So now we know the formula, the next step will be to find the data to fill the parameters to calculate the disk space requirements. So make sure to visit it once in a while. There is a lot of good information there. This formula comes from the Veeam Communities. R = number of rollbacks (or increments) according to retention policy (14 by default)ĭ = average amount of VM disk changes between cycles in percent (we use 10% right now, but will change it to 5% in v5 based on feedback… reportedly for most VMs it is just 1-2%, but active Exchange and SQL can be up to 10-20% due to transaction logs activity – so 5% seems to be good average) This is the formula:ĭata = sum of processed VMs size (actually used, not provisioned)Ĭ = average compression/dedupe ratio (depends on too many factors, compression and dedupe can be very high, but we use 50% – worst case)į = number of full backups in retention policy (1, unless backup mode with periodic fulls is used) Before you can calculate these values you need to know the formula which Veeam uses to calculate the storage needs. You can use the Check Space button to verify if there is enough space to write the backup to disk:īut is it possible to get this values via Powershell. When you edit or create a new backup job in Veeam Backup and Replication. Assuming 1% growth, then the next pass will be an additional 360MB of data and so on.This post is about how to calculate the storage needs for the configured Veeam Backup Jobs. After the first backup, all subsequent backup passes are incremental backups with Veeam backup for Office 365. Using my examples above, I needed 36GB of space to protect all data at its peak consumption. It’s a similar story for OneDrive for business and SharePoint Online.
This is important for determining the space that will be required to meet your backup retention requirements. Using the growth figures, we can roughly calculate growth as a percentage.
If you click on Storage, you will be able to check consumed space but more importantly, you will see growth over the last 180 days.
Click on ‘Select a report’.įrom here, let’s take a look at the Exchange Online usage stats. You will now see some usage stats for each application consumed from Office 365. Now if you take a look at the side menu you will see a Reports section. So how does one check the consumed storage space for Exchange Online, SharePoint Online and OneDrive for business? Give me the info…įirst things first, get yourself logged into the Office 365 admin portal. I recently expanded my Veeam for Office 365 deployment to protect additional organisations but it struck me that I had no idea how much data I needed to protect from Office 365! If this was on-premises Exchange or SharePoint data, I could have looked at the database sizes to get an idea of how much data I would likely need to protect or run some PowerShell scripts to see how much space is consumed.
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