Comprehensive data protection for all workloads
Post Reply
corby
Influencer
Posts: 14
Liked: 2 times
Joined: May 07, 2009 11:20 pm
Full Name: Corby Agid

Restores seem slower than backups

Post by corby »

Hello,

I am evaluating the Veeam backup software. I have backed up VMs using VCB SAN Mode. I have tested a restore.

The restore process seems to be much slower than the backup process. Also, judging by the fact that a restore requires SSH authentication, and there is no option for SAN Mode, I am wondering if the restore is being performed over the network.

Is this true? Are restores performed over the network rather than through the SAN fabric?

Corby

Gostev
SVP, Product Management
Posts: 26679
Liked: 4268 times
Joined: Jan 01, 2006 1:01 am
Location: Baar, Switzerland
Contact:

Re: Restores seem slower than backups

Post by Gostev »

Corby, that is correct. With VI3, there is no API exists that would provide with ability to write directly to VMFS. It has to go through ESX. So restore over the network is the only option. We can do restores with or without service console agent, but using service console agent provides much better performance.

Note that if your backup storage is attached directly to target ESX host, and using service console agent, the restore process becomes LAN free.

Thank you!

mdornfeld
Expert
Posts: 125
Liked: 2 times
Joined: Mar 23, 2009 4:44 pm
Full Name: Matt
Contact:

Re: Restores seem slower than backups

Post by mdornfeld »

We have been thoroughly testing out the Veeam Backup software package. We found that using the Service Console Agent, the restores went at only 11 MB/sec average. Using Agentless, the restores went at 50 MB/sec average, which is completely opposite of the way that I've been told Veeam should work. I've already had my results forwarded over to dev. Btw Veeam dev, 50MB/sec is still way too slow.

Gostev
SVP, Product Management
Posts: 26679
Liked: 4268 times
Joined: Jan 01, 2006 1:01 am
Location: Baar, Switzerland
Contact:

Re: Restores seem slower than backups

Post by Gostev »

Matt, wow that would be interesting for us to investigate. Slow service console agent restore is strange, but 50MB/s agentless restore is totally unexpected (5-10 times faster than everyone else is getting). Do you have battery-backed write cache on the ESX host you were performing tests with, by any chance? What ESX version are you using?

mdornfeld
Expert
Posts: 125
Liked: 2 times
Joined: Mar 23, 2009 4:44 pm
Full Name: Matt
Contact:

Re: Restores seem slower than backups

Post by mdornfeld »

Hi Gustov.
We are using ESX 3.5 Update 4.
Our setup consists of our HS21XM IBM Blade hosts connected via fiber to IBM SAN Volume Controllers (SVC's) with 8 GB Cache, connected to a DS4700 via 4GB Fiber.

Gostev
SVP, Product Management
Posts: 26679
Liked: 4268 times
Joined: Jan 01, 2006 1:01 am
Location: Baar, Switzerland
Contact:

Re: Restores seem slower than backups

Post by Gostev »

Nice hardware :)

Post Reply

Who is online

Users browsing this forum: Baidu [Spider], Google [Bot] and 32 guests