?
Solved

Very slow file level back-ups of Hyper-V virtual machine

Posted on 2012-03-19
3
Medium Priority
?
675 Views
Last Modified: 2012-03-22
Recently I had a Windows 2003 32 bit server crash due to a RAID failure. We run DoubleTake Recover Now as a DR solution. Using Recover Now, a Hyper-V virtual machine was created of the failed server, and we were back in business within hours. Everthing runs well with the exception of my back-ups. Backing up to an IBM LTO tape library before the server crash used to average between 700mb-1000mb/minute. After the crash, the virtual machine took a 50% hit on backup throughput (about 400mb/min). I exported the VM to another Windows 2008 64bit hosts server to see if throughput would improve, and now the VM averages 200mb/minute. The orginal Hyper-v host had other applications running on it. The current host only runs one other VM and nothing else. Both are fairly new new IBM x-servers with plenty of memory (30GB and 24GB respectively).

I run Symantec Backup-Exec 2010. I tried both disk-to-disk and tape back-ups, as well as other virtual machines, and it is only this one VM that has the slow back-up problem. I spent a few hours with Symantec tech support and I am confident the problem isn't BE. Also, copying files to and from the VM via shares and mapped drives are fine.

Any help in solving this mystery would be helpful. If I can't get this problem solved very soon, I will be forced to use DoubleTake to revert this VM back to a provisioned physical server.
0
Comment
Question by:JPKoch
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 82

Expert Comment

by:David Johnson, CD, MVP
ID: 37744924
run perfmon (system resource monitor) on both the virtual machine and on the host machine and see if you can see any resource blocking
0
 
LVL 7

Accepted Solution

by:
Ilya Rubinshteyn earned 2000 total points
ID: 37747503
Check what you are using for a NIC on the slow HV Guest, legacy or synthetic. Legacy will slow your network connectivity on the VM down to 100 MBPS
0
 

Author Closing Comment

by:JPKoch
ID: 37753986
That did the trick. Thanks
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After seeing many questions for JRNL_WRAP_ERROR for replication failure, I thought it would be useful to write this article.
Backups and Disaster RecoveryIn this post, we’ll look at strategies for backups and disaster recovery.
This tutorial will show how to configure a new Backup Exec 2012 server and move an existing database to that server with the use of the BEUtility. Install Backup Exec 2012 on the new server and apply all of the latest hotfixes and service packs. The…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…
Suggested Courses

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question