Does any one know what the RTO and RPO are when using ZRS (Zone-redundant storage) storage account on Azure? Thanks

Hi Thomas, For ZRS storage account RTO/RPO aren't really applicable since the account and its data will still be available even if one availability zone fails. Applications that will use the storage account should be designed with retry logic to allow for brief outage while DNS records are repointed during AZ failure. Zone-redundant storage https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy#zone-redundant-storage Please click Accept Answer and upvote if the above was helpful. Thanks. -TP

RTO and RPO on ZRS storage accounts

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TP 99,056 Reputation points

2024-11-18T20:57:35.14+00:00

Hi Thomas,

For ZRS storage account RTO/RPO aren't really applicable since the account and its data will still be available even if one availability zone fails. Applications that will use the storage account should be designed with retry logic to allow for brief outage while DNS records are repointed during AZ failure.

Zone-redundant storage

https://learn.microsoft.com/en-us/azure/storage/common/storage-redundancy#zone-redundant-storage

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP
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Thomas Ryszkiewicz 0 Reputation points

2024-11-18T23:25:02.9266667+00:00

Thanks for the reply, your answer and the link provided clarified it completely!
I was looking for a strict RPO value so I missed the fact that writing data to the zones is synchronous, and requires all 3 zones to report success before it's considered written, essentially making RPO 0 minutes.
It looks like I can consider RTO pretty minimal as well, since the recovery time depends on how long it'll take for the networking updates such as Domain Name System (DNS) repointing.
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RTO and RPO on ZRS storage accounts

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