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Update delta_backups.md

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Olivier Lambert 2016-01-14 18:11:08 +01:00
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delta_backups.md
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# Delta backups
# Continuous delta backups
> This feature is out since 4.11
> This feature is out since 4.11 and "Continuous" since 4.12
> WARNING: it works only on XenServer 6.5 or later
@ -29,6 +29,16 @@ So, if you want to rollback your VM to a previous state, the cost is only one sn
Even if you lost your whole SR or VM, you can use a Full backup to restore it completely, then apply any existing delta on top!
### Continuous
They are called continuous because you'll **never export a full backup** after the first one. We'll merge the oldest delta inside the full:
![](https://xen-orchestra.com/blog/content/images/2016/01/deltamergesmall-1.png)
This way we can go "forward" and remove this oldest VHD after the merge:
![](https://xen-orchestra.com/blog/content/images/2016/01/finaldeltasmall.png)
## Create Delta backup
Just go inside your "Backup" view, and select Delta Backup: