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In my last post, Configuring Veeam Backup & Replication SOBR for Non-immutable Object Storage, I covered the basics of how to consume object storage in Veeam Backup & Replication (VBR). In general this is done through the concept of Scale-out Backup Repositories (SOBR). In this post we are going to build upon that land layer in object storage’s object-lock features which is commonly referred to in Veeam speak as Immutability.
First, let’s define immutability. What the backup/disaster recovery world thinks of as immutability is much like the old Write Once, Read Many (WORM) technology of the early 00’s, you can write to it but until it ages out it cannot be deleted or modified in any way. Veeam and other backup vendors definitely treat it this way but object-lock under the covers actually leverages the idea of versioning to make this happen. I can still delete an object through another client but the net effect is that a new version of that object is created with a delete marker attached to it. This means that if that were to occur you could simply restore to the previous version and it’s like it never happened.
With VBR once Immutability is
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