Explain Storage Requirements?

[DorTech]

Hi All,

Sorry for the basic questions, but here goes.
I'm looking at Veeam Data Cloud Vault, "VDCV" as an forth place to store backups.
I'm currently backing up to Disk, replicating to a remote NAS and also to tape in full each night.

My daily full backup to tape is 2TB

I run incremental backups during the day and a full backup at the end of the day.
These job runs Monday to Friday.
A backup to disk job will run over the weekend.

After populating the calculator it reports that I would need to purchase 8TB of storage.
So it is my understanding that the calculator hasn't accounted for daily full backups only incremental backups.

Is that correct?
Is the VDCV not designed for daily full backups?

Can I not feed it incremental backups during the day that will rollup to a full backup?

Thoughts?


https://www.veeam.com/calculators/simpl ... t/machines

[benthomas]

Firstly, what inputs did you set on the calculator? (Source Data, Change Rate, GFS settings)

Secondly, the calculator is designed around simulating daily backups, not multiple backups a day, but you can certainly send backups to Vault as often as you want.
How often are you doing incrementals during the day? Every hour? Every 8 hours? The closest way to simulate it in the calculator would be to change the dailies to the number of backups (Hourly+Daily) you expect to have. So 2 weeks at 4 backups a day would be 14 * 4 = 56 dailies.

How as for storage consumption, Vault being object storage based, it enables the use of synthetic fulls, so that when you create a "full" backup, it really only consumes the same space as another incremental, and instead has pointers to the other objects from previous backups it needs to make the "full" up.
So a 2TB Daily backup on tape, might only take up 100GB on Object each day if it's had 5% of change compared to the previous day

[DorTech]

Thanks for the reply.

So, I set these inputs.
Source Data: 2TB
Change Rate: 5%
Retention
Days: 125 dailies - Based on 5 daily reverse incremental backups Monday to Friday each week x amount of weeks in the month - Is that correct?
Extended Retention
Weeks: 4 weeklies - Does this mean "retain 1 backup for each week or 4 backups for each week?
Months: 3 monthlies - Again, does this mean, "retain 1 backup for 3 months, or 3 backups for 1 month?
Years: 1 yearlies

So I understand, that it doesn't store loads of 2TB full backups, but pointers to the original.

[benthomas]

If you click on details, you can see the restore points and the estimated size for each. The Yearly assumes the standard 50% reduction from dedupe/compression, and so its 1TB. Daily incrementals are your 5% change rate which is 100GB, and ofter dedupe/compression of 50% is 50GB (0.05TB). The monthly and weekly backups are synthetic fulls so just incur the incremental backup size again of 0.05TB.

1x Yearly = 1 TB
3x Monthly = 3x 0.05TB or 0.15TB
4x Weekly = 4x 0.05TB or 0.2TB
125 Incrementals = 125x 0.05TB or 6.25TB
Total = 7.6 TB + Immutability overhead 0.5TB

If you look at your existing restore points, and you find you're not generating 0.05TB (50GB) restore points every incremental, then you could adjust the change rate to match your current restore points.

You should note that reverse incremental backups are deprecated from V13 onwards (veeam-backup-replication-f2/deprecated- ... 97087.html)

As for Dailies/weeklies/monthlies/etc in the calculater, it's exactly that, how many daily/weekly restore points should be kept. 4 weeklies mean it will keep the last 4 weekly restore points (if you're doing weekly GFS on the backup job)