Backup of a VM located on a NAS

[EBoucq]

Hi,

I need to optimize the duration of a backup.
The VM is a replica. Size: 8 TB.
It's located on a NFS (Synology NAS) datastore and the target storage is an iSCSI storage array
The actual processing rate is around 90 MB/s.
Any advice regarding the settings of the job so the backup doesn't last more than 30 hours ?
I know I can't expect a miracle with such a configuration but right now, backing up this machine isn't something viable...
Thanks !

Eric

[Shestakov]

Hello Eric,
Backup performance analysis is usually started from the bottleneck statistics. Could you provide the job`s statistics(Source/Proxy/Network/Target)?
What transport mode and backup method are in use?
Thanks!

[foggy]

Remember, CBT cannot be used when you backup replicas, so each time it needs to scan the entire VM for changes.

[EBoucq]

Thanks for your reply.

Bottleneck stats are obvious
Source: between 90 et 99%
Proxy: ~10%
Network: 0%
Target: ~6%

Backup mode: Incremental
Transport mode: network

[foggy]

What is the reasoning behind backing up replica VM in this particular case?

[EBoucq]

to do "backup to tape".....source VM is on client's site....replica is on our site...and tape too

[foggy]

Ah.. so this is still the same 8TB replica VM... Since you decided to backup the entire VM backup to tape, is there a chance you could use local backup of this VM at the client`s site as a source for the backup copy job to your site? It will be incremental and probably complete faster then backup the replica.