, see [Bandwidth Pricing Details](https://azure.microsoft.com/pricing/details/bandwidth/).
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## Next Steps
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