Host-based backup of VMware vSphere VMs.
Post Reply
beistrich
Influencer
Posts: 16
Liked: never
Joined: Feb 04, 2014 8:06 am
Full Name: Christoph
Contact:

Backup starting fast - then gets incredibly slow!

Post by beistrich »

Hello!
I have again a strange problem with veeam. It is the first backup, so veeam performs a full backup.
The backup starts with about 90Mb/s but then becomes steadily slower - ow it stands at 2 - 5 Mb/s

It says the bottleneck is the target (87% at the moment, but now ap 99%). But this is strange, because the backup process becomes slow only later - approximately after the 2nd vm (of 13!)

This is the graph:
Image

Image

Somebody has an idea - Its VB 7 Patch 3
foggy
Veeam Software
Posts: 21069
Liked: 2115 times
Joined: Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by foggy »

Christoph, have you monitored CPU and memory usage on the proxy during the backup? Here's an old but useful thread regarding similar issues, should give you some thoughts.
beistrich
Influencer
Posts: 16
Liked: never
Joined: Feb 04, 2014 8:06 am
Full Name: Christoph
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by beistrich »

Hi!
CPU of the Proxy is less than 20%...
Also tried to reset "CBT" - also doesn't help.
Any other Idea?
Should I try disabling indexing?
foggy
Veeam Software
Posts: 21069
Liked: 2115 times
Joined: Jul 11, 2011 10:22 am
Full Name: Alexander Fogelson
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by foggy »

What if you try to backup to some other storage to check whether the storage is the actual cause of this slow down?
beistrich
Influencer
Posts: 16
Liked: never
Joined: Feb 04, 2014 8:06 am
Full Name: Christoph
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by beistrich »

It is not the storage I think.
When I back up a single VM the speed is normal.
When I create a backup job with multiple VMs it is very slow! (1 VM at a time) - using vCenter Server Appliance.
tsightler
VP, Product Management
Posts: 6009
Liked: 2843 times
Joined: Jun 05, 2009 12:57 pm
Full Name: Tom Sightler
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by tsightler »

Can you tell us something about the backup storage? Is it a NAS?
beistrich
Influencer
Posts: 16
Liked: never
Joined: Feb 04, 2014 8:06 am
Full Name: Christoph
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by beistrich »

Yes its a NAS (Qnap) with 12 TB (4*4 TB RAID5)

Backup settings:
1 Concurrent task
Lan Target
CBT activated
NBD
VSS activated (no indexing)
Veeam connects through vCenter Server appliance.
VMs are chosen selectively
veremin
Product Manager
Posts: 20270
Liked: 2252 times
Joined: Oct 26, 2012 3:28 pm
Full Name: Vladimir Eremin
Contact:

Re: Backup starting fast - then gets incredibly slow!

Post by veremin »

With one concurrent task, there should be no difference between job with one or multiple VMs, as only one VM can be processed at any given moment. If I were you, I would still try to backup to different location in order to exclude target storage from list of suspects. Thanks.
Post Reply

Who is online

Users browsing this forum: No registered users and 88 guests