Long Initial (Full) VM Backup

Product Versio: 6.0

Last modified: 31 December 2015

Question

What may cause a long initial (full) VM backup?

Answer

A long initial (full) VM backup may be caused by a number of factors:

• A large amount of data that needs to be transferred during the first backup

• Slow or overloaded storage servers

• A slow or overloaded network

• Incorrect network configuration

• Failure to enable VMware Changed Block Tracking (CBT):
  

  • CBT helps identify which data blocks on VM disks are not utilized (free).
    

  • If CBT enabling fails on a VM, the product uses NAKIVO’s proprietary change tracking technology, which reads all data blocks to identify whether they are used or not.