Save backup storage using Veeam Backup & Replication BitLooker
When you need to back up large amounts of data, you want to use up as little disk space as possible in order to minimize backup storage costs. However, with host-based image-level backups, traditional technologies force you to back up the entire virtual machine (VM) image, which presents multiple challenges that were never problems for classic agent-based backups.
For example, during backup analysis using Veeam ONE, you might notice that some VM backups are larger than the actual disk space usage in guest OS, resulting in higher-than-planned backup repository consumption. Most commonly, this phenomenon can be observed with file servers or other systems where a lot of data is deleted without being replaced with new data.
Another big sink for repository disk space consumption is useless files. While you might not need to back up data stored in certain files or directories in the first place, image-level backups force you to do this.
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via the fine folks at Veeam Software