Solved

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

Posted on 2012-03-19
3
666 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
3 Comments
 
LVL 78

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 500 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

Network it in WD Red

There's an industry-leading WD Red drive for every compatible NAS system to help fulfill your data storage needs. With drives up to 8TB, WD Red offers a wide array of solutions for customers looking to build the biggest, best-performing NAS storage solution.  

Question has a verified solution.

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

#Citrix #XenApp #Citrix Scout #Citrix Insight Services #Microsoft VMMAP #Microsoft ADEXPLORE #Microsoft RAMMAP #Microsoft TCPVIEW #Microsoft AUTORUNS #Microsoft PROCESS EXPLORER #Microsoft PROCESS MONITOR
In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
This tutorial will walk an individual through the steps necessary to configure their installation of BackupExec 2012 to use network shared disk space. Verify that the path to the shared storage is valid and that data can be written to that location:…
This tutorial will walk an individual through configuring a drive on a Windows Server 2008 to perform shadow copies in order to quickly recover deleted files and folders. Click on Start and then select Computer to view the available drives on the se…

920 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

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now