12/14/2023 0 Comments Let me backup meaningThinking at a higher level than the individual blobs, any backup solution for Azure Blob Storage would need to protect against any deletion, accidental or otherwise, of a container, or an entire storage account. The bottom line: replication is not a real backup! On this basis alone GRS, and any other replication level provided by Azure Blob Storage, all fail to meet the most basic requirement of a backup. If the accidental or malicious deletion of an object happens, GRS provides absolutely no recovery option, since all changes (and, in this case, deletion counts as a change) are replicated to all copies, including those in the secondary region. Think about it: With GRS, you get no such capability, since any modifications or deletions are immediately replicated to the secondary region. One of the critical components of a backup is that even if, and especially when, a blob is changed or deleted, the blob is still recoverable, as it existed at a desired previous point in time. Problem 1: Synchronized modification and deletion of blobs Synchronized modification and deletion of blobs.There are several key attributes of backup which are entirely missing in the replication models provided in Azure (and other clouds) this post will discuss those in detail, and then offer a simple solution for Azure Blob Storage backup. Replication levels are provided only as a way of increasing resiliency of the solution and availability of data.Īzure Blob Storage Replication vs. None of the Azure Blob Storage replication levels, Read Access Geo-Redundant Storage (RA-GRS) included, give you backup. To be blunt, that’s an extremely dangerous misconception. The belief is that by selecting Geo-Redundant Storage (GRS) as the replication level, one will achieve a geographically-segregated backup copy of the data. There’s a widespread impression held by many IT pros today about the Azure Blob Storage redundancy levels, and how merely selecting the correct redundancy level provides a backup of data stored in Azure Blob Storage.
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