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VeEAM Version 10 Replication task MK2

Dave Smith
Dave Smith asked
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Last Modified: 2020-07-28
Looking to implement Veeam 10 as a means to backup to disk locally and for the purpose of Disaster recovery using the replication task.

We currently have Two ESXI servers hosting around 15 VMs. We have another server of the same spec as the other two that we want to install at another site and have the site replication task target it.

Question is: at the secondary  site - does the storage have to be exactly the same? At the source site we have a SAN (where the VMs are stored) but at the target site only local storage on the server there.

On the secondary site, do I need to install a Server there and install Veeam? Or just setup ESXI/vSphere there?

Are all the VMs snapshots copied to the target site during the replication job? Or are they replicating in real time?

Many thanks



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Andrew Hancock (VMware vExpert PRO / EE Fellow)VMware and Virtualization Consultant
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Commented:
No need to have identical systems.

Just storage will do.

As for replication it depends on how often you replicate.

Do not get too wrapped up in Snapshots.

Author

Commented:
Hello Andrew, but surely if in the event of a fail over, identical VMs will need to reside on the target site's storage? So having a SAN with TB or storage at the source site compared with GBs at the target site will be an issue? What is actually replicating just a flag to the source VM or is the actual VM being copied over the network to the target's storage?

'As for replication it depends on how often you replicate' - I presumed the Veeam backup task replicates in real time (like say Double Take) rather than only running once a day for example? Can Veeam be configured to replicate in real time?
Andrew Hancock (VMware vExpert PRO / EE Fellow)VMware and Virtualization Consultant
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Commented:
Veeam replicates the VM from Primary to Secondary, so it is assumed that you have at least the same storage capacity at the Secondary DR site.

e.g. if a VM is 1TB, you will need at least 1TB at the DR site to store it.

and based on Replication Task will update how often is scheduled to run like every 60 minutes

Replication is configurable in the job when the next replication task is scheduled, the delta difference is what is copied to the destination.

Author

Commented:
Thanks again.

So it that is the case and the VM is replicated in it's entirety, then the storage on at each site will need to be identical in order to host the replicated VMs? Otherwise our 2nd site will quickly run out of storage as it's dwarfed by the SAN.

Author

Commented:
Can Veeam not replicate in real time as if say the primary site link goes down and users are unable to access the DC, would i then have to fire up a VM using the replicated VM at the 2nd site? If it's DC (or a database server)  for example, that will cause a whole load of sync issues surely?
Andrew Hancock (VMware vExpert PRO / EE Fellow)VMware and Virtualization Consultant
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Commented:
Well not identical storage but at least similar capacity or more.

Any datastore does not matter if local, SAN, NFS, vSAN etc

You would have to instruct a Failover, (via Veeam) or just Power on VMs at DR (which are called Replicas - vm_Replica).

You can run continuous replication to ensure minimum downtime, it's part of the job settings.

It's not automatic failover because there would need to be another vCenter Server at the DR site.

VMware Site Recovery Manager provides automated DR.

Author

Commented:
Andrew , nice one 👍.

We have an identical server at the 2nd site and I plan on installing another ESXI server (licensed) so as long as the storage matches I would be able to confirm Veeam to run automatic failover?

finally (hopefully!) What I was looking for a replication job was real time replication so if a site link goes down at the primary it automatically switches to the secondary. I did this with another software solution where I had identical hardware and software at each site and they were replicating data in real time so if a site went down the users would suffer no down time. Can Veeam achieve this?
Pete LongTechnical Architect
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Andrew Hancock (VMware vExpert PRO / EE Fellow)VMware and Virtualization Consultant
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We have an identical server at the 2nd site and I plan on installing another ESXI server (licensed) so as long as the storage matches I would be able to confirm Veeam to run automatic failover?

Yes

finally (hopefully!) What I was looking for a replication job was real time replication so if a site link goes down at the primary it automatically switches to the secondary. I did this with another software solution where I had identical hardware and software at each site and they were replicating data in real time so if a site went down the users would suffer no down time. Can Veeam achieve thiS?
No.

It's not automatic failover because there would need to be another vCenter Server at the DR site.

VMware Site Recovery Manager provides automated DR.

Author

Commented:
brilliant help as always.

As I now know that Veeam doesn’t replicate in real time what’s the benefit of it over normal daily backups? Backups of the VMs could be sent over the network and stored on the secondary server and spun up. I suppose what I’m trying to ask is: what’s Veeam’s replication job USP over a normal Veeam  backup job?

thanks👍
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David Johnson, CDSimple Geek from the '70s
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Author

Commented:
Thanks for getting me clued up on Veeam replication tasks!
Andrew Hancock (VMware vExpert PRO / EE Fellow)VMware and Virtualization Consultant
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Commented:
no problems, best way dive right in an experiment, if you have already purchased and install, it's just a few clicks!

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