My incremental backup seems slow !!!!

[Thebird13]

Hi

My english is not good but I will try

The incremental backup seems very long with Veeam Backup & Replication 11 and I would like to help my friend. I'm not an expert with Veeam Backup & Replication 11

The incremental backup takes around 11-12 h to transferred 10-11 GB but if I transfer a file 20 GB from the same server(where Veeam Backup & Replication 11 is installed) to the same targer (QNAP connected ethernet cat 6a cable) , this transfer take around 3-4 minutes

Im' not able to do printscreen but I will share you a lot of information from Veeam Backup & Replication 11


Job progress 100 %
Summary :
Duration : 11:12:45
Processing rate 119 MB/s
Bottleneck : Source
DATA
Processed : 4.5 TB(100%)
Read: 4.4 TB
Transferred : 10.1GB
Load : Source 80 % > Proxy 65% > Network 66% > Target 48 %

Inventory Tab

Name Used Size Provisioned Size Folder Host Guest OS
DM-APP01 4.4 TB 5.5 TB vm ESXi Microsoft WS 2012 R2(64bits)
DM-DC01 83.9 GB 84.2GB vm ESXi Microsoft WS 2012 R2(64bits)
Vcenter 46.2 GB 129.2 GB vm ESXi SUSE Linux Enterprise 11 (64bits)

Backup job report
Start time 20:00:11
End time 07:12:57(+1)
Duration : 11:12:46
Total Size : 5.7 TB
Data read : 4.4 TB
Transferred : 10.1 GB
Backup Size : 10 GB
Dedupe : 1.2x
Compression : 3.1x

DP-APP01 Success 20:04:54 7:12:52(+1) 5.5 TB 4.4TB 8 GB 11:07:58
DP-DC01 Success 20:00:22 80 GB 5.9 GB 1.7 GB 0:03:34
Vcenter Success 20:04:48 125GB 2.8 GB 440.5 MB 0:04:00

I hope that someone will be able to help me.

Thank you in advance

[soncscy]

Hi Daniel,

> Read: 4.4 TB

That's your problem. Incremental backups _should_ use CBT so that the backup application only needs to read the changed blocks from the last backup.

Seems like something is not right with CBT on this virtual machine. You might try resetting CBT in VMware: https://kb.vmware.com/s/article/2139574

Your next incremental backup will take a long time also, but the next one after should be faster.

If it doesn't work, probably you need to open a support case with Veeam and see why CBT isn't working correctly.

[Thebird13]

Thank you very much !!!!

I will check this and I will give you a feedback

[Thebird13]

Hi Harvey,

I think that is not possible with Vsphere 5.5

https://kb.vmware.com/s/article/2075984

[Mildur]

Then it will take time to read the entire data each time
For vSphere 5.5, consider upgrading to a newer one. End of general support was in 2018.

Veeam V12 will probably drop support for vSphere 5.5.
Same for Suse 11.

You could use Veeam Agents as an alternative. They also will use CBT, but it would be a backup from inside the vms and not outside. It could lower your backup times until you can upgrade your esxi hosts to a newer version. Restore can be done directly as a vm backup to the esxi host.

[soncscy]

Hey Daniel,

I think the article you linked is about a bug from the vCenter UI, not that it's not possible.

You just will need to manually set the CBT value -- the steps should still work.

[Mildur]

True, Harvey is correct. Haven't opened the link yet.

But please consider the upgrade someday.

[Thebird13]

Thank you very much !!!

I will try to set cbt manually and see if this can change the result

Thank again