Discussions specific to the VMware vSphere hypervisor
Post Reply
Moebius
Veeam ProPartner
Posts: 169
Liked: 23 times
Joined: Jun 09, 2009 2:48 pm
Full Name: Lucio Mazzi
Location: Reggio Emilia, Italy
Contact:

Hotadd and VMs with many disks

Post by Moebius »

Greetings.
We have some VMs with many virtual disks (10 or so), spread on some different datastores.

We use the Hotadd method to back these VMs up. I have been looking closely at the process and noticed that the Veeam virtual machine reconfigures itself twice for each virtual disk of the target. That is, for EACH disk of the target, the Veeam server first hot-adds ALL the target VM disks, backs up one disk, detaches all the added disks, then proceeds to the next starting the whole procedure over. This repeated process takes most of the overall processing time when the target has many disks with limited storage data on each.

Is there a reason for this? Wouldn't it be possible instead to hot-add all the disks just once, back all them up, and detach all of them?

Gostev
SVP, Product Management
Posts: 26693
Liked: 4273 times
Joined: Jan 01, 2006 1:01 am
Location: Baar, Switzerland
Contact:

Re: Hotadd and VMs with many disks

Post by Gostev »

Hi Lucio, I will check with the developers on the reason behind that when I am back from the holiday. Thanks!

Moebius
Veeam ProPartner
Posts: 169
Liked: 23 times
Joined: Jun 09, 2009 2:48 pm
Full Name: Lucio Mazzi
Location: Reggio Emilia, Italy
Contact:

Re: Hotadd and VMs with many disks

Post by Moebius »

Hi Anton, I assume you're back from holidays. Any news on this one? Thanks!

Gostev
SVP, Product Management
Posts: 26693
Liked: 4273 times
Joined: Jan 01, 2006 1:01 am
Location: Baar, Switzerland
Contact:

Re: Hotadd and VMs with many disks

Post by Gostev »

Hi Lucio - yes, I have discussed this with the devs. Apparently, there is no particular reason for this implementation, and they said they can change this in the future release to only hot add disks once. Thanks!

lobo519
Expert
Posts: 315
Liked: 37 times
Joined: Sep 29, 2010 3:37 pm
Contact:

Re: Hotadd and VMs with many disks

Post by lobo519 »

This might be a bit pre-mature but I applied hotfix 3 and this seems have shaved about 7-10 minutes on my replication jobs. I am thinking it maybe due to this fix!!

foggy
Veeam Software
Posts: 19441
Liked: 1764 times
Joined: Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson
Contact:

Re: Hotadd and VMs with many disks

Post by foggy »

Yes, this was fixed in the last patch (see the sticky topic for the whole list of fixes).

Moebius
Veeam ProPartner
Posts: 169
Liked: 23 times
Joined: Jun 09, 2009 2:48 pm
Full Name: Lucio Mazzi
Location: Reggio Emilia, Italy
Contact:

Re: Hotadd and VMs with many disks

Post by Moebius »

That's good news. It's nice to see that the R&D dept. actually listens to the customers' suggestions. Thanks!

Post Reply

Who is online

Users browsing this forum: Google [Bot], vladyslav.rudyk and 44 guests