Host-based backup of VMware vSphere VMs.
Post Reply
chimera
Enthusiast
Posts: 57
Liked: 3 times
Joined: Apr 09, 2009 1:00 am
Full Name: J I
Contact:

Calculating Digests really slow - normal?

Post by chimera »

Hi,
Did a Veeam backup to USB disk, restored at target site. Setup replication jobs to replicate the VM's, the jobs run REALLY slowly - eg; hard disk 1 is 15GB, it took 16 hours to calculate digests then 35 minutes to replicate the changes. The 2nd hard disk is 150GB in size its been calculating digests for 7 hours now and is only 3% of the way through. Is this normal? Is there anyway to speed this process up?
Cheers
tsightler
VP, Product Management
Posts: 6035
Liked: 2860 times
Joined: Jun 05, 2009 12:57 pm
Full Name: Tom Sightler
Contact:

Re: Calculating Digests really slow - normal?

Post by tsightler » 1 person likes this post

Do you have a proxy on the target side? Is it being properly used? Sounds like probably not. You might have to manually select the proxy.
chimera
Enthusiast
Posts: 57
Liked: 3 times
Joined: Apr 09, 2009 1:00 am
Full Name: J I
Contact:

Re: Calculating Digests really slow - normal?

Post by chimera »

legend thanks... its always the simple things one overlooks... much faster now with the target proxy configured :lol:
karlochacon
Enthusiast
Posts: 51
Liked: never
Joined: Mar 21, 2012 5:43 pm
Full Name: Carlos Chacon
Contact:

Re: Calculating Digests really slow - normal?

Post by karlochacon »

yeah must faster now with a proxy at the recovery site, one more question guys

the metadate replica must be in the source site right? or in can be stored at the recovery site I mean because my veeam can crash and the metadata can be stored in it?
Vitaliy S.
VP, Product Management
Posts: 27377
Liked: 2800 times
Joined: Mar 30, 2009 9:13 am
Full Name: Vitaliy Safarov
Contact:

Re: Calculating Digests really slow - normal?

Post by Vitaliy S. »

Hi Carlos,

Replica metadata should be stored on the source site as it is described by the corresponding label next to the repository choice options. Having metadata on the source site allows you to calculate VM digest information in a much quicker way. Be aware that there is no point in hosting metadata files on the remote site, since this data is not required during DR (failover) situations.

Thanks!
pmillard5000
Novice
Posts: 5
Liked: never
Joined: May 02, 2017 2:48 pm
Full Name: Peter Millard
Contact:

Re: Calculating Digests really slow - normal?

Post by pmillard5000 »

Hi there,

Just picking up on this again.

We have replication jobs that are also taking hours to generate the digests for the disks.
These jobs have multiple servers within that are potentially on different hosts.
I have specified the proxy servers that reside on each host that could be hosting the VM for both the target and destination, so multiple proxy's are selected.
So for example we have 3 hosts each with a proxy in site1 and 3 hosts each with a proxy in site2.
I have specified each proxy in site1 where the VM resides and selected each proxy in site 2 where the vm is being replicated to.
Is this the best practice?

Many thanks
DGrinev
Veteran
Posts: 1943
Liked: 247 times
Joined: Dec 01, 2016 3:49 pm
Full Name: Dmitry Grinev
Location: St.Petersburg
Contact:

Re: Calculating Digests really slow - normal?

Post by DGrinev »

Hi Peter,

Yes, it's recommended approach to have dedicated proxies in both sites.
Please review this article as it contains replication best practices. Thanks!
Post Reply

Who is online

Users browsing this forum: Google [Bot] and 64 guests