Maximize Speed in VMware Converter 5

When converting physical or virtual machines, VMware Converter 5 can be extremely slow. I had a 260 GB physical Windows 2003 box in a P2V job that was estimated to last 9 days. Yikes. The transfer rate was a running- in-mud 440 kbps.

By default, the converter is encrypting data during the conversion. This is the main problem with the speed. The other adjustment I made was changing the conversion job settings to thin provision the new virtual disks. By combining the two changes, throughput for the job increased from 440 KBps to between 15-21 MBps and dropped the duration from 216 hours to 5.

To turn off encryption in VMware Converter 5:
Optional tool: Microsoft XML Notepad 2007. This makes it much easier to find the specific entry in the XML file.

  1. Stop any running conversions
  2. Find the converter-worker.xml file.  (%ALLUSERSPROFILE%\VMware\VMware vCenter Converter Standalone/)
  3. Open the file with Microsoft XML Notepad
  4. Edit the following key. Change to “false”

Remove Encryption

5. Save the file.
6. Restart the “VMware vCenter Converter Standalone Worker” service

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Categories: IT Pros, VMware

Tags: , , ,

2 replies

  1. hi, tried it already, but I still have 5% of 1GBit network load. Source is a ml350g6 physical. Destination is a ml350g5 with 8x 10k in raid5. 2 hours searching dr. google lead to the fact, that all people in the world seem to suffer from that converter. BUT I didn’t have these perfomance issues before (on other, but identical hardware). So I’m very confused why suddenly this thing got stuck. Any idea? Thanx in advance!

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