Transfer Speed of VMWare ESXi 4.1

Hi Again,

I am today and have always really on many sites got slow Transfer Speeds moving or copying VM again where to a Network share or another HOST

I know there is lots of Talk and forums around on this but i just thought i would get your opinion on it all.

I use Veeam FastSCP most times but even as i am going today using the converter very slow

At the moment i am  converting a VM from 1 x 80GB HDD 53GB free and 1x 450GB (re-sizing it to 600GB) to another ESXi Host and it is going to take...well its saying one day, but i know that will move around i little through the conversation

Both servers are connected with a GB link

Any input on this subject

Adam



cdsausAsked:
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Paul SolovyovskySenior IT AdvisorCommented:
Using vmware converter you will get about 500MB to 600MB per minute.  Since it's file level migration it all depends on number of files, source OS (if you're running a P2V) and other factors.  From doing severa hundred of these 500MB to 600MB per minute is normal transfer rate.  This is about what I've seen for P2V and V2V as well.

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IanThCommented:
it also depend on factors like other activety on the lan, for instance vmware traffic
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Speed of conversion is based on network speed, source read transfer disk benchmarks, and destination source  write benchmarks.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
What version of converter are you using?
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cdsausAuthor Commented:
Version 5

Source Machine is IBM x3550 DC 3.2 8GB 2 x 1TB SATA Raid1

Dest Machine: IBM x3650 M2 QC 2.6 16GB 1.1TB HDD SAS RAID 5

Both Plugged into GB Switch no Traffic other then this happening at the moment

Adam
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, the issue is the SATA disks, read and write transfer speeds of SATA disks are poor, RAID 1 is not a particular fast RAID for read and write.

So with those disks and configuration I would expect, slower transfer times. Also VMware Converter 5.0 is slower than VMware Converter 4.3!
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Also RAID 10 would be a better selection than RAID 5, for write performance.
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cdsausAuthor Commented:
Ok

Why is Version 5 slower ?

Should i just be using Version 4.3 then at my sites is there any advantage in version 5 i can see there must be some set backs

Adam
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
VMware Converter 5.0 uses NFC (a proprietary VMware protocol) for cloning to managed destination. Security has been enhanced in Converter 5.0 by encrypting the data transfer. Unfortunately this has caused a more severe performance degradation than expected.

You could use 4.3, or make the following modficiation to 5.0

Switching off SSL encryption is a way to work around this issue. Here is how it is done:

Open the converter-worker.xml configuration file. It is located in "%ALLUSERSPROFILE%\VMware\VMware vCenter Converter Standalone" folder for Windows Vista or newer or in "%ALLUSERSPROFILE%\Application Data\VMware\VMware vCenter Converter Standalone" for older Windows versions.

    Set the key Config/nfc/useSsl to false and save the configuration file.
   
Restart "VMware vCenter Converter Standalone Worker" service.

 I think you will find the transfer times will be improved.
<nfc>
       <readTimeoutMs>120000</readTimeoutMs>
       <useSsl>false</useSsl>

Open in new window

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cdsausAuthor Commented:
Will making these changes get to the same rough speed as 4.3 or should i just be using 4.3

Are there any advantages in 5 ?

Thanks Adam
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
VMware Converter 5.0 does have newer features like partition alingement, and making those changes will make transfers similar speed to that of 4.3.
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cdsausAuthor Commented:
Ok i have made the changes and will see if that helps.

Can you explain to me in basic the feature in the converter with the partitioning about the cluster size, it defaults to 4KB should you ever modify that default

Thanks Adam

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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If using a SAN, the virtual machine VMDK should be aligned with the storage.
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cdsausAuthor Commented:
Ok i am using Internal Disk in almost all of my installs so i presume just leave it as Default 4K

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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes correct.
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cdsausAuthor Commented:
Well done again guys, thanks for all your help

Adam
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