Hi Team, I'm looking for pre-requisite for enabling Zone to Zone disaster recovery within the region. Should I create Recovery service with zone Redudant or something else. If I'm going with LRS option will ASR within region between zone will support or not.

Are you referring to backup storage redundancy? If so, that's either Locally or Geo-redundant. In this case, it seems that Locally-redundant might suffice. Note that's separate from the ability to support zone-redundant failover and the resiliency of the vault against an individual datacenter failures. Zone-redundancy is built-in (as long as the region supports it). As per https://learn.microsoft.com/en-us/azure/reliability/reliability-backup "Azure Backup is a zone-redundant service for both Recovery Service and Backup vaults. When you create your vault resources, you don't need to configure for zone-redundancy. In the case of a zonal outage, the vaults remain operational." hth Marcin

What is redundancy features in Recovery Service vault

Accepted answer

Marcin Policht 10,675 Reputation points MVP

2024-03-20T23:27:21.81+00:00

Are you referring to backup storage redundancy? If so, that's either Locally or Geo-redundant. In this case, it seems that Locally-redundant might suffice.

Note that's separate from the ability to support zone-redundant failover and the resiliency of the vault against an individual datacenter failures. Zone-redundancy is built-in (as long as the region supports it).

As per https://learn.microsoft.com/en-us/azure/reliability/reliability-backup

"Azure Backup is a zone-redundant service for both Recovery Service and Backup vaults. When you create your vault resources, you don't need to configure for zone-redundancy. In the case of a zonal outage, the vaults remain operational."

hth

Marcin
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Mahavir Saroj 201 Reputation points

2024-03-21T06:32:54.2033333+00:00

I'm looking for Zone to Zone disaster recovery pre-requisite. Which type of tier will support to this feature in recovery service vault? LRS, GRS or Zone redudant

SadiqhAhmed-MSFT 37,686 Reputation points Microsoft Employee

2024-03-21T07:26:52.2066667+00:00

@Mahavir Saroj To support zone-to-zone disaster recovery, you need to use a storage redundancy option that provides redundancy across multiple availability zones within a region. In Azure, this is provided by the Zone-redundant storage (ZRS) option.

ZRS provides synchronous replication of data across three availability zones within a region, which ensures that your data is highly available and resilient to zone-level failures. This makes it an ideal choice for applications that require high availability and disaster recovery capabilities.

When you create a Recovery Services vault in Azure, you can choose the storage replication option for the vault. If you want to support zone-to-zone disaster recovery, you should choose the ZRS option. This will ensure that the backup data is stored in a highly available and resilient manner across multiple availability zones within the region.

Please note that ZRS is only available in certain regions in Azure. You can check the availability of ZRS in your region by referring to the Azure documentation - https://learn.microsoft.com/en-us/azure/backup/backup-overview#why-use-azure-backup

Hope this helps!

Marcin Policht 10,675 Reputation points MVP

2024-03-21T11:34:53.5166667+00:00

If you're referring to the backup storage redundancy, then either LRS or GRS should work. Which one you choose depends mainly on your data residency requirements and the need to be able to restore the systems in case of a region-wide (rather than zone-wide only) disaster.

As I already mentioned, "Azure Backup is a zone-redundant service for both Recovery Service and Backup vaults. When you create your vault resources, you don't need to configure for zone-redundancy. In the case of a zonal outage, the vaults remain operational."

hth

Marcin

Mahavir Saroj 201 Reputation points

2024-03-21T15:35:01.0633333+00:00

@SadiqhAhmed-MSFT Today I did lab of Zone to Zone Disaster recovery of Azure VM.

I created Recovery server vault using LRS redundancy option and enabled Zone-zone replication, Once replication done I initiated failover and failover went successful. I didn't face any issue.

I'm wondering how Zone to Zone disaster supporting with LRS redundancy. I have attached a snapshot of outcome results.

What is exact use of storage replication type in Recovery Service Vault.

SadiqhAhmed-MSFT 37,686 Reputation points Microsoft Employee

2024-03-21T17:58:58.1466667+00:00

@Mahavir Saroj It's great to hear that your failover went successfully.

Regarding your question about how zone-to-zone disaster is supported with LRS redundancy, it's important to note that LRS provides data redundancy within a single data center. This means that if a disaster occurs within the same data center, LRS redundancy may not be sufficient to protect your data. However, if you have enabled zone-to-zone replication, your data will be replicated to another zone within the same region, providing additional protection against disasters that may affect a single zone.

Regarding your question about the use of storage replication type in Recovery Service Vault, the storage replication type determines how your data is replicated and stored in the Recovery Services vault. There are three types of replication available: locally redundant storage (LRS), geo-redundant storage (GRS), and zone-redundant storage (ZRS).

LRS replicates your data three times within a single data center, providing protection against local hardware failures. GRS replicates your data to a secondary region, providing protection against regional disasters. ZRS replicates your data across availability zones within the same region, providing protection against zone-level disasters.

When you create a Recovery Services vault, you can choose the storage replication type that best meets your needs based on your recovery objectives and budget.

Mahavir Saroj 201 Reputation points

2024-03-26T16:47:47.0333333+00:00

Thanks for sharing the detail information.

SadiqhAhmed-MSFT 37,686 Reputation points Microsoft Employee

2024-03-28T14:51:34.5233333+00:00

@Mahavir Saroj Glad to help! :)
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What is redundancy features in Recovery Service vault

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