Maintain control of your Microsoft Office 365 email data
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Joined: Aug 21, 2019 5:46 pm
Full Name: Graham Murison

Sizing repository

Post by Gears » Aug 26, 2019 8:02 pm

Sorry if this a duplicate,. I tried the search feature and found a few entries on the topic of sizing this, but none with any specific examples.
I am a new customer trying to deploy VBO for the first time. I have also review documentation, but it seems to gloss over this topic.

I have also review VBO deployment guide, which is for 2.0 which may be outdated since the relase of 3.0.

Using our mailbox size of 215GB and daily change rat of .1 GB and 90 days of retention, I come to a requirement of 19TB.
Does this sound right to anyone else? that seems quite high!

Sorry in advance for my ignorance.

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Full Name: Niels Engelen

Re: Sizing repository

Post by nielsengelen » Aug 26, 2019 9:46 pm

That does sound high. Is every mailbox already 215GB? How many mailboxes do you have? And do they all change at 1GB every day?
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Full Name: Karsten Meja

Re: Sizing repository

Post by karsten123 » Aug 27, 2019 6:22 am

215 + (0.1 * 2) * 90 + 10% = 256.3 GB
it is actually slightly less because of compression.

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Full Name: Polina Vasileva

Re: Sizing repository

Post by Polina » Aug 27, 2019 9:11 am 1 person likes this post

Hi Graham and welcome to Veeam Forums,

First, the sizing recommendations provided in the v2 deployment guide are still relevant for v3. The updated version should be published in a couple of weeks, but for estimating Exchange Online backup storage the current guide is OK.

Next, in the VBO PowerShell module, there's a cmdlet which allows calculating the initial storage requirements - and it's also available in the Community Edition, which you can install and use for free. For example, to estimate the first full backup size of all mailboxes with Snapshot-based retention, you could run the following:

Code: Select all

$org = Get-VBOOrganization -Name ""
Measure-VBOOrganizationFullBackupSize -Organization $org -Mailbox
Hope it helps.

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