Hello, I have a query.
In a scenario with large mail files (OST and PST) that only change partially.
Is there an option in Veeam Backup to only copy the part that has changed?
How does deduplication.
Does Veeam implement this functionality?
Thank you for your attention.
A greeting.
Best answer by vNote42
When you talk about Windows in a vSphere VM, Veeam uses VMware Change Block Tracking (CBT). This works - as
+23Hello, I have a query.
In a scenario with large mail files (OST and PST) that only change partially.
Is there an option in Veeam Backup to only copy the part that has changed?
How does deduplication.
Does Veeam implement this functionality?
Thank you for your attention.
A greeting.
Hi! Veeam does this at a block level already, so only changed blocks are protected in subsequent job runs.
+1You may explain the environment a bit more to understand the used case.
+13When you talk about Windows in a vSphere VM, Veeam uses VMware Change Block Tracking (CBT). This works - as
You may explain the environment a bit more to understand the used case.
Hi there,
I explain the case a little more.
I have a PC with an imap account in outlook, it receives emails daily, but not many, however the .ost file changes daily.
My question is, is there a way to configure Veeam to only copy changes on the file?
In the style of deduplication, or this should be done by the device where i make the copy.
Thank you for your attention.
+13I assume you use Veeam Windows Agent for this backup?
Here are the details for Windows Agent Changed Block Tracking (CBT):
https://helpcenter.veeam.com/docs/agentforwindows/userguide/backup_cbt_default.html?ver=40
In short:
Thank you all,
Indeed, the copy would be made using an agent.
It is clear to me how Veeam works.
Thank you very much for your attention.
Greetings.
Wow! That explains a lot. IMO backing up changed blocks qualifies as an incremental backup, maybe even a very efficient incremental backup.
But it’s a long way from what I would call deduplication.
With true deduplication:
if I had (3) copies of the exact same file, stored anywhere in the backup selection of a given Job, it would store one copy of the data, and two tiny pointers referencing the data for the other two filenames.
If I have (150) excel spreadsheets, all based off the same template, that when compared block for block are found to be 50% identical, those blocks would be deduplicated.
Thanks for clarifying. So glad I’m only using the free windows agent.
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