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Título
Changed Block Tracking (CBT) and vRanger -
Descripción
While replicating or backing up a VM from source to target/repository first run is a full replication/backup - all data is copied from the ESX(i) host to your destination.
After the full run, the next differential or Incremental will use CBT if enabled on the VM and will only replicate/backup the blocks that have changed since the last successful replication/backup.
Prior to ESX 4 and VM hadware 7 the software had to scan the vmdk disks to determine which blocks are new. This was CPU and memory + time intensive. CBT is a feature introduced in ESX4 that tracks what blocks have changed on the vmdks.
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