To limit the overall backup size you can reduce the number of item versions in document libraries and lists. (Total data size) + ((Daily change rate) * (Days of retention)) + (10% working area)įrom our field experience we see daily change rates of about 0.5 to 1%. The formula for SharePoint and OneDrive data is the same (OneDrive for Business is basically SharePoint under the hood). Consider the “total data size” to be the size planned for (including growth & migrations) when calculating for repository size in the future.
With this data you can estimate the daily change rate and the total source data size for this formula. Be aware that this only reflects your current usage in the cloud and the backup on disk will be larger because of metadata and backed up item versions. for SharePoint at Reports > Usage > SharePoint > Site Usage > Storage. You can view current and previous data usage for SharePoint Online and OneDrive for Business in the Microsoft 365 Admin Center, e.g. While processing the backups transaction protocols and database checkpoints can take up to 10% of the repository space which is calculated as the workspace. More optimistically this factor can be also calculated with 1.5. For normal mailbox backups the change rate is multiplied by 2 because of archiving and file versioning which takes up additional backup space. In the field we experience typical daily change rates from 0.2 to 1%. The following example returns the size of all primary mailboxes and can be adapted for archive mailboxes using the -Archive option: Get-Mailbox | Get-MailboxStatistics | Select-Object DisplayName, ItemCount, TotalItemSize | Format-Table –autosize You can get the Total size of current primary mailboxes with Get-Mailbox and Total size of current archive mailboxes with Get-Mailbox -Archive. If you run an existing M365 or on-premise Exchange use the PowerShell commandlets Get-Mailbox and Get-MailboxStatistics on your infrastructure to get input to the following formulas.
(Current archive mailboxes total size) + ((Daily change rate) * (Days of retention)) + (10% working area)
0 kommentar(er)
